December 7: GM Engine Class Action Lawsuit Set To Begin news | 5 days ago
December 7: GM 8-Speed Transmission Lawsuit Runs Into Trouble news | 5 days ago
November 23: GM V8 Engine Lawsuit Claims L87 Engines Are Dangerous news | 19 days ago
November 10: GM Fights Fraud Claim in Fuel Pump Class Action Lawsuit news | 32 days ago
November 2: GM Fuel Pump Recall Failed, Says Class Action Lawsuit news | 40 days ago
4.0
definitely annoying- Typical Repair Cost:
- $300
- Average Mileage:
- 111,150 miles
- Total Complaints:
- 1 complaints
Most Common Solutions:
- replace knock sensors under intake manifold (1 reports)
engine problem
Helpful websites
- No one has added a helpful site for this 2003 Sierra 2500 problem yet. Be the first!





A D V E R T I S E M E N T S
Check engine light on - code reader says knock sensor. It's a common problem and easy to fix.
- Tttt D., abcd, DE, US