3.6L V6 Engine Complete Assembly for 2013-2017 Buick, Chevrolet, & GMC
Product Notes Read before buying
For the 2017 GMC Acadia, this engine fits the 'Limited' model ONLY. It does not fit the redesigned, smaller 2017 Acadia.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | SUV | 2013 | V6 3.6L | AWD/FWD | Automatic |
| CXL | SUV | 2013 | V6 3.6L | AWD | Automatic |
| Convenience | SUV | 2014 | V6 3.6L | AWD | Automatic |
| Convenience | SUV | 2014 - 2017 | V6 3.6L | FWD | Automatic |
| Leather | SUV | 2014 - 2017 | V6 3.6L | AWD/FWD | Automatic |
| Premium | SUV | 2014 - 2017 | V6 3.6L | AWD/FWD | Automatic |
| 2015 - 2016 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| LS | SUV | 2013 - 2017 | V6 3.6L | AWD/FWD | Automatic |
| LT | SUV | 2013 - 2017 | V6 3.6L | AWD/FWD | Automatic |
| LTZ | SUV | 2013 - 2016 | V6 3.6L | AWD/FWD | Automatic |
| Base | SUV | 2015 - 2016 | V6 3.6L | FWD | Automatic |
| Premier | SUV | 2017 | V6 3.6L | AWD/FWD | Automatic |
| 2014 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Denali | SUV | 2013 - 2017 | V6 3.6L | AWD/FWD | Automatic |
| SL | SUV | 2013, 2016 | V6 3.6L | FWD | Automatic |
| SL | SUV | 2013 | V6 3.6L | AWD | Automatic |
| SLE | SUV | 2013 - 2017 | V6 3.6L | FWD | Automatic |
| SLE | SUV | 2013 - 2016 | V6 3.6L | AWD | Automatic |
| SLT | SUV | 2013 - 2016 | V6 3.6L | AWD | Automatic |
| SLT | SUV | 2013 - 2017 | V6 3.6L | FWD | Automatic |
| SLT1 | SUV | 2015 - 2016 | V6 3.6L | FWD | Automatic |
| SLT2 | SUV | 2015 - 2016 | V6 3.6L | AWD | Automatic |
| Denali | SUV | 2017 | V6 3.6L | 4WD | Automatic |
| SLE | SUV | 2017 | V6 3.6L | 4WD | Automatic |
| SLT | SUV | 2017 | V6 3.6L | 4WD | Automatic |
| 2014 |
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | SUV | 2017 | V6 3.6L | AWD/FWD | Automatic | engine_size: include 3.6L; engine_config: include V6; fuel_type: include GAS; application_notes: include Must be engine code LLT (8th digit of VIN is 'D') [inferred] |
Know This Engine Before You Buy
The research behind our purchase interview — recalls, bulletins and real install economics for this engine family:
A quick look at your own vehicle makes sure the right engine shows up:
- Verify the 8th digit of the VIN is 'D'.
- For 2017 GMC Acadia, verify the 11th digit of the VIN is 'J'.
- Confirm drivetrain configuration (FWD vs AWD) to prepare for oil pan swap if necessary.
- Inspect cylinder heads to ensure three individual exhaust ports per head (not integrated).
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- EN-48383 Camshaft Retaining/Holding Tool Kit
- EN-46106 Flywheel/Flexplate Holding Tool
- EN-46111 Crankshaft Rotation Tool
- EN-48245 High-Pressure Fuel Injector Remover
- EN-48246 Telemeter/Seal Installer
- Bi-directional scan tool
Budget for these consumables at install:
- Engine Oil (6.0 quarts of full synthetic 5W-30 meeting GM dexos1 Gen 2/3 spec) & Filter
- Engine Coolant (GM-approved Dex-Cool 50/50 pre-diluted)
- 6 new OE-spec Iridium spark plugs
- Intake Manifold Gaskets (Upper and Lower)
- Exhaust Manifold Gaskets
- Thermostat & Water Outlet Gaskets
- Rear Main Seal
- New Torque-to-Yield Harmonic Balancer Bolt
What your vehicle’s computers will need after the swap:
What’s involved: Crankshaft Position (CKP) Sensor Variation Relearn and Security/Immobilizer Relearn
Crankshaft Position Variation Relearn is mandatory to prevent false misfire detection and clear codes like P0315. Security/Immobilizer Relearn is required if the ECM is swapped or needs synchronization.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- FWD vs. AWD Oil Pan & Intermediate Shaft Bracket: Must swap oil pan and passenger-side intermediate axle shaft mounting bracket if configurations differ.
- Torque-to-Yield (TTY) Bolts: Crankshaft harmonic balancer bolt must be replaced and torqued to 74 lb-ft plus 150 degrees.
- Timing Chain Stage 1 and Stage 2 Alignment: Requires a two-stage alignment process to prevent bending valves.
- Fragile Knock Sensors and Harness: Connectors deep in the 'V' are extremely brittle.
- Engine/Subframe Removal: Most efficient method is dropping the entire front subframe with engine and transmission attached.
Easy to get right once you know them:
- Reusing the Crankshaft Balancer Bolt.
- Failing to Swap the Oil Pan on AWD Conversions.
- Skipping the PCV Orifice Modification.
- Improper Timing Chain Installation without Cam Locks.
- Ignoring the Crankshaft Position Relearn.
- Assuming All GM 3.6L Engines are Interchangeable.
Not issues with the units on this page — the manufacturer documented these for every engine of this family, wherever you buy one. Handy for your installer:
🔎 Recommended at install: Replace timing chains, guides, and tensioners. Reprogram ECM to shorten Oil Life Monitor intervals.
🔎 Recommended at install: Diagnose slippage and replace the crankshaft if slipped.
🔎 Recommended at install: Clean/modify PCV system, drill out tiny holes to 5/64" or 3/32".
🔎 Recommended at install: Perform professional chemical induction cleaning or manual walnut blasting.
🔎 Recommended at install: Replace water pump.
Researched from factory recalls, TSBs and OEM service data (reference unit 300-10120-5585406). Unit-specific details — mileage, condition, warranty, freight — are covered in the checkout interview.
Policies, in plain English.
Shipping & Handling
- Ships by LTL freight on a pallet — a real freight truck, not a parcel van
- Your checkout freight quote covers delivery to your door (liftgate service included for residential addresses)
- The carrier calls ahead to schedule a delivery window — someone must be present to receive it
- Typically palletized and picked up within 2–3 business days; transit time depends on distance
120-Day Warranty
This part includes a 120-day warranty.
- If the part fails within the warranty window, we'll replace it or refund per the coverage terms
- Coverage is parts-only — installation labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Your pre-purchase interview reviews these exact terms with you before anything is charged.
Returns (30 Days)
We accept returns of uninstalled parts within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: This part ships by freight (LTL) — the part price is refundable per the terms above, but shipping costs are non-refundable and return freight follows the seller's return terms. Your pre-purchase interview walks through the exact numbers before you buy
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
Freight damage is rare — and you're fully protected when you do two things at delivery:
- Inspect before you sign — you're allowed time to look the pallet over while the driver waits
- Write any damage on the delivery receipt before signing — that one line is what makes a freight claim succeed
- Severe damage? Refuse the delivery — it goes back at no cost to you and we make it right
- Photograph the pallet before unwrapping; report concealed damage within 24 hours of delivery
We handle the carrier claim — you just help document it. Your pre-purchase interview walks through this checklist too.
Order Cancellation
Cancel before shipment for a full refund. Once the pallet has been built, a preparation charge may apply — and once the freight carrier picks it up, shipping costs are non-refundable and standard return terms apply. Your pre-purchase interview shows the exact numbers before you pay.
Expert Guides
2013-2017 Traverse, Acadia & Enclave 3.6L V6 (LLT): Problems, Identification, and Used Replacement
Identify the exact 3.6L LLT engine, understand what causes timing chain failures, and learn when to replace it with a quality used OEM unit.
Read Full Guide →Related Trouble Codes (OBD-II)
50 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
GM: 19303674
Other: 8G1T11000AC, 8G1T11000AD, 8G1T11000AE, 8G1T11000BA, HD9T11000AA, HD9T11000BA
Fits Years: 2013 2014 2015 2016 2017
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Backed By The Selling Yard
This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
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