2001 GMC Sierra 1500 Q&A
2001 GMC Sierra 1500 Question: no heat
Please see the RepairPal article regarding the no heat condition of your 2001 GMC Sierra 1500: http://repairpal.com/i-have-no-heat-what-could-be-wrong. While this article applies to vehicles in general you may find some information that will help you find the cause of you problem. - Oakman
This maybe or may not be the answer but my heater was not putting out heat at idle but did while driving The fan was blowing fine except no heat.Problem was My coolant was low because I had a coolant leak, Fixed the leak added coolant and now heater works great!! Good luck Folks!!! - Visitor
Backflush heater core, cut both hoses going to core install 2flush kits. Get at walmart Hook garden hose 2 heater out hose leave in hose open, use low pressure and watch junk come out - Visitor
I have no heat. The blower works fine. It just blows cold air. I used the air this summer....no problem. I do...
on a cycle that allows recirculation there is some heat
One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail,...
heat defrost work only on passinger side.Recently went out of right passinger side only in middle.Thought it might be heater door actuator.I will admit I mixed anti-freeze this summer. SPEEDOMEETER...
During the hot of summer, the AC settings do not blow any cold air. The freon is full and the fan runs, just only pushes out hot air. During the winter the heat doesn't work, again the air comes th...