HVAC Digital Display Inoperative - active air cold compressor control display panel electrical HVAC manual operation performance poor position switch

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

Some customers may comment that HVAC digital display (RPO CJ2) does not illuminate or function. Root cause appears to be failure of CPU chip on circuit board within HVAC controller. As of early January, 2003, CPU chip has been upgraded to address this concern. Fix remains to replace the controller.

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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.

(03 CADILLAC ESCALADE and EXT, ESV) and (03 CHEVROLET AVALANCHE 2WD) and (03 CHEVROLET AVALANCHE 4WD) and (03 CHEVROLET SILVERADO 2WD) and (03 CHEVROLET SILVERADO 4WD) and (03 GMC SIERRA 2WD) and (03 GMC SIERRA 4WD) and (03 CHEVROLET TAHOE 2WD) and (03 CHEVROLET TAHOE 4WD) and (03 CHEVROLET SUBURBAN 2WD) and (03 CHEVROLET SUBURBAN 4WD) and (03 GMC YUKON 2WD) and (03 GMC YUKON 4WD) and (03 GMC YUKON XL 2WD) and (03 GMC YUKON XL 4WD) and (03 GMC YUKON DENALI AWD) and (03 GMC YUKON DENALI XL AWD)

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