Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
May I have the year and model of your Chevy?
Ooops! Ok. I don't have access to info on RV's or anything that old. Let me opt out and forward you to a Tech better suited for this vehicle. Sorry for any inconvenience. Sit tight one sec... someone will be right with you...
You have a vacuum leak for the mode door actuators more then likely it is the hose that comes from the engine and heads toward the passenger side of the truck look under the hood with it running and listen for the hiss
Please help me help other people by rating my help to you