2001 GMC Sierra C/K3500 "truck heater hot" Questions

...heater control stays hot, can't get cool air without turing truck off. I have the same problem, I think the door inside the heater box gets stuck when you turn it to hottest setting. Try going 1/2 or ...

...heater works but air only feels warm if you put your hand to the outlet. Just doesn't seem to be getting as hot as it should. i just bought this truck, so dont know its maintenace history. any ...

...HOT, CHECK THAT BOTH HEATER HOSES (INLET AND OUTLET) ARE GETTING HOT, IF ONLY ONE IS HOT FLUSH THE CORE, IF BOTH ARE JUST WARM THEN THE THERMOSTAT IS DEFECTIVE IN THE ENGINE, REPLACE IT, LET ME KLNOW ...

heater does not blow hot Could be a cooling system problem; Ranges from a leak in the radiator, radiator hoses, coolant reservoir, low coolant, even a bad coolant reservoir cap could cause it. Also ...

...check your heater core. If it is plugged you will loose cooling ability. On that truck the heater radiator dumps heat outside unless you switch it to the cabin. Is there bugs in your

...hot HI. Here is a complete check list that will help you trouble shot thsi issue. You will find the problem in one or more of these areas stated below. 1. Check Drive Belts - The air conditioner ...

...heater will only blow hot air when the truck is going constantly fast. If I slow down or stop, the heater stops blowing hot air. It seems like it is getting worse. check the heater temp. control pot ...

...hot and the heater hose coming out is cold.the heater will blow cold air Possibly the heater core is 90% blocked. open enough to draw hot water in, (hose feels hot) but not enough volume to provide ...

hot heater core has a blockage.heater core and coolant system need flushing. Try flushing or blowing high pressure air through the heater core lines. its sludge build up and need to be flushed through

...heater valve not allowing hot liquid into the core 3: hot/cold blend door in the heater box stuck on cold 4: clogged heater core A clogged heater core will have one hot hose and one significantly ...