45
verified 2006 gmc engines
2006 Used GMC Engines For Sale
45 verified 2006 GMC engines in stock — Sierra 1500, HD 2500/3500 & Denali (4.8L LR4, 5.3L L59/LM7/L33, 6.0L LQ4/LQ9, 6.6L LBZ/LLY Duramax, 8.1L Vortec 8100 big-block), Yukon & Yukon XL (4.8L, 5.3L, 6.0L, 8.1L), Canyon (2.8L LK5 four / 3.5L L52 inline-five), Envoy & Envoy XL (4.2L LL8 inline-six / 5.3L V8), Suburban, and Savana vans. Every 2006 GMC is a GMT800-platform truck — VIN-matched to your vehicle, compression-tested by certified technicians, photographed before shipment, backed by up to a 3-year warranty plus 30-day money-back. Free freight nationwide.
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Compression-Tested & Verified
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Free Nationwide Shipping
Browse 2006 GMC Engines by Model
Pick your 2006 GMC model to see exact fitments in stock. 2006 is a pure GMT800-platform year, and the 8th VIN digit decides the engine code — the 5.3L and 6.0L small-blocks each come in several variants. Not sure which one fits? Text us your VIN and a specialist confirms the match.
2006 Sierra 1500
GMT800 half-ton: 4.3L LU3 V6 (VIN X), 4.8L LR4 (VIN V), 5.3L L59 (VIN Z) / LM7 (VIN T) / aluminum L33 (VIN B), and 6.0L LQ4 (VIN U) gas plus LQ9 (VIN N) high-output. Match the 8th VIN digit.
2006 Sierra Denali 1500
The premium AWD half-ton — 6.0L LQ9 (VIN N) high-output small-block. Not interchangeable with a standard 5.3L or 6.0L LQ4 Sierra unit.
2006 Sierra HD 2500 / 3500
Heavy-duty: 6.0L LQ4 (VIN U) gas, the 8.1L Vortec 8100 big-block (VIN G), and the 6.6L Duramax turbodiesel — early LLY (VIN 2) and late LBZ (VIN D). Confirm gas vs Duramax.
2006 Yukon & Yukon XL
GMT800 SUV: 4.8L LR4 (VIN V), 5.3L L59 (VIN Z) / LM7 (VIN T), 6.0L LQ4 (VIN U); XL2500 adds the 8.1L Vortec 8100 (VIN G). VIN-matched and compression-tested.
2006 Canyon
Midsize pickup: 2.8L LK5 four-cylinder (VIN 8) and 3.5L L52 inline-five (VIN 6). Match displacement to your VIN.
2006 Envoy & Envoy XL
Midsize SUV: 4.2L LL8 Atlas inline-six (VIN S) and 5.3L V8 (VIN M). The six and the V8 share nothing.
2006 Suburban
1500: 5.3L L59 (VIN Z) / LM7 (VIN T), 6.0L LQ4 (VIN U). 2500: 6.0L LQ4 (VIN U), 8.1L Vortec 8100 (VIN G). VIN-matched to your body style.
2006 Savana Van
1500: 4.3L LU3 (VIN X), 5.3L LM7 (VIN T). 2500 / 3500: 4.8L LR4 (VIN V), 6.0L LQ4 (VIN U) gas, 6.6L LLY Duramax (VIN 2). Cargo and passenger fitments.
Why Buy a 2006 GMC Engine from Auto Power Source
Every 2006 GMC engine in our inventory is pulled from an inventory-verified donor vehicle, cataloged by VIN, and held in our warehouse pending sale. Each unit goes through our six-step inspection — VIN-matching, compression testing, noise & smoke verification, full visual inspection, multi-angle photography, and palletized shipping. 2006 is a pure GMT800-platform year, so from the 4.8L LR4 and the 5.3L small-blocks to the 8.1L Vortec 8100 big-block and the 6.6L LLY/LBZ Duramax, we match the engine code and truck family to your vehicle before anything ships.
Our certified technicians compression-test every cylinder and run a leak-down evaluation before any 2006 GMC engine is cleared for sale. You pay a fraction of dealer-new pricing for the same GM engineering, ship free on a heavy-duty pallet anywhere in the continental U.S., and get up to a 3-year warranty plus 30-day money-back. Not sure whether your truck runs the iron 5.3L L59 / LM7 or the aluminum-block L33? Text your VIN and we will confirm.
📱 Fastest way to match: text us your VIN, get options in minutes.Text Your VIN →
Your 2006 GMC Engine Options: Compared
Most 2006 GMC owners face four real choices when their engine fails:
← Swipe sideways to see all columns →
| Option |
Cost |
Reliability |
Warranty |
Fitment Match |
| Used OEM (this collection) |
$$$ Best Value |
High |
Up to 3 years |
VIN-matched |
| New OEM (dealer) |
$$$$$ 2-4× more |
High |
Manufacturer |
Exact |
| Aftermarket / Reman |
$$$$ |
Varies |
6-12 mo |
May adapt |
| Junkyard |
$ Cheapest |
Unknown |
None |
DIY |
Tested used OEM hits the sweet spot — same GM engineering as new, fraction of the cost.
2006 GMC Engine Buying Guide
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Read the 8th VIN digit. On a 2006 GMC the 5.3L alone splits into L59 (VIN Z), LM7 (VIN T) and the aluminum-block L33 (VIN B) — same displacement, different engine code and block material.
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Gas vs Duramax on 2500/3500. Sierra HD, Suburban 2500 and Savana 2500/3500 ship with the 6.0L LQ4 gas V8, the 8.1L Vortec 8100 big-block (VIN G), or the 6.6L Duramax turbodiesel — early LLY (VIN 2) and late LBZ (VIN D). These are completely different engines.
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Watch the high-output 6.0L. The 2006 Sierra Denali runs the 6.0L LQ9 (VIN N) high-output small-block — it does not swap with the standard 6.0L LQ4 (VIN U) or any 5.3L unit.
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Match the truck family and tonnage. A 1500 5.3L is a different install than a 2500 6.0L. Confirm Sierra vs Yukon vs Suburban vs Savana and the 1500 / 2500 / 3500 tonnage before ordering.
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Always run the donor VIN if available. We provide it on request for any engine in our inventory to verify mileage and history.
Our ASE-certified technicians verify every one of these points against your VIN before any engine ships.
Frequently Asked Questions
What is the warranty on a 2006 GMC engine?
Up to 3 years, depending on the specific unit. The exact warranty term is listed on each product page.
What does compression-tested mean?
Our certified technicians compression-test every cylinder and run a leak-down evaluation before the engine is cleared for sale.
How long until delivery?
Prep and ship time is 3-5 business days. Transit time is 2-3 business days via freight carrier after dispatch.
Can I see photos before I buy?
Yes. Multi-angle photos of the actual unit are sent before payment.
Do I need my VIN?
Strongly recommended. 2006 GMC engines vary by engine code, truck family, tonnage (1500/2500/3500), and drivetrain — the 8th VIN digit confirms the exact match.
What if I do not approve the photos?
Every dollar back — no restocking fees, no return freight charges.
Why is a used OEM engine cheaper than the dealer?
You get the same GM engineering from a verified donor unit at a fraction of dealer-new pricing, with free freight and up to a 3-year warranty.
When can I reach customer service?
Our team is available 24 hours a day, Monday through Saturday, by phone at 1-877-313-8995 or by text.
46,000+
engines + transmissions shipped
0%
fitment-related returns
All 50
states covered, free freight
Excellent
Customer Reviews
rated on Trustpilot
Our 6-Step Inspection & Shipping Process
Every 2006 GMC engine we ship has been through these six steps:
1. VIN-MatchingWe match the donor VIN to your VIN to confirm engine code, emissions calibration, and drivetrain fit.
2. Tested & VerifiedCertified technicians compression-test every cylinder and run a leak-down evaluation on each engine.
3. Noise & Smoke VerificationUnits are run to verify normal mechanical sound and clean operation — catches wear static tests miss.
4. Visual InspectionEvery accessible component is inspected: manifolds, valve covers, accessories, sensor harnesses, turbo on Duramax units.
5. Photograph & CatalogMulti-angle photos sent to you BEFORE we ship, for your approval.
6. Palletize & ShipStrapped on a heavy-duty wooden pallet, shipped via freight at no charge.
What Our Customers Say
Rated Excellent by our customers on Trustpilot.
★★★★★
Transaction was perfect
"Found me the right engine at a great price. Got it in 2 days and installed the car the next day. Runs absolutely beautiful."
— Kevin Graham, 2026-04-29
★★★★★
Repeat customer
"AutoPowerSource is a great company. I've used them several times for used motors. Low mileage when other companies gave up."
— Curtis Haines, 2025-12-23
★★★★★
Highly recommend Mike
"Mike reached out first thing in the morning regarding my inquiry for a used engine. Very informative and helpful."
— Beatrice, 2026-03-31
★★★★★
Great experience
"Daisy kept me in the loop every step. My original engine was damaged before shipping; she found a different one quickly."
— Bryan Perkins, 2026-03-25
Our Photos-Before-Shipment Guarantee
Before any 2006 GMC engine 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. On top of 30-day money-back and up to a 3-year warranty.
✉ Email Us at info@autopowersource.com
