There has been a high percentage of no trouble found (NTF) 6.6 lly engine control modules (ECMS) being...
Chevrolet technical service bulletin 3346 for 2004-2005 Chevrolet Silverado and 2004-2005 GMC Sierra.
- Bulletin number
- 3346
- Component
- Engine and engine cooling: engine
- Summary
- There has been a high percentage of no trouble found (ntf) 6.6 lly engine control modules (ecms) being returned to the warranty parts center. The no trouble found (ntf) ecms are being replaced for a specific list of diagnostic trouble codes. Tt
Owners of these vehicles have filed 81 complaints in the engine category.
Vehicles covered
- Chevrolet Silverado 2004-2005 20042005
- GMC Sierra 2004-2005 20042005
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