{"title":"2020 Used Chevy Silverado 3500 Transmissions For Sale | Auto Power Source","description":"\u003c!-- APS-COLL-2020-CHEVY-SILVERADO-3500-TRANS-T4-2026-07-17-v1 --\u003e\n\u003clink rel=\"stylesheet\" href=\"https:\/\/fonts.googleapis.com\/css2?family=Source+Serif+4:opsz,wght@8..60,400;8..60,500;8..60,600;8..60,700\u0026amp;display=swap\"\u003e\n\u003cstyle\u003e\n.collection-hero,.collection-hero__inner,.collection-hero__text-wrapper,.collection-hero__description,.shopify-section--collection-banner{padding-top:0!important;margin-top:0!important;}\n.shopify-section-group-header-group+.shopify-section .collection-hero{padding-top:0!important;margin-top:0!important;}\n.rte:has(.aps-page){max-width:none!important;width:auto!important;margin:0!important;padding:0!important;}\n.aps-page{width:100vw;max-width:100vw;margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw);}\n.aps-page,.aps-page *{font-family:'Source Serif 4','Source Serif Pro','PT 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16px!important;}.aps-h2{font-size:23px!important;}.aps-grid-3{grid-template-columns:1fr!important;}.aps-grid-4{grid-template-columns:repeat(2,1fr)!important;}.aps-grid-6{grid-template-columns:repeat(2,1fr)!important;}.aps-trust-row{grid-template-columns:repeat(2,1fr)!important;}.aps-cta-bar{flex-direction:column;}.aps-compare-hint{display:block!important;}}\n\u003c\/style\u003e\n\u003cdiv class=\"aps-page\"\u003e\n\u003cdiv class=\"aps-hero-dark\"\u003e\n\u003cdiv class=\"aps-stat-grid\"\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv class=\"aps-stat-num\"\u003e3\u003c\/div\u003e\n\u003cdiv class=\"aps-stat-label\"\u003everified units in stock\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;border-left:.5px solid rgba(255,255,255,.15);border-right:.5px solid rgba(255,255,255,.15);\"\u003e\n\u003cdiv class=\"aps-rating-line\"\u003e\u003cspan style=\"color:#f4c860;\"\u003e★★★★★\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"aps-rating-line\" style=\"margin-top:4px;\"\u003e\u003ca href=\"https:\/\/www.trustpilot.com\/review\/autopowersource.com\" target=\"_blank\" rel=\"noopener\"\u003eExcellent Customer Reviews\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"aps-stat-label\" style=\"margin-top:6px;\"\u003eon Trustpilot\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv class=\"aps-stat-num\"\u003e3 years\u003c\/div\u003e\n\u003cdiv class=\"aps-stat-label\"\u003emax warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;border-left:.5px solid rgba(255,255,255,.15);\"\u003e\u003cdiv style=\"font-size:21px;font-weight:600;color:#fff;line-height:1.2;\"\u003ePhotos before\u003cbr\u003eshipment\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aps-bc\"\u003e\n\u003ca href=\"\/\"\u003eHome\u003c\/a\u003e › \u003ca href=\"\/collections\/used-engines-and-transmissions\"\u003eUsed Engines \u0026amp; Transmissions\u003c\/a\u003e › \u003ca href=\"\/collections\/used-chevy-transmissions-for-sale\"\u003eUsed Chevy Transmissions\u003c\/a\u003e › \u003ca href=\"\/collections\/2020-used-chevy-transmissions-for-sale\"\u003e2020\u003c\/a\u003e › Silverado 3500\u003c\/div\u003e\n\u003ch1 class=\"aps-hero-headline\"\u003e2020 Used Chevy Silverado 3500 Transmissions For Sale\u003c\/h1\u003e\n\u003cp class=\"aps-hero-desc\"\u003eThree verified 2020 Chevy Silverado 3500 transmissions are in stock and ready to freight. Each one is listed against the 2001-Up Silverado 3500 span, each is an automatic, and each sits behind a 6.6L — so the badge on the tailgate will not narrow this page down for you. Fuel and drivetrain will. Every unit is VIN-matched to your truck, shift-tested under load by ASE-certified technicians and photographed before it ships, backed by up to a 3-year warranty and 30-day money-back. Free freight to all fifty states.\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ca href=\"sms:+13074415554?\u0026amp;body=Hi%2C%20I%20need%20a%202020%20Chevy%20Silverado%203500%20Transmission%20quote.%20VIN%3A%20\" class=\"aps-cta-primary\"\u003eText Your VIN — Match Options\u003c\/a\u003e\u003ca href=\"#aps-products\" class=\"aps-cta-primary\"\u003e↓ Browse all 3 units\u003c\/a\u003e\u003cspan class=\"aps-tertiary-wrap\"\u003eor call \u003ca href=\"tel:+18773138995\"\u003e1-877-313-8995\u003c\/a\u003e · 24h Mon-Sat\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aps-trust-row\"\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv style=\"font-size:14px;color:#082e3d;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-weight:600;color:#082e3d;font-size:12px;margin-top:2px;\"\u003eUp to 3-Year Warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv style=\"font-size:14px;color:#082e3d;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-weight:600;color:#082e3d;font-size:12px;margin-top:2px;\"\u003ePhotos Before Shipment\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv style=\"font-size:14px;color:#082e3d;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-weight:600;color:#082e3d;font-size:12px;margin-top:2px;\"\u003eShift-Tested \u0026amp; Verified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv style=\"font-size:14px;color:#082e3d;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-weight:600;color:#082e3d;font-size:12px;margin-top:2px;\"\u003eFree Nationwide Shipping\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv style=\"font-size:14px;color:#082e3d;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-weight:600;color:#082e3d;font-size:12px;margin-top:2px;\"\u003e30-Day Money-Back\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv style=\"font-size:14px;color:#082e3d;\"\u003e●\u003c\/div\u003e\n\u003cdiv style=\"font-weight:600;color:#082e3d;font-size:12px;margin-top:2px;\"\u003eSecure SSL Checkout\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aps-section\" style=\"padding-top:24px;\"\u003e\n\u003cdiv style=\"margin-bottom:32px;\"\u003e\n\u003ch2 class=\"aps-h2\"\u003e2020 Silverado 3500 Transmission Fitments In Stock\u003c\/h2\u003e\n\u003cp style=\"font-size:16px;color:#2a3441;margin:0 0 18px;line-height:1.75;\"\u003eEvery 2020 Silverado 3500 transmission we hold, one card per build. All three share a displacement and a gearbox type, so what separates them is what the truck burns and how many wheels it drives. Pick the card that reads like your truck, then let the VIN confirm it at the order step.\u003c\/p\u003e\n\u003cdiv class=\"aps-grid-6\"\u003e\n\u003ca class=\"aps-model-card\" href=\"#aps-products\"\u003e\u003cdiv class=\"model-name\"\u003e6.6L gasoline — 4x2\u003c\/div\u003e\n\u003cdiv class=\"model-desc\"\u003eThe gasoline truck driving two wheels. It shares its litres with the diesel further along this page and almost nothing else that matters to a gearbox.\u003c\/div\u003e\u003c\/a\u003e\n\u003ca class=\"aps-model-card\" href=\"#aps-products\"\u003e\u003cdiv class=\"model-name\"\u003e6.6L gasoline — 4x4\u003c\/div\u003e\n\u003cdiv class=\"model-desc\"\u003eThe gasoline truck driving four. It separates from the 4x2 above at the output and the transfer interface, which is why the two are ordered as different parts.\u003c\/div\u003e\u003c\/a\u003e\n\u003ca class=\"aps-model-card\" href=\"#aps-products\"\u003e\u003cdiv class=\"model-name\"\u003e6.6L diesel — 4x4, opt MGM (ID OMKF)\u003c\/div\u003e\n\u003cdiv class=\"model-desc\"\u003eThe diesel, four-wheel drive, listed with option code MGM and unit ID OMKF. On this one the codes are the match — not the litres, and not the model year.\u003c\/div\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:15px;color:#5a6470;margin:16px 0 0;line-height:1.75;\"\u003eLooking for a diesel 4x2? We stock the gasoline truck in both drivetrains, but the diesel only in 4x4 today — \u003ca href=\"sms:+13074415554?\u0026amp;body=2020%20Chevy%20Silverado%203500%20transmission%20%E2%80%94%20please%20verify%20my%20VIN\" style=\"color:#082e3d;font-weight:700;\"\u003etext us the VIN\u003c\/a\u003e and we will source the right one rather than ship you a box that bolts up and fails. Need the other half of the job? \u003ca href=\"\/collections\/2020-used-chevy-silverado-3500-engines-for-sale\" style=\"color:#082e3d;font-weight:700;\"\u003e2020 Chevy Silverado 3500 engines\u003c\/a\u003e are listed separately, or go back up to \u003ca href=\"\/collections\/2020-used-chevy-transmissions-for-sale\" style=\"color:#082e3d;font-weight:700;\"\u003eall 2020 Chevy transmissions\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:32px;\"\u003e\n\u003ch2 class=\"aps-h2\"\u003eWhy Buy a 2020 Chevy Silverado 3500 Transmission from Auto Power Source\u003c\/h2\u003e\n\u003cp style=\"font-size:16px;color:#2a3441;margin:0 0 14px;line-height:1.8;\"\u003eEach transmission here was pulled from a low-mileage 2020 Silverado 3500 donor, logged against that truck's VIN on arrival, and stored indoors in a climate-controlled warehouse instead of a yard. Nothing on this page has been rebuilt or reshelled — it is original Chevy hardware, sold as what it is. Before a unit is listed, our ASE-certified technicians cycle it through every gear and then drive it with weight behind it, because a transmission out of a working truck can pass a no-load bench check and still be finished.\u003c\/p\u003e\n\u003cp style=\"font-size:16px;color:#2a3441;margin:0;line-height:1.8;\"\u003eOne detail on this page is worth more than it looks: every 2020 Silverado 3500 unit we list carries the \u003cstrong\u003e2001-Up\u003c\/strong\u003e span, where our 1500 and 2500 listings run from 1999. That is the interchange family the part belongs to, and it is the sort of thing a cross-reference table gets wrong at two in the morning. After that, the order is simple. Fuel first — two of these trucks are gasoline, one is diesel, and no amount of matching litres makes those gearboxes interchangeable. Drivetrain second: gasoline in 4x2 or 4x4, diesel in 4x4 only. \u003ca href=\"sms:+13074415554?\u0026amp;body=2020%20Chevy%20Silverado%203500%20transmission%20%E2%80%94%20please%20verify%20my%20VIN\" style=\"color:#082e3d;font-weight:700;\"\u003eText us the VIN\u003c\/a\u003e and we will name which of the three is yours — or tell you honestly that it is one we have to source.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aps-cta-bar\"\u003e\n\u003cspan class=\"aps-cta-bar-text\"\u003e📱 Fastest way to match: text us your VIN, get options in minutes.\u003c\/span\u003e\u003ca href=\"sms:+13074415554?\u0026amp;body=Hi%2C%20I%20need%20a%202020%20Chevy%20Silverado%203500%20Transmission%20quote.%20VIN%3A%20\"\u003eText Your VIN →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:32px;\"\u003e\n\u003ch2 class=\"aps-h2\"\u003eYour 2020 Silverado 3500 Transmission Options: Compared\u003c\/h2\u003e\n\u003cp style=\"font-size:16px;color:#2a3441;margin:0 0 16px;line-height:1.75;\"\u003eWhen the transmission goes on a 2020 Silverado 3500, there are four routes open to you. The honest comparison:\u003c\/p\u003e\n\u003cdiv class=\"aps-compare-hint\"\u003e← Swipe sideways to see all columns →\u003c\/div\u003e\n\u003cdiv class=\"aps-compare-wrap\"\u003e\u003ctable class=\"aps-compare-table\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#082e3d;color:#fff;\"\u003e\n\u003cth style=\"text-align:left;\"\u003eOption\u003c\/th\u003e\n\u003cth style=\"text-align:center;\"\u003eCost\u003c\/th\u003e\n\u003cth style=\"text-align:center;\"\u003eReliability\u003c\/th\u003e\n\u003cth style=\"text-align:center;\"\u003eWarranty\u003c\/th\u003e\n\u003cth style=\"text-align:center;\"\u003eFitment Match\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom:.5px solid #B5BFC8;background:#ECEEF1;\"\u003e\n\u003ctd style=\"font-weight:700;color:#082e3d;\"\u003eUsed OEM (this collection)\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#082e3d;font-weight:700;\"\u003e$$$ Best Value\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#082e3d;font-weight:700;\"\u003eHigh\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#082e3d;font-weight:700;\"\u003eUp to 3 years\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#082e3d;font-weight:700;\"\u003eVIN-matched\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:.5px solid #B5BFC8;\"\u003e\n\u003ctd style=\"font-weight:700;color:#082e3d;\"\u003eNew OEM (dealer)\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003e$$$$$ 2-4× more\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003eHigh\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003eExact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom:.5px solid #B5BFC8;\"\u003e\n\u003ctd style=\"font-weight:700;color:#082e3d;\"\u003eAftermarket \/ Reman\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003e$$$$\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003eVaries\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003e6-12 mo\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003eMay adapt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"font-weight:700;color:#082e3d;\"\u003eJunkyard\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003e$ Cheapest\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003eUnknown\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003eNone\u003c\/td\u003e\n\u003ctd style=\"text-align:center;color:#5a6470;\"\u003eDIY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp style=\"font-size:14px;color:#5a6470;margin:14px 0 0;font-style:italic;\"\u003eTested used OEM is where the value sits — factory hardware with a real warranty attached, without the dealer markup on a new-in-box unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:32px;background:#ECEEF1;border:.5px solid #B5BFC8;border-left:3px solid #082e3d;border-radius:6px;padding:28px 24px;\"\u003e\n\u003ch2 style=\"font-size:24px;font-weight:700;color:#082e3d;margin:0 0 14px;\"\u003e2020 Silverado 3500 Transmission Buying Guide\u003c\/h2\u003e\n\u003col style=\"font-size:15px;color:#2a3441;margin:0;padding-left:22px;line-height:1.8;\"\u003e\n\u003cli style=\"margin-bottom:10px;\"\u003e\n\u003cstrong style=\"color:#082e3d;\"\u003eCheck the span before the specs.\u003c\/strong\u003e Our 2020 Silverado 3500 transmissions are listed on the 2001-Up span, while the 1500 and 2500 pages run from 1999. If you are working off a generic interchange chart, confirm you are reading the 3500 column and not the row above it.\u003c\/li\u003e\n\u003cli style=\"margin-bottom:10px;\"\u003e\n\u003cstrong style=\"color:#082e3d;\"\u003eThen settle fuel — it decides everything downstream.\u003c\/strong\u003e Gasoline or diesel is the real first cut here. Both are 6.6L, so litres will not tell them apart; on most other 2020 Chevys displacement does that work, and on this truck it does none of it.\u003c\/li\u003e\n\u003cli style=\"margin-bottom:10px;\"\u003e\n\u003cstrong style=\"color:#082e3d;\"\u003eThen 4x2 versus 4x4.\u003c\/strong\u003e We hold the gasoline truck in both, and the diesel in 4x4 only. A 4x2 unit and a 4x4 unit differ at the output and the transfer interface — matching the engine perfectly does not make them the same part.\u003c\/li\u003e\n\u003cli style=\"margin-bottom:10px;\"\u003e\n\u003cstrong style=\"color:#082e3d;\"\u003eOn the diesel, order from the option code.\u003c\/strong\u003e Our diesel listing carries opt MGM and ID OMKF. These trucks were built to order, and the codes — not the trim badge, not the model year — are what confirm the match.\u003c\/li\u003e\n\u003cli style=\"margin-bottom:10px;\"\u003e\n\u003cstrong style=\"color:#082e3d;\"\u003eAsk for the donor VIN.\u003c\/strong\u003e We release it on request for any Silverado 3500 transmission in stock, so you can check mileage and history for yourself instead of taking our word for it.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp style=\"font-size:14px;color:#5a6470;margin:14px 0 0;font-style:italic;\"\u003eOur ASE-certified technicians verify every one of these points against your VIN before any transmission ships.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aps-cta-bar\"\u003e\n\u003cspan class=\"aps-cta-bar-text\"\u003e📞 Not sure whether your 3500 left the line gasoline or diesel? Talk to our team live, 24h Mon-Sat.\u003c\/span\u003e\u003ca href=\"tel:+18773138995\"\u003eCall 1-877-313-8995\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:32px;\"\u003e\n\u003ch2 class=\"aps-h2\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv style=\"display:flex;flex-direction:column;gap:12px;\"\u003e\n\u003cdetails class=\"aps-faq\"\u003e\u003csummary\u003eWhat is the warranty on a 2020 Silverado 3500 transmission?\u003c\/summary\u003e\u003cdiv\u003eUp to 3 years, depending on the specific unit. The exact term is shown on each product page.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aps-faq\"\u003e\u003csummary\u003eWhat does shift-tested mean?\u003c\/summary\u003e\u003cdiv\u003eASE-certified technicians run the unit through its full gear range under load and check for slip, flare and harsh engagement before it is cleared for sale.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aps-faq\"\u003e\u003csummary\u003eHow long until delivery?\u003c\/summary\u003e\u003cdiv\u003ePrep and ship time is \u003cstrong\u003e3-5 business days\u003c\/strong\u003e. Transit time is \u003cstrong\u003e2-3 business days\u003c\/strong\u003e via freight carrier after dispatch.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aps-faq\"\u003e\u003csummary\u003eCan I see photos before I buy?\u003c\/summary\u003e\u003cdiv\u003eYes. Multi-angle photos of the actual unit are sent before payment.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aps-faq\"\u003e\u003csummary\u003eDo I need my VIN?\u003c\/summary\u003e\u003cdiv\u003eOn this truck, effectively yes. All three units are 6.6L automatics, so displacement cannot separate them — the VIN is what settles gasoline versus diesel and 4x2 versus 4x4, and it is the only thing we will match your order against.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aps-faq\"\u003e\u003csummary\u003eWhat if I do not approve the photos?\u003c\/summary\u003e\u003cdiv\u003eEvery dollar back — no restocking fees, no return freight charges.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aps-faq\"\u003e\u003csummary\u003eWhy is this cheaper than a dealer replacement?\u003c\/summary\u003e\u003cdiv\u003eIt is used OEM out of a low-mileage donor Silverado 3500 — the same Chevy engineering, minus the new-part markup.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aps-faq\"\u003e\u003csummary\u003eWhen can I reach customer service?\u003c\/summary\u003e\u003cdiv\u003e24 hours a day, Monday through Saturday.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:8px;\"\u003e\n\u003ch2 class=\"aps-h2\"\u003eRelated Collections\u003c\/h2\u003e\n\u003cdiv class=\"aps-grid-4\"\u003e\n\u003ca href=\"\/collections\/2020-used-chevy-transmissions-for-sale\" class=\"aps-related-link primary\"\u003e← All 2020 Chevy Transmissions\u003c\/a\u003e\n\u003ca href=\"\/collections\/2020-used-chevy-silverado-3500-engines-for-sale\" class=\"aps-related-link secondary\"\u003e2020 Silverado 3500 Engines\u003c\/a\u003e\n\u003ca href=\"\/collections\/used-chevy-transmissions-for-sale\" class=\"aps-related-link secondary\"\u003eAll Chevy Transmissions\u003c\/a\u003e\n\u003ca href=\"\/collections\/used-engines-and-transmissions\" class=\"aps-related-link secondary\"\u003eAll Engines \u0026amp; Transmissions\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"aps-about-block\"\u003e\n\u003cdiv class=\"aps-section\" style=\"background:#C8CFD6;\"\u003e\n\u003cdiv style=\"margin-bottom:24px;background:#082e3d;padding:24px;border-radius:8px;\"\u003e\n\u003cdiv class=\"aps-grid-4\"\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv style=\"font-size:32px;font-weight:700;color:#fff;letter-spacing:-.5px;\"\u003e46,000+\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px;color:#a8bdc7;text-transform:uppercase;letter-spacing:.7px;margin-top:6px;font-weight:600;\"\u003eengines + transmissions shipped\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv style=\"font-size:32px;font-weight:700;color:#fff;letter-spacing:-.5px;\"\u003e0%\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px;color:#a8bdc7;text-transform:uppercase;letter-spacing:.7px;margin-top:6px;font-weight:600;\"\u003efitment-related returns\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv style=\"font-size:32px;font-weight:700;color:#fff;letter-spacing:-.5px;\"\u003eAll 50\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px;color:#a8bdc7;text-transform:uppercase;letter-spacing:.7px;margin-top:6px;font-weight:600;\"\u003estates covered, free freight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align:center;\"\u003e\n\u003cdiv style=\"font-size:21px;font-weight:700;color:#fff;line-height:1.35;\"\u003eExcellent\u003cbr\u003eCustomer Reviews\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px;color:#a8bdc7;text-transform:uppercase;letter-spacing:.7px;margin-top:6px;font-weight:600;\"\u003erated on Trustpilot\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:24px;background:#fff;padding:28px 24px;border-radius:8px;border:.5px solid #B5BFC8;\"\u003e\n\u003ch2 style=\"font-size:28px;font-weight:700;color:#082e3d;margin:0 0 16px;border-bottom:2px solid #082e3d;padding-bottom:8px;display:inline-block;\"\u003eOur 6-Step Inspection \u0026amp; Shipping Process\u003c\/h2\u003e\n\u003cp style=\"font-size:15px;margin:0 0 18px;color:#2a3441;line-height:1.75;\"\u003eNo 2020 Silverado 3500 transmission reaches this page until it has cleared all six:\u003c\/p\u003e\n\u003cdiv class=\"aps-grid-6\"\u003e\n\u003cdiv style=\"background:#DADEE2;padding:16px;border-radius:6px;border-top:2px solid #082e3d;\"\u003e\n\u003cstrong style=\"color:#082e3d;font-size:16px;\"\u003e1. VIN-Matching\u003c\/strong\u003e\u003cdiv style=\"font-size:14px;color:#2a3441;margin-top:4px;line-height:1.7;\"\u003eYour VIN answers the two questions this listing turns on: gasoline or diesel, and 4x2 or 4x4. We read it rather than guess it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#DADEE2;padding:16px;border-radius:6px;border-top:2px solid #082e3d;\"\u003e\n\u003cstrong style=\"color:#082e3d;font-size:16px;\"\u003e2. Tested \u0026amp; Verified\u003c\/strong\u003e\u003cdiv style=\"font-size:14px;color:#2a3441;margin-top:4px;line-height:1.7;\"\u003eASE-certified technicians shift-test the unit through every gear, watching for slip, flare and harsh engagement.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#DADEE2;padding:16px;border-radius:6px;border-top:2px solid #082e3d;\"\u003e\n\u003cstrong style=\"color:#082e3d;font-size:16px;\"\u003e3. Shift \u0026amp; Road Verification\u003c\/strong\u003e\u003cdiv style=\"font-size:14px;color:#2a3441;margin-top:4px;line-height:1.7;\"\u003eDriven under load, not idled on a bench. A worn converter stays polite at no-load and only tells the truth with weight behind it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#DADEE2;padding:16px;border-radius:6px;border-top:2px solid #082e3d;\"\u003e\n\u003cstrong style=\"color:#082e3d;font-size:16px;\"\u003e4. Visual Inspection\u003c\/strong\u003e\u003cdiv style=\"font-size:14px;color:#2a3441;margin-top:4px;line-height:1.7;\"\u003eCase, bellhousing, pan, cooler lines, harness connectors and every mounting point go under the light.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#DADEE2;padding:16px;border-radius:6px;border-top:2px solid #082e3d;\"\u003e\n\u003cstrong style=\"color:#082e3d;font-size:16px;\"\u003e5. Photograph \u0026amp; Catalog\u003c\/strong\u003e\u003cdiv style=\"font-size:14px;color:#2a3441;margin-top:4px;line-height:1.7;\"\u003eMulti-angle photos reach your inbox BEFORE the freight is booked. Your approval is what moves the pallet.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#DADEE2;padding:16px;border-radius:6px;border-top:2px solid #082e3d;\"\u003e\n\u003cstrong style=\"color:#082e3d;font-size:16px;\"\u003e6. Palletize \u0026amp; Ship\u003c\/strong\u003e\u003cdiv style=\"font-size:14px;color:#2a3441;margin-top:4px;line-height:1.7;\"\u003eStrapped to a heavy-duty wooden pallet and freighted to your door at no charge.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:0;\"\u003e\n\u003ch2 style=\"font-size:28px;font-weight:700;color:#082e3d;margin:0 0 12px;border-bottom:2px solid #082e3d;padding-bottom:8px;display:inline-block;\"\u003eWhat Our Customers Say\u003c\/h2\u003e\n\u003cp style=\"font-size:15px;color:#5a6470;margin:0 0 16px;\"\u003e\u003cstrong style=\"color:#082e3d;\"\u003eRated Excellent by our customers on \u003ca href=\"https:\/\/www.trustpilot.com\/review\/autopowersource.com\" target=\"_blank\" rel=\"noopener\" style=\"color:#082e3d!important;\"\u003eTrustpilot\u003c\/a\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"aps-grid-4\"\u003e\n\u003cdiv style=\"background:#fff;border:.5px solid #B5BFC8;border-radius:8px;padding:18px;border-top:3px solid #082e3d;\"\u003e\n\u003cdiv style=\"color:#a17a1a;font-size:14px;margin-bottom:8px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cdiv style=\"font-weight:700;color:#082e3d;font-size:17px;margin-bottom:6px;\"\u003eTransaction was perfect\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#2a3441;line-height:1.7;\"\u003e\"Found me the right engine at a great price. Got it in 2 days and installed the car the next day. Runs absolutely beautiful.\"\u003c\/div\u003e\n\u003cdiv style=\"margin-top:10px;font-size:12px;color:#5a6470;\"\u003e— Kevin Graham, 2026-04-29\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border:.5px solid #B5BFC8;border-radius:8px;padding:18px;border-top:3px solid #082e3d;\"\u003e\n\u003cdiv style=\"color:#a17a1a;font-size:14px;margin-bottom:8px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cdiv style=\"font-weight:700;color:#082e3d;font-size:17px;margin-bottom:6px;\"\u003eRepeat customer\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#2a3441;line-height:1.7;\"\u003e\"AutoPowerSource is a great company. I've used them several times for used motors. Low mileage when other companies gave up.\"\u003c\/div\u003e\n\u003cdiv style=\"margin-top:10px;font-size:12px;color:#5a6470;\"\u003e— Curtis Haines, 2025-12-23\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border:.5px solid #B5BFC8;border-radius:8px;padding:18px;border-top:3px solid #082e3d;\"\u003e\n\u003cdiv style=\"color:#a17a1a;font-size:14px;margin-bottom:8px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cdiv style=\"font-weight:700;color:#082e3d;font-size:17px;margin-bottom:6px;\"\u003eHighly recommend Mike\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#2a3441;line-height:1.7;\"\u003e\"Mike reached out first thing in the morning regarding my inquiry for a used engine. Very informative and helpful.\"\u003c\/div\u003e\n\u003cdiv style=\"margin-top:10px;font-size:12px;color:#5a6470;\"\u003e— Beatrice, 2026-03-31\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border:.5px solid #B5BFC8;border-radius:8px;padding:18px;border-top:3px solid #082e3d;\"\u003e\n\u003cdiv style=\"color:#a17a1a;font-size:14px;margin-bottom:8px;\"\u003e★★★★★\u003c\/div\u003e\n\u003cdiv style=\"font-weight:700;color:#082e3d;font-size:17px;margin-bottom:6px;\"\u003eGreat experience\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#2a3441;line-height:1.7;\"\u003e\"Daisy kept me in the loop every step. My original engine was damaged before shipping; she found a different one quickly.\"\u003c\/div\u003e\n\u003cdiv style=\"margin-top:10px;font-size:12px;color:#5a6470;\"\u003e— Bryan Perkins, 2026-03-25\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#082e3d;color:#fff;padding:28px 32px;\"\u003e\n\u003ch2 style=\"font-size:28px;font-weight:700;color:#fff;margin:0 0 14px;\"\u003eOur Photos-Before-Shipment Guarantee\u003c\/h2\u003e\n\u003cp style=\"font-size:16px;margin:0 0 16px;color:#d4e1e8;line-height:1.8;max-width:820px;\"\u003eBefore any 2020 Silverado 3500 transmission leaves our warehouse, we send you multi-angle photographs. You approve. If you do not approve, you get every dollar back — no questions, no restocking fees, no return freight charges. That sits on top of 30-day money-back and up to a 3-year warranty.\u003c\/p\u003e\n\u003ca href=\"mailto:info@autopowersource.com?subject=2020%20Chevy%20Silverado%203500%20Transmission%20Inquiry\" style=\"display:inline-block;background:#fff;color:#082e3d!important;padding:13px 26px;border-radius:6px;font-weight:700;font-size:15px;text-decoration:none;\"\u003e✉ Email Us at info@autopowersource.com\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","products":[{"product_id":"2020-chevy-truck-silverado-3500-2001-up-used-transmission-at-6-6l-gasoline-4x4-1","title":"2020 Chevy Truck-Silverado 3500 (2001 Up) Used Transmission (AT, 6.6L), gasoline, 4x4","description":"\u003cp\u003eThe \u003cstrong\u003e2020 Chevy Truck-Silverado 3500 (2001 Up) Used Transmission (AT, 6.6L), gasoline, 4x4\u003c\/strong\u003e is professionally inspected, tested, and ready to install. Every unit is VIN-verified for correct fitment and backed by our 30-Day 100% Money Back Guarantee.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eYear:\u003c\/strong\u003e 2020\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMake:\u003c\/strong\u003e Chevrolet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Silverado 3500\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Used Transmission\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Size:\u003c\/strong\u003e 6.6L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Type:\u003c\/strong\u003e Gasoline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain:\u003c\/strong\u003e 4x4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission Type:\u003c\/strong\u003e Automatic\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThis used transmission fits the 2020 Chevrolet Silverado 3500 with the 6.6L Gasoline engine. Compatibility can vary by trim and build date — confirm fitment with your VIN, or contact us and we'll verify it for you.\u003c\/p\u003e\u003ch3\u003eWhat's Included \u0026amp; Condition\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGenuine OEM used transmission, tested and verified complete\u003c\/li\u003e\n\u003cli\u003ePhotos of the actual unit sent for your approval before shipping\u003c\/li\u003e\n\u003cli\u003eLow-mileage, professionally inspected inventory\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty, Shipping \u0026amp; Returns\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e6-month warranty included — extended coverage up to 3 years available\u003c\/li\u003e\n\u003cli\u003eFree, fast nationwide shipping\u003c\/li\u003e\n\u003cli\u003e30-day hassle-free returns\u003c\/li\u003e\n\u003cli\u003e30-Day 100% Money Back Guarantee\u003c\/li\u003e\n\u003cli\u003eVIN-verified fitment guarantee\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Chevrolet","offers":[{"title":"Tested and complete \/ 93,792 miles driven \/ 6 Months warranty","offer_id":45998626472109,"sku":"APST_4138","price":3562.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0712\/8668\/5869\/files\/chevy-6l80-transmission-tested-certified.png?v=1780393068"},{"product_id":"2020-chevy-truck-silverado-3500-2001-up-used-transmission-at-6-6l-gasoline-4x2-1","title":"2020 Chevy Truck-Silverado 3500 (2001 Up) Used Transmission (AT, 6.6L), gasoline, 4x2","description":"\u003cp\u003eThe \u003cstrong\u003e2020 Chevy Truck-Silverado 3500 (2001 Up) Used Transmission (AT, 6.6L), gasoline, 4x2\u003c\/strong\u003e is professionally inspected, tested, and ready to install. Every unit is VIN-verified for correct fitment and backed by our 30-Day 100% Money Back Guarantee.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eYear:\u003c\/strong\u003e 2020\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMake:\u003c\/strong\u003e Chevrolet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Silverado 3500\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Used Transmission\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Size:\u003c\/strong\u003e 6.6L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Type:\u003c\/strong\u003e Gasoline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivetrain:\u003c\/strong\u003e 4x2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission Type:\u003c\/strong\u003e Automatic\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThis used transmission fits the 2020 Chevrolet Silverado 3500 with the 6.6L Gasoline engine. 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