Originally Posted by gob71
The hvac computer may have lost programming or had a fault causing the issue. Turn the radio and heat/ac off. Pull the hvac/ecs fuse under the hood for at least 3 mins. Then replace the fuse and start the truck......do not touch the ac or radio...leave it alone and let the truck run for 5 mins to see if it solves the issue. If this does not solve the issue it may be the drivers side actuator, which on that truck is easy to get to and replace , you can do it yourself. Try the reprogramming first and report back and we can go from there.
Ok I did that so I will have to drive it a few days to see if that changes anything. Pulled fuse for 3 min. and the five minutes I turned on AC and it worked fine. It always works fine right after turnign the engine on. Moving that temp control up/down when it is failing changes nothing until I shut off the engine and restart it.
Chev said actuator runs around $180 does that sound right or was he quoting me installed price?