1999 Chevrolet Blazer Q&A
1999 Chevrolet Blazer Question: Need to find what person did to undo.
This is a very difficult question to answer without seeing what the shop did to it. What was the end result of what the shop did? Did they make it so the A/C would work? Blower fan? Have you removed the controller to see if there are any modifications to the wiring? - Bret Bodas