Question about 2001 GMC Jimmy
I had it checked out by a few mechanics and one said it could be the thermostat, change it - not the problem. It needs a core flush - did that - not the problem - I don't know what it is is. Its strange because when you turn the control button to defrost it does not switch to defrost only the 1 setting and that is at the front only same if you move the button to the floor for heat - no change it stays at the same position. Then another mechanic did check the hoses and he said there is heat coming from hoses, he put a carboard piece in front of the rad it now has a little more heat but not what it is suppose to have and this is when you have the control button to level 4 - it should be super hot in the truck. What is going on, please help me, I am not mechanically inclined, and could it be a fuse? If so where are the fuse boxes in the truck or inside the hood of truck? What am I suppose to be looking for? At -50 in winnipeg last week for a few days it has not been fun driving.
Patricia in Winnipeg, Manitoba
It sounds like it could be the control panel or the A/C And Heater Control Calibration you can give this info to your mechanic... but if i were you i would go to gm dealer.replacing the wrong part will get expensive fast..... hopes this helps you..........................................A/C And Heater Control Calibration
Re-Calibrating Actuators (Primary)
When replacing the HVAC control module it will be necessary to allow the HVAC control module to perform a calibration process. When installing the HVAC control module be sure to perform the following:Important: Do not adjust any controls on the HVAC control module while the HVAC control module is self-calibrating. If interrupted, improper HVAC performance will result.
Alternate Method (W/O Scan Tool)
Posted on Dec 29, 2008
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