3.6L gasoline V6 (High Feature LY7 / LLT / LFX / LGX)
GM 3.6L V6 Engine Repair & Replacement
GM's 3.6L V6 powers a long list of crossovers, cars and mid-size trucks. Earlier versions are known for timing chain stretch; later versions are generally more robust. We diagnose timing, oil and cooling problems on the 3.6L before recommending repair or replacement.
Common applications
- Chevrolet Traverse, GMC Acadia and Buick Enclave
- Chevrolet Camaro and Equinox (select years)
- Chevrolet Colorado and GMC Canyon
Known problems and symptoms
Timing chain stretch codes
Common on 2007–2012 engines; shows as cam/crank correlation codes.
Oil leaks
Oil cooler and cam cover gaskets on higher-mileage engines.
How we diagnose it
- Cam/crank correlation data
- Oil level and change-history review
- Leak inspection
Repair and replacement options
- Timing chain and guide replacement
- Gasket and oil cooler repairs
- Engine replacement when needed
GM 3.6L V6 repair topics
GM 3.6L V6 engine diagnostics
Testing-first diagnosis for GM 3.6L V6 running, noise and warning-light problems.
3.6L V6 timing chain repair
Timing chain stretch diagnosis and repair on GM's 3.6L.
GM 3.6L V6 engine repair, rebuild or replacement
How we decide between repairing, rebuilding or replacing a GM 3.6L V6 with major internal damage.
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Frequently asked questions
Why did my 3.6L stretch its timing chains?
Extended oil change intervals and low oil level are commonly linked to chain wear on early 3.6L engines.