GM Service Manual Online
For 1990-2009 cars only

Intermittent Dead Battery -performance

Subject:Intermittent Dead Battery

Models:.



When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

Condition/Concern:

Intermittent Dead Battery

Recommendation/Instructions:

Determine if the IGN 0 ckt is turning on with the key out. This can be seen by watching the PRNDL display and the battery light turns on when wiggling lock cylinder with key removed. If this IGN 0 ckt is turning on with the key out, replace the ignition switch.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.

Models:

(02, 03 Chevrolet Trailblazer, Trailblazer EXT., 2WD/4WD) and (02, 03 GMC Envoy, Envoy XL 2WD/4WD) and (02, 03 Oldsmobile Bravada AWD)