Used GMC engines
Where can you buy a tested used GMC engine for sale?
Car Part Headquarters supplies tested used and remanufactured GMC engines for cars, trucks, SUVs, and vans, shipped free to a commercial address across the lower 48 and backed by a 12-month parts-replacement warranty. Tell us your GMC’s year, model, and engine, and a specialist confirms the exact fitment before you pay.
Buying a used GMC engine
GMC shares its engine families with Chevrolet, so the buying questions are the same: whether the truck V8 carries cylinder deactivation, and on diesels which injector generation you have.
5.3L / 6.2L V8
Lifter failure associated with Active Fuel Management and Dynamic Fuel Management is the dominant reported issue on the later generations, and it affects the 6.2L as well as the 5.3L. Owners report it is not resolved by tuning the system off after the fact.
Duramax diesel
The concerns are generation-specific. Early LB7 injector failure and later LML fuel system complaints are the recurring items, and they are different repairs with different costs.
Before you order
On the gas V8s, confirm whether the donor has cylinder deactivation hardware. On the Duramax, the generation decides the fuel system, so we match on VIN rather than displacement.
Sources: NHTSA recalls and VIN lookup · 6.2L lifter failure owner reporting
01
GMC engines we commonly source
We regularly source GMC engines across the lineup - the 6.5L V8 Turbo Diesel, 6.2L V8, 6.0L V8, 5.7L V8, and 5.3L V8 among them. If your engine isn’t listed, tell us the year, model, and VIN and a specialist tracks down the right one.
- 6.5L V8 Turbo Diesel
- 6.2L V8
- 6.0L V8
- 5.7L V8
- 5.3L V8
- 4.8L V8
- 4.3L V6
- 3.6L V6
- 3.0L I6 Turbo Diesel
- 2.7L I4 Turbo
02
GMC models we fit
From daily drivers to trucks and SUVs, we match engines and transmissions to the GMC models we service. Don’t see yours? The finder covers the full GMC lineup.
- Sierra 1500
- Sierra Denali
- Yukon
- Yukon XL1500
- Canyon
- Envoy
- Envoy XL
- Envoy XUV
- Acadia
- Terrain
- Safari Van
- Van 1000
VIN & interchange codes
How GMC engines are identified by VIN
GMC engines of the same displacement can differ by VIN code, emissions package, and build - which changes the correct part. Here is the real interchange breakdown for a 2015 GMC Sierra 1500, the kind of detail a specialist confirms from your VIN before anything ships:
| Engine / application | Interchange # |
|---|---|
| 4.3L (VIN H, 8th digit, opt LV3) | 300-5244 |
| 5.3L (VIN C, 8th digit, opt L83) | 300-5453A |
| 6.2L (VIN J, 8th digit, opt L86) | 300-5762 |
Interchange data shown for reference. Availability and exact application are confirmed per order from your complete VIN.
Why buy your GMC engine from Car Part Headquarters
Tested before it ships
Every engine and transmission is compression- and pressure-tested and inspected before it leaves the warehouse.
12-month parts-replacement warranty
Approved claims are covered by replacement or store credit for a full year. Labor is not covered unless you add a parts-and-labor plan.
Free commercial shipping
Free delivery to a commercial address or freight terminal in 5-7 business days. Residential delivery is available for an added $175.
Fitment confirmed first
A specialist confirms the correct part for your exact year, make, model, and VIN before you pay - no guesswork.
How it works
Buying a used GMC engine, step by step
01
Tell us your vehicle
Enter the year, make, model, and part in the finder, or call. Add your VIN to pin the engine down exactly.
02
Get a confirmed quote
A specialist confirms availability, mileage, and compatibility, then sends a no-obligation quote.
03
Order & ship
We ship within 5-7 business days, free to a commercial address, with tracking.
04
Support after the sale
Questions before or after install are handled by the same team, backed by the 12-month parts warranty.
FAQ
Used GMC engines & transmissions
How much does a used GMC engine cost?
Price tracks the engine family more than the model year, and on GMC that usually means which of the 5.3L / 6.2L V8 and Duramax diesel you need. Displacement alone does not settle it, because the same badge can cover variants that differ in cost and availability. Tell us the year, model and VIN and you get a firm quote on the engine your vehicle actually takes, with availability confirmed before you pay.
Which GMC engines do you carry?
We regularly source GMC engines across the lineup, including the 6.5L V8 Turbo Diesel, 6.2L V8, 6.0L V8, 5.7L V8, 5.3L V8, 4.8L V8. If you don't see your exact engine, tell us the year, model, and VIN and a specialist confirms the right one before you pay.
Do you sell used GMC transmissions too?
Yes. Alongside used and remanufactured GMC engines, we source manual, automatic, and CVT GMC transmissions matched to your vehicle, backed by the same 12-month parts-replacement warranty.
Will the engine fit my exact GMC?
Fitment is confirmed before you pay. On the gas V8s, confirm whether the donor has cylinder deactivation hardware. On the Duramax, the generation decides the fuel system, so we match on VIN rather than displacement. Give us the year, model and 17-digit VIN and a specialist matches the correct engine to your exact application.
Are your used engines and transmissions tested?
Yes. Every used engine and transmission is compression- and oil-pressure tested and put through a rigorous inspection process by automotive experts before they ship.
What warranty comes with a part?
Every engine and transmission includes a 12-month parts-replacement warranty, plus lifetime support from ASE-certified experts. Approved claims are handled by replacement or store credit - we do not issue cash refunds. Labor is not covered on the standard warranty. You can upgrade to 3-year parts and labor coverage for $499 at the time of purchase. Full warranty details are provided with your order.
Can I get a longer warranty that covers labor?
Yes. The standard coverage is 12 months on parts. For $499 you can upgrade to a 3-year warranty that covers both parts and labor, purchased at the time of your order. Ask your specialist to add it when you confirm your part.
Ready to find your GMC engine?
Tell us the year, make, and model. A specialist confirms the right engine or transmission, availability, and mileage before you pay.