Reduced power light on and diagnostic trouble code P1680 P1221 and or P1271 stored in the powertrain...
Chevrolet technical service bulletin 3138 for 2002-2004 Chevrolet Trailblazer, 2002-2005 GMC Envoy and 2002-2004 Oldsmobile Bravada and others.
- Bulletin number
- 3138
- Component
- Power train
- Summary
- Reduced power light on and diagnostic trouble code p1680 p1221 and or p1271 stored in the powertrain control module. Eh
Owners of these vehicles have filed 706 complaints in the transmission category.
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