2008–2011 Cadillac CTS: Check engine light with P0008 or P0017 (3.6L timing chain)
Likely causes, ranked
- Stretched chains or worn tensionersShop
- 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 with P0008/P0017, a rattle, or rough running.
Likely causes
- Chains and tensioners. Cadillac Forums owners describe P0008 from chain stretch or tensioner problems, often linked to low oil.
DIY or shop?
Shop.
Useful steps
- Check oil level.
- Measure cam/crank deviation with a scan tool.
- Replace the full chain kit if stretched.
Vehicle focus: 2008–2011 Cadillac CTS.
Safety / mechanic note
A jumped chain can wreck the engine. Verify with a mechanic or dealer.
Related trouble codes
Recalls & service bulletins
Technical service bulletins
- 11340C Special coverage for 10 years/120,000 miles on timing chain wear for 2007–2009 CTS 2.8/3.6. Details
NHTSA complaints: 57 keyword-matched complaints for Cadillac CTS 2008–2011 (of 450 unique complaints queried, NHTSA complaints API by model year, queried 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.