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Old 07-27-2020, 04:30 PM   #3
Mouse330
 
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Drives: 2011 2SS, 2006 GMC Sierra
Join Date: Jul 2019
Location: MA
Posts: 247
Do u have any codes?
if not try re-calibrating the HVAC control module
Remove the HVAC control module fuse for a minimum of 10 seconds
reinstall
start the engine
Wait 40 seconds for the HVAC control module to self-calibrate
Do not adjust any controls while re-calibrating
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