..Went to vehical inspection,failed for parking brake.
I assume that you have a parking brake system, and that it is not operating correctly. If so, the problem may be in any, or all, of the following components: brake handle assm., cable system, mechanical actuators on each rear caliper.
The brake handle has an indicator switch which closes when the brake is set, illuminating the 'brake' lamp. Adjustment is automatic. Cycling the lever three times should result in lever movement of 3 to 5 notches when force is applied.
If the simple auto-adjustment doesn't solve your problem, you might want to invest in a GM manual:
http://www.helminc.com/helm/homepag...?hl=en&client=safari&rls=en&q=helminc&spell=1
