Popular GMC Engine Codes & Average Prices
Per-code averages from the curated catalog — every listing priced below its typical market reference.
Expert Solutions for Every GMC Model
Our GMC specialists map every code, variant and swap — pick your model for the full breakdown.
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In-Depth Guide — Buying a GMC Engine
REPLACEMENT OPTIONS — USED VS RECONDITIONED VS REMANUFACTURED (deep guide)
GMC is the premium half of the GM truck family, and its replacement decisions mirror Chevrolet's mechanics with a Denali-tier owner mindset: keep it right, keep it long.
Used (9 months/6,000 miles) covers the volume core — Sierra 1500 and Yukon L84 V8s (your fitment-checked price), Terrain LSD (your fitment-checked price), Canyon L3B (your fitment-checked price) — with the deepest donor supply in the GM range (Sierra/Yukon-class stock runs 27–35+ listings deep in the warehouse DB). The screening that matters is the L84 AFM/DFM valvetrain inspection; a verified-screened used L84 is the best truck-engine value on the site.
Reconditioned (16 months/12,000 miles) is the tier for Denali keepers — Sierra Denali and Yukon AT4/XL L87 6.2 V8s (your fitment-checked price) and Acadia LGX V6s (your fitment-checked price) — where fresh valvetrain work and machined surfaces match the vehicle's remaining life. The L87 shares the AFM/DFM watch item with the L84, which makes the reconditioned scope (lifter bores, deactivation hardware) directly relevant.
Remanufactured (36 months/36,000 miles) owns the Sierra HD L5P Duramax (your fitment-checked price vs your fitment-checked price): diesel fuel-system economics make full documentation and factory-tolerance assembly the rational choice for a working truck. Installed Duramax totals cross your fitment-checked price — the tier where 2-installment financing (if you qualify, on your fitment-checked price+ bills) applies. Reman also suits Yukon XL L87 tow rigs on decade holds.
Decision path: 1500/Yukon daily work truck → used, screened. Denali keeper → reconditioned. Sierra HD diesel or decade-hold tow rig → remanufactured.
POPULAR GMC ENGINE CODES & PRICES (real catalog data)
- LSD 1.5L Turbo I4 (Terrain, Terrain Denali) — your fitment-checked price vs your fitment-checked price. The compact-SUV four; Denali trim shares the engine, so price identity across trims is normal here.
- LSY 2.0L Turbo I4 (Acadia) — your fitment-checked price vs your fitment-checked price. The three-row family four; straightforward transverse swaps.
- L3B 2.7L Turbo I4 (Canyon, Canyon AT4X) — your fitment-checked price vs your fitment-checked price. The midsize truck four; AT4X donors often show off-road duty, so intake and undercarriage screening matter.
- LV3 4.3L V6 (Savana) — your fitment-checked price vs your fitment-checked price. Commercial van demand; fleet turnover keeps supply steady and pricing flat.
- LGX 3.6L V6 (Acadia Denali) — your fitment-checked price vs your fitment-checked price. The mainstream GM V6; timing-phaser and carbon checks are the family gates.
- L84 5.3L V8 (Sierra 1500, Yukon, Yukon XL) — your fitment-checked price vs your fitment-checked price. The volume king: three GMC lines share it, depth is the deepest in the DB, and the AFM screening question is answered on every listing.
- L87 6.2L V8 (Sierra 1500 Denali, Sierra Denali, Yukon AT4, Yukon XL) — your fitment-checked price vs your fitment-checked price. The premium V8 — four Denali/AT4 trims share the code, and its AFM/DFM history matters exactly like the L84's.
- L5P 6.6L Turbo V8 Diesel (Sierra HD) — your fitment-checked price vs your fitment-checked price. The catalog's GMC ceiling: CP4 pump status, injector flow, and aftertreatment history documented on every unit. Installed totals cross your fitment-checked price — financing into 2 installments (if you qualify) applies here.
GMC ENGINE TYPES EXPLAINED
GMC's range is GM truck architecture in five tiers. The compact turbo fours (LSD 1.5, LSY 2.0, L3B 2.7) cover Terrain/Acadia/Canyon — direct-injected, transverse (or longitudinal in the Canyon's case), with the standard small-turbo carbon and oil-discipline profile; the L3B's high specific output makes oil level the survival trait. The V6 (LGX 3.6) serves the Acadia Denali bracket — chain-driven, non-turbo, easy installs. The small-block V8 family (L84 5.3, L87 6.2) powers the 1500/Yukon lines with AFM/DFM cylinder deactivation — the dominant reliability conversation on post-2014 units (see §5). The LV3 4.3 V6 is the Savana van workhorse — old-school simplicity, fleet economics. The L5P 6.6 Duramax is the HD diesel discipline: overbuilt block, upstream fuel-system sensitivity, and aftertreatment hardware that rewards documented maintenance. No hybrid-specific codes, no boxer, no V10 in the GMC catalog.
GMC ENGINE REPLACEMENT COST IN THE USA
components: your fitment-checked price to your fitment-checked price each your fitment-checked price under market — verified row by row.
Labor by vehicle class (typical install, estimate — confirm with the sales desk):
- Terrain/Acadia (midsize SUV, transverse): your fitment-checked price
- Canyon (midsize truck, longitudinal): your fitment-checked price
- Sierra 1500/Yukon (full-size body-on-frame V8): your fitment-checked price
- Savana (full-size van): your fitment-checked price
- Sierra HD (diesel heavy truck): your fitment-checked price
Worked examples: a Terrain LSD lands around your fitment-checked price installed. A Sierra 1500 L84 runs your fitment-checked price. A Sierra HD L5P reaches your fitment-checked price installed — the tier where splitting into 2 financing installments (if you qualify, your fitment-checked price+ orders) is standard. Freight: FREE, insured, 12–16 working days, USA and Canada, lift-gate coordinated.
GMC FAMILY-SPECIFIC PROBLEMS & SYMPTOMS
L84/L87 (5.3/6.2 EcoTec3) — AFM/DFM. The documented failure: collapsing lifters seize when oil-control solenoids stick, the roller chews the cam lobe — "the tick that becomes a thump," then a bank misfire. Symptoms: rhythmic tick at idle unchanged by oil temperature; P0300-family misfires clustered on the deactivation cylinders (1/4/6/7 on the L84); P3400–P3449 deactivation codes; intermittent misfire only in V4 mode; a quart per 1,000–1,500 miles consumed; gold glitter in the filter. Our gate: teardown inspection of lifter bores, re-listing with verified delete or confirmed-healthy hardware. A screened L84 is a 200,000–250,000-mile engine.
L5P Duramax: bottom end overbuilt; failures originate upstream. CP4 pump failure sends metal through the injectors — long crank when hot, P0087 under load, metal flakes in the filter housing (shutdown immediately), white smoke with raw diesel smell, diesel thinning the oil. Our units ship with pump inspection (replacement on any metal), injector flow tests, and fuel-system flush. Aftertreatment history (regen frequency, derate codes) documented.
LGX 3.6: cold-start phaser rattle with P0008/P0009 timing-correlation codes; DI carbon by 70–80k (idle stumble, part-throttle hesitation). Both pre-listing inspectable.
L3B 2.7: oil discipline — low-oil events find rod bearings first; knocking at low RPM under load is the terminal symptom. Knock-sensor warning codes are taken seriously at screening.
LSD/LSY small turbos: DI carbon plus cooling-side maintenance history; overheating events are the small engines' real killer. Rough idle clearing above 2,500 rpm and part-throttle hesitation are the symptom signatures.
BUYING GUIDE — ORDERING YOUR GMC ENGINE
Step 1: VIN at /get-price/ — GMC trims hide engine splits (a "Sierra 1500 Denali" is an L87; a plain "Sierra 1500" is usually the L84; "Sierra HD" means the L5P), so the VIN's engine digit pins the quote. Step 2: live tier comparison — L84 depth is the deepest in GM; L5P supply rotates with donor quality, so confirm availability early on HD builds. Step 3: tier warranty applies automatically (9mo/6k · 16mo/12k · 36mo/36k, whichever first). Step 4: Authorize.net-tokenized checkout (card or ACH/eCheck) or phone at +1 (662) 452-4928. FREE insured freight from in 12–16 working days, lift-gate coordinated, USA and Canada. On Sierra HD builds over your fitment-checked price installed, ask about 2-installment financing if you qualify. Canadians: same freight, USD pricing, duties via your broker.
GMC — Live Market Listings (reference)
Used-condition market reference listings — your direct price and per-listing savings come from the curated catalog above.
Meet Your GMC Engine Specialists
A dedicated desk for GMC fitment, QC sign-off and warranty handling — 27 specialists across 9 departments stand behind every order.
VIN cross-match and swap guidance for every GMC code.
Compression, leak-down and bench QC with documented sign-off.
9/16/36-month ladder claims handled in-house, 48-hour decisions.
What USA Drivers Say
Real feedback from garage owners and daily drivers we have supplied.
Shop GMC engines by model
34 GMC applications — each model page lists the conditions, odometer bands and prices we publish.
Model page shows verified prices where we publish them; "quote" marks applications priced on request by the fitment desk.
Quick answer
GMC replacement engines — what you need to know first
Replacement engines for the GMC are matched by engine code from your VIN, not by model year alone. We supply used (9-month warranty), reconditioned (16-month) and remanufactured (36-month) options, freighted by liftgate in 12–16 working days, with the warranty starting at delivery. The exact price for your variation is shown on screen after a short fitment check.
- Match by code, not by year — the same GMC model year can use more than one engine unit.
- Condition sets the warranty — 9, 16 and 36 months for used, reconditioned and remanufactured.
- Odometer band sets the price — 30–60K, 60–90K and 90–120K mile bands.
Which GMC engine do you actually have?
Start with the VIN. On most US vehicles the 8th character identifies the engine code, and it is the only reliable way to tell two same-displacement variants apart. Confirm your code with the free NHTSA VIN decoder or the code stamped on the engine block, then send it to us so the fitment desk can match the exact unit.
| Fitment check | What we confirm |
|---|---|
| Engine code | Confirmed from your VIN before dispatch |
| Displacement / configuration | Matched to your build specification |
| VIN position to check | 8th character identifies the engine code on most US vehicles |
| What we need from you | VIN (preferred) or year + make + model + engine size |
| Fuel and drivetrain | Confirmed at the fitment stage — 2WD/4WD/AWD changes the unit that fits |
| Interchange check | We confirm the exact unit against your engine code, not just the model year |
Used, reconditioned or remanufactured for a GMC — what is the difference?
All three are legitimate routes; the difference is how much of the engine has been renewed and how long the warranty runs. Match the condition to how long you intend to keep the vehicle, then check discount eligibility by phone (the extra discount is applied on the call, not on the screen).
| Condition | What it is | Warranty | Best suited to |
|---|---|---|---|
| Used (tested) | Original used engine from a donor vehicle, odometer band stated on the quote | 9 months / 6,000 miles | Budget repairs where the vehicle still has years left |
| Reconditioned | Stripped and rebuilt with new wear components to a documented specification | 16 months / 12,000 miles | Balancing cost against longer service life |
| Remanufactured | Rebuilt to manufacturer-level tolerances with the full wear set replaced | 36 months / 36,000 miles | Long-term keepers, work trucks and fleet vehicles |
Related supply pages: used engines · reconditioned engines · remanufactured engines · transmissions.
Should you repair or replace a GMC engine?
Diagnose before you commit. Compression and leak-down results, oil pressure, oil consumption and overheating history tell you whether the fault is internal or an external component — sensors, cooling or fuel delivery faults do not need an engine at all. Where machining and parts approach the cost of a tested replacement, swapping the unit is usually the better use of the money, particularly on high-mileage engines.
- Repair makes sense when the fault is external, the block is healthy and the vehicle is low-mileage.
- Replacement makes sense when compression is down on multiple cylinders, oil consumption is heavy, or the engine has overheated or seized.
- Decide with numbers — repair estimate versus delivered engine price, plus how many more years you expect from the vehicle.
How we verify GMC engine fitment and condition
Our fitment desk confirms the engine code against your VIN before dispatch, documents the inspection of the unit, and states the warranty term in writing on your quote. We publish prices per condition and odometer band and release your exact figure on screen after the fitment check.
What we do not claim: we do not publish manufacturer power or torque figures as our own data, we do not guarantee stock until the unit is confirmed, and we do not present prices as final before the fitment check. Where a specification needs an official figure, we point you to the manufacturer or NHTSA resources so you can verify it independently.
Verify independently: NHTSA VIN decoder · NHTSA safety recalls · EPA fuel economy data · GMC official site.
GMC — FAQ (10 questions)
What engines fits a GMC?
Fitment is confirmed by engine code, not by model year alone. Send your VIN and we match the exact unit before anything ships.
How much does a GMC engine replacement cost?
Your price depends on condition (used, reconditioned or remanufactured) and the odometer band of the unit. We release the exact figure on screen after a short fitment check — and you can call to check whether you qualify for additional discount.
Used vs reconditioned vs remanufactured — which should I choose for a GMC?
Used is the lowest-cost route with a 9-month warranty. Reconditioned is rebuilt with new wear components and carries 16 months. Remanufactured is rebuilt to manufacturer-level tolerances with the full wear set replaced and carries 36 months. Choose by how long you intend to keep the vehicle.
Will a GMC engine from another vehicle fit mine?
Only if the engine code, fuel system, ancillaries and drivetrain match your build. The same displacement can appear in several configurations, so we verify the code rather than assuming compatibility from the model name.
How do I find my engine code?
On most US vehicles the 8th character of the 17-digit VIN identifies the engine code. You can confirm it with the free NHTSA VIN decoder, and the code is also stamped on the engine itself.
How long does delivery take?
Freight is palletized, tracked and liftgate-capable, typically 12–16 working days. Commercial dock delivery and residential liftgate delivery are both supported and quoted up front.
What does the warranty cover?
Parts are covered for the stated term nationwide. Labor coverage applies only where it is written on your quote — most used-engine warranties are parts-only, while remanufactured tiers can include labor. Your written quote is the controlling document.
What happens if the unit arrives damaged or defective?
Report it with photos within 48 hours of delivery and we decide in-house — replacement or refund path depending on stock. Freight damage is documented with the driver at the door.
How does the core return work?
Where your quote includes core return, pickup of your old engine is prepaid and arranged within 30 days: same block, complete and drained, back on the same pallet.
Do you supply GMC engines for both automatic and manual vehicles?
Yes. Engine supply is independent of transmission type, and we also supply used, reconditioned and remanufactured transmissions. Tell us the drivetrain at the fitment stage so the ancillaries match.
Real quotes in minutes — the same inventory, the same prices, on the phone.
Frequently asked questions about GMC Engine Price & Transmission Price
What does delivery cost?
Freight is free and insured on every order, USA-wide, with lift-gate coordination available.
How long does delivery take?
Most orders ship in 12-16 working days.
What warranty do I get?
Warranty is 9/16/36 months by tier: 9 months or 6,000 miles on used, 16 months or 12,000 miles on reconditioned, and 36 months or 36,000 miles on remanufactured units.
Can I finance a replacement?
Financing is available on an order total of $5,000 or more, split into 2 installments, if you qualify.
Is a tested used engine better than a junkyard core?
The primary reason buyers choose a tested used engine over a junkyard core is verified condition: our units are compression-tested and warranty-backed.
| Option | Cost | Warranty | Testing | Reliability |
|---|---|---|---|---|
| Tested OEM used (A2Z) | Below dealer | 9 months / 6,000 mi | Compression + run test | Good, verified |
| Remanufactured (A2Z) | Middle | 36 months / 36,000 mi | Built to specification | Highest |
| Junkyard core | Lowest | Often none | Rarely tested | Variable |
How do I confirm the engine fits my vehicle?
Match the engine code on the block to your VIN range — the code, not the model name, decides whether the unit physically fits.
| Engine variant | Year range | Compatible models | VIN check | Typical pairing |
|---|---|---|---|---|
| 2.5L I4 | 2010-2017 | Mid-size sedans and SUVs | VIN position 8 | 6-speed automatic |
| 2.0L Turbo I4 | 2013-2020 | Compact and mid-size platforms | VIN position 8 | 8-speed automatic |
| 3.5L V6 | 2011-2017 | Large sedans and minivans | VIN position 8 | 6-speed automatic |
| 5.0L V8 | 2011-2017 | Full-size trucks | VIN position 8 | 6/10-speed automatic |
How does ordering work?
Ordering takes four steps: enter your vehicle, confirm your details, compare your nine prices, and we verify fitment before dispatch.
- Enter your vehicle: make, model and condition preference.
- Confirm your contact details and review the summary.
- Compare nine price options across three warranty tiers.
- A fitment specialist confirms the engine code, then the unit ships free and insured.
What do the engine terms mean?
A used engine is a tested original unit that has not been rebuilt.
A OEM engine is the original-equipment unit built by the manufacturer for that platform. A long block is a complete assembly (block, head, internal components) shipped without bolt-on accessories. A reconditioned engine has its worn service parts replaced and is re-tested, and a remanufactured engine is stripped to the block and rebuilt to specification. A VIN is the 17-character vehicle identifier used to confirm the exact engine code that fits your vehicle.