GM Repair Problems? Ask GM Repair Expert Now.
Hello and welcome to just answer and allowing me to assist you. A couple questions to get a picture of whats going on please.Does the A/C compressor engage, have you had an A/C performance test done on the A/c system so we can eliminate any mechanical problem first.
yes you must do this procedure to initiate the climate control. Preferred Method (w/ Scan Tool)Clear all DTCs.Start the vehicle.With the scan tool, initiate the Motor Re-calibration feature of the Heating and Air Conditioning Special Functions menu.Verify that no DTCs have set as current DTCs.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)Clear all DTCs.Place the ignition switch to the OFF position.Connect all previously disconnected components.Remove the HVAC/ECAS fuse for a minimum of 10 seconds.Install the HVAC/ECAS fuse.Start the vehicle.Wait 40 seconds for the HVAC control module to self-calibrate.Verify that no DTCs have set as current DTCs. hope this resolves your problem this has to be done when ever you replace or disconnect you battery. If you require further service I;ll be happy to do so.
I was just giving you two choices that can be done I realize most people won't have the scanner required to do that so you go to step two. I see the hjvac fuse in both pics you sent the first pic is a 10 amp hvac top left, the second shows a 30 amp hvac fuse in the top rt you can try either one in that sequence to see if it resets won't hurt any thing I would try the 10 amp one first.
no remove the fuse wait about 10-15 sec reinstall the fuse then start engine and wait about 40 sec for the unit to self calibrate. did you try this method with both fuses one at a time?
on auto and max direction don't matter and correct sequence
I'm sorry this is as far as I can go not being there .Perhaps another expert has a different perspective on this issue and can help you further so I'll opt out so you may get further assistance. good luck.
where the terminals on the old relay brown or looked burnt at all ?
i would just coat the terminals on the new relay with dielectric grease as these compressors pull so many amps it is best to coat them to keep a good contact with the female terminals in the box and also the dielectric grease will stop fretting from happening causing a bad connection down the road
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