2000 Used GMC Transmissions For Sale

133
verified 2000 GMC transmissions
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2000 Used GMC Transmissions For Sale

133 tested 2000 GMC transmissions, sorted the way GM built them — by RPO option code. 2000 is the overlap year: the all-new GMT800 Sierra 1500 and Sierra 2500 were sold beside the carryover Classic-body C/K 2500 and 3500 heavy-duty pickups, and the two generations share almost nothing. Text your VIN and we confirm the exact unit in writing.

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Warranty On Every Unit
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ASE-Tested & Verified
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2000 GMC Transmission Families

Which gearbox sits behind which 2000 GMC, and how many of each we hold today.

Transmission family Fits (2000) In stock
NV4500 — C/K 2500 and 3500 Manual (Classic Body) C2500, K2500, C3500, C3500HD and K3500 five-speed manual — 5.7L and 7.4L gas, 6.5L diesel, 4x2 and 4x4 32
4L80E — C3500 / C3500HD / K3500 Automatic (Classic Body) One-ton Classic-body pickups and chassis cabs — 5.7L, 7.4L Vortec and 6.5L Turbo Diesel, 3500 HD and Exc. 3500 HD splits 24
4L60E — Half-Ton Automatics Sierra 1500 (4.3L, 4.8L, 5.3L), Sierra 2500 5.3L, Yukon (incl. the 5.7L Denali) and Yukon XL 1500 14
NV3500 — Compact, Mid-Size and Half-Ton Manual Blazer, Jimmy, S10 and Sonoma five-speed on the 4.3L (incl. ZR2 and Exc. ZR2), plus the half-ton Sierra 1500 manual 14
4L80E (Opt MT1) — C2500 / K2500 Automatic Three-quarter-ton Classic-body pickups — the titles name the 4L80E and Opt MT1 outright, on 5.7L, 7.4L and 6.5L diesel 12
4L60E — Compact and Mid-Size Automatics Blazer, Jimmy, S10 (2.2L and 4.3L), Sonoma, Safari (RWD and AWD) and the final-year Envoy 11
4L80E (Opt MT1) — Savana 1500 / 2500 / 3500 Heavy-rated vans on 4.3L, 5.7L, 6.5L diesel and 7.4L — the option code in the title is what separates them from the M30 vans 9
4L60E (Opt M30) — Savana 1500 / 2500 / 3500 Light-rated vans on 4.3L, 5.0L and 5.7L — same body, same displacements, different gearbox 8
4L80E — Sierra 2500 6.0L Automatic (New GMT800 Body) The all-new 2500 on the 6.0L Vortec, two of them listed by 4L80E case ID (MCP, MJP) 3
4L80E — Yukon XL 2500 The three-quarter-ton Yukon XL in its first model year, 4x2 and 4x4 — not interchangeable with the XL 1500 2
NV4500 / ZF S6-650 — Sierra 2500 6.0L Manual — VIN settles which Two manual 6.0L GMT800 2500 units whose titles name no box; we read the VIN rather than guess 2
NV1500 — S10 / Sonoma 2.2L Manual The light-duty five-speed behind the 2.2L four-cylinder compacts, 4x2 2
Total 133

Other GMC Model Years

Every model year we hold GMC transmissions for. Years without a link are in stock but have no year page yet — text us your VIN.

2024202320222021202020192018201720162015201420132012201120102009200820072006200520042003200220012000
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Why Buy a 2000 GMC Transmission from Auto Power Source

Every 2000 GMC transmission here is a used OEM unit pulled from a low-mileage donor vehicle, cleaned, inspected and bench-tested before it is listed. We hold 133 of them for the 2000 model year alone, which is why we can name the exact box rather than offer you a generic four-speed and hope it bolts up.

2000 is the hardest GMC year to shop by nameplate, because GM was running two truck generations at once. The new GMT800 Sierra 1500 and Sierra 2500 had arrived while the heavy-duty pickups carried on in the old Classic body as C2500, K2500, C3500, C3500HD and K3500. A 2000 three-quarter-ton is therefore either a GMT800 Sierra 2500 on a 6.0L or a Classic C/K 2500 on a 5.7L, 7.4L or 6.5L diesel, and the two do not share a gearbox fitment.

The headline trap is the Yukon XL. 2000 is the first model year for the name, and the listings carry no displacement at all — just 4x2 or 4x4. A Yukon XL 1500 is a half-ton on the 4L60E; a Yukon XL 2500 is a three-quarter-ton on the 4L80E. Same badge wording, same body, different box, because the chassis decides. We match the donor VIN to your VIN so the right one ships.

Two things that are true of 2001 and later are not true here, and both cost people money. There is no Allison 1000 in a 2000 GMC — it arrives for 2001 — so every heavy-duty automatic on this page is a 4L80E. And there is no 4L65E yet either, so every half-ton automatic is a 4L60E regardless of displacement. A 2001 unit is not a drop-in substitute.

Manual trucks need the same care. 2000 holds three boxes: the NV1500 behind the 2.2L compacts, the NV3500 behind the 4.3L compacts and the half-ton Sierra, and the NV4500 in the Classic C/K 2500 and 3500. Two GMT800 Sierra 2500 6.0L manuals name no box at all, so we read the VIN before anything ships.

Shipping is free to the lower 48, every unit carries our warranty, and an ASE-certified technician confirms the match against your VIN in writing before you pay. Text +1-307-441-5554, email info@autopowersource.com or call 1-877-313-8995.

📱 Fastest way to match: text us your VIN, get options in minutes.Text Your VIN →

Your 2000 GMC Transmission Options: Compared

Most 2000 GMC owners face four real choices when the transmission fails:

← Swipe sideways to see all columns →
Option Cost Reliability Warranty Fitment Match
Used OEM (this collection) $$$ Best Value High — tested Included VIN-matched
New OEM (dealer) $$$$$ 2-4× more High Manufacturer Exact
Aftermarket / Reman $$$$ Varies 6-12 mo May adapt
Junkyard $ Cheapest Unknown None DIY

Tested used OEM hits the sweet spot — same engineering as new, fraction of the cost.

2000 GMC Transmission Buying Guide

5 things to verify before buying a used 2000 GMC transmission:

  1. Settle the body style first. A 2000 GMC heavy-duty pickup is either a Classic-body C/K 2500 or 3500 or a new GMT800 Sierra 2500, and the two are different trucks sharing a model year. The Classic trucks run 5.7L and 7.4L gas or a 6.5L Turbo Diesel; the GMT800 2500 runs the 6.0L Vortec. Get this right before anything else.
  2. The Yukon XL splits by weight rating, not displacement. A Yukon XL 1500 takes the 4L60E and a Yukon XL 2500 takes the 4L80E, and the listings name no engine for either. The door-jamb label and the build sheet settle it; the tailgate badge does not.
  3. Do not shop a 2000 as if it were a 2001. The Allison 1000 and the 4L65E both arrive for 2001, and the 8.1L Vortec replaces the 7.4L in the same year. Every heavy-duty automatic on this page is a 4L80E and every half-ton automatic is a 4L60E. A 2001 unit will not simply drop in.
  4. Read the Savana option code, not the displacement. A 4.3L or 5.7L Savana can be either a 4L60E van (Opt M30) or a 4L80E van (Opt MT1) — same body, same engine, different gearbox. The option code in the listing is the only thing that separates them, so we quote from it.
  5. Confirm the match with your own VIN before you order. Your VIN settles the transmission code, drivetrain and build split in one step. Text it to +1-307-441-5554 and we will confirm in writing exactly which unit fits your vehicle before you pay.

Our ASE-certified technicians verify every one of these points against your VIN before any unit ships.

📞 Need help choosing the right 2000 GMC transmission? Talk to our team live.Call 1-877-313-8995

Frequently Asked Questions

How many 2000 GMC transmissions do you have in stock?
133 tested units across 12 transmission families, from the 4L60E in a Sonoma to the NV4500 behind a 7.4L Classic-body K3500. Live stock, counted active only — never a catalogue listing.
What transmission is in a 2000 GMC Sierra 1500?
The 4L60E on every automatic, whether the engine is the 4.3L V6, the 4.8L or the 5.3L — 2000 predates the 4L65E, so displacement does not change the box on a half-ton. The manual trucks run the NV3500.
Is there an Allison 1000 in a 2000 GMC?
No. GM launched the Allison 1000 for 2001, alongside the 6.6L Duramax and the 8.1L Vortec. Every heavy-duty automatic in the 2000 model year is a 4L80E, so an Allison unit is not a substitute and a 2000 unit will not go into a 2001 Duramax truck.
What is the difference between a C2500 and a Sierra 2500 in 2000?
They are two different trucks sold in the same year. The C2500 and K2500 are the carryover Classic body on a 5.7L, 7.4L or 6.5L diesel; the Sierra 2500 is the new GMT800 truck on the 6.0L Vortec. Both use a 4L80E automatic, but the bellhousing, wiring and mounting are not shared, so we confirm the body style from the VIN.
Does a Yukon XL 1500 use the same transmission as a Yukon XL 2500?
No. The XL 1500 is a half-ton on the 4L60E and the XL 2500 is a three-quarter-ton on the 4L80E. 2000 is the first year for the Yukon XL name and the listings carry no displacement, so the weight rating is what you need to confirm.
Why do you list both a C3500 and a C3500HD with the same specifications?
Because our supplier catalogue does. Both nameplates carry an identical set of fifteen specifications for 2000 (the same 5.7L, 7.4L and diesel rows, the same 3500 HD and Exc. 3500 HD splits) and the K3500 repeats fourteen of them. We show the stock honestly rather than merge the nameplates, and your VIN tells us which pool your truck sits in.
My Sierra 2500 is a 6.0L manual and the listing names no gearbox. What do I do?
Send us the VIN. Two of our 2000 Sierra 2500 manual units are listed without a box, and a 6.0L GMT800 2500 could leave the plant with either an NV4500 or a ZF S6-650 (Opt MW3). We confirm which one in writing before you pay rather than guess from the badge.
What does the warranty cover and how fast does it ship?
Every unit on this page carries our standard warranty and ships free to the lower 48. Most 2000 units leave the yard within one to three business days of your order being confirmed. Call 1-877-313-8995, text +1-307-441-5554 or email info@autopowersource.com.
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100K+
Engines+Transmissions In Stock
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Our 6-Step Inspection & Shipping Process

Every GMC transmission we ship has been through these six steps:

1. VIN-Matching
We match the donor VIN to your VIN to confirm transmission code, drivetrain, and 2WD/4WD configuration.
2. Tested & Verified
ASE-certified technicians Shift-Test every gear under load. Units are checked for clean engagement, no slipping, no abnormal noises.
3. Noise & Smoke Verification
Units are run to verify normal mechanical sound and clean operation — catches internal wear static tests miss.
4. Visual Inspection
Every accessible component is inspected: bell housing, output shaft, solenoid pack, cooler lines, sensor harnesses.
5. Photograph & Catalog
Multi-angle photos sent to you BEFORE we ship for your approval.
6. Palletize & Ship
Strapped on a heavy-duty wooden pallet, shipped via freight at no charge.

Our Photos-Before-Shipment Guarantee

Before any 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. On top of 30-day money-back and the warranty included with every unit. Browse all 133 2000 GMC transmissions below.

✉ Email Us at info@autopowersource.com
No match? Text VIN →