2010–2011 Buick LaCrosse: Check engine light with codes P0008 or P0017 (3.6L timing chain stretch)
Likely causes, ranked
- Stretched timing chainsShop
- Long oil change intervals or low oilDIY
Real-owner fix counts will appear here as reports come in.
DIY or shop: See DIY or shop section
Parts to check
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Symptom: A check-engine light, rough running, or a rattle, with codes like P0008 or P0017.
Likely causes
- Stretched chains. GM's bulletin ties these codes to timing chain stretch on the 3.6L and describes checking cam/crank correlation with a scan tool.
- Oil changes. Low oil and long change intervals are commonly blamed for faster wear.
DIY or shop?
Shop. GM's extended timing chain coverage did not list the LaCrosse, so ask a dealer about goodwill.
Useful steps
- Read the codes.
- Check the oil level.
- Ask a dealer to measure cam/crank correlation.
Vehicle focus: 2010–2011 Buick LaCrosse.
Safety / mechanic note
A badly stretched chain can jump and damage the engine. Verify with a mechanic or dealer.
Related trouble codes
Recalls & service bulletins
Technical service bulletins
- 12-06-01-009F GM bulletin for 3.6L engines setting P0008, P0009, P0016, P0017 and related codes from timing chain stretch. Replace the chains and related parts after confirming with a scan tool. Details
NHTSA complaints: Count unavailable: too few NHTSA complaints matched this issue under the model names we could query to give a reliable number (checked 2026-10-15).
Always check your VIN for open recalls at nhtsa.gov/recalls.
Sources
What actually fixed it?
Had this problem? Tell other owners what the real fix was. Reports are counted above; we never show made-up numbers.