2000 GMC New Sierra 1500 "heater blow hot air" Questions

heater blows cold air when i stop and hot air when i am driving at higher speeds sounds like a vaccum module is failing when the engine changes rpm's

heater in my 2002 GMC Sierra to blow cool air when in idle? It sometimes takes 15 minutes or longer to blow warm once I'm driving but it still doesn't blow hot, just a little warm. Also, it blows only

...heater core at firewall. Can only blow in left side as directional valves will prevent opposite. Chunks of stuff came out with coolant. I then put a piece of hose on the left side and shot water ...

blow hot air even if I turn temp dial to cool. Only way to stop this is to shut truck off, then restart. check dial switch, check valve that lets water run through heater core It is a problem with air

...HOT AIR FROM HEATER,A/C BLOWS HOT AIR,A/C NOT BLOWING COLD, COLD AIR FROM HEATER,BLEND DOOR ACUTATOR CLOSED,HVAC UNIT NOT OPERATING, ...

...hot-air.html---------A/C, heater, defroster fan, not working?http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html--------Heater ...

heater blow out cool air when sitting still and then hot air when going down the road and then it's not all that hot I have flushed the radiator. didn't help For this problem,i suggest you

heater core is working properly but car will not blow hot air only cold air i am thinking the flapper that controls hot \ cold is stuck in the cold air position cooling system and heater core recently

...heater will only blow hot air The air con hasn't worked since I bought car ten years ago but the heater and fan always have but now the heater only blows hot air and the fan is stuck on Isn't your ...

...heater ... My 2005 Jeep Liberty will not blow heat through ... properly. jeep liberty 2002 heat problem/hvac box issue - YouTube ? 3:12 https://www.youtube.com/watch?v=xf22fvcN1hU May 28, 2013 - ...