This Preliminary Information communication provides information to the technician the steps to diagnose...
Chevrolet technical service bulletin PIT5503 for 2011 Chevrolet Silverado 1500, 2011-2014 Chevrolet Silverado 2500 and 2011-2014 GMC Sierra 2500 and others.
- Bulletin number
- PIT5503
- Component
- Electrical system
- Summary
- This Preliminary Information communication provides information to the technician the steps to diagnose and repair vehicle with a Service Charging System message or Service Engine Soon Malfunction Indicator Lamp and the Engine Control Module may have set a P0621 and/or P0622. These concerns could be caused by the generator wiring harness rubbing on the Air Conditioning compressor line and shorting the circuits. Technician will inspect the generator wiring harness for chaffing and repair as necessary. Install additional conduit to protect the wiring harness from future issues.
Owners of these vehicles have filed 87 complaints in the electrical category.
Vehicles covered
- Chevrolet Silverado 1500 2011 2011
- Chevrolet Silverado 2500 2011-2014 2011201220132014
- GMC Sierra 2500 2011-2014 2011201220132014
- Chevrolet Silverado 3500 2013 2013
- GMC Sierra Denali 2011-2013 201120122013
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