2001 GMC Sonoma Extended Cab "heating system" Questions

...heating system changes from heat, defrost, and vent I have a 2001 GMC Sonoma 4x4 with a 4.3L engine. When the truck is under load the heating system will change from heat,defrost, and vent thats ...

98 gmc sonoma heat works of and on its like there is no pressure in the lines going to the heater core unless u give it gas replaced line going to heater core started working now its working hardlt at

I am losing heat even though the heat gauge is almost at 210. What needs to be replaced? You probably have a plugged heater core or radiator.Very common for these models with the dex-cool anti ...

heat loss in my truck i gradually lost my heat.just blows cold air now SOUNDS LIKE HEATER CORE IS PLUGGED. SOMETIMES YOU CAN CLEAN BY FLUSHING COOLANT SYSTEM

No heat at all coming out of the heater!! Replaced the thermostat...still no heat...upper radiator hose is hot..but the lower radiator is not...just warm...there are no leaks anywhere...or any odor ...

heat I have an 1995 gmc sonoma and my heat does not blow out very hot and i cant figer out what the proublem is Considering the age of the car, your heater core could be partially stopped up. Check ...

CANT ADJSUT THE CONTROL ON HEATER AND AIR OK THIS WHAT I MEAN THE AIR COME OUT AT TOP AND BOTTOM BUT NEVER OUT THE VENTS NO MATTER WHAT I PUT IT ON SO WHAT IS MY PROBLEM CONTROL VALVE OR WHAT LET ME ...

1992 GMC Sonoma has no heat, replaced thermostat and water pump make sure all air is bleed from the system then check the heater hoses by touching them they should feel the same temperature if not ...

Is the a/c compressor supposed to cycle while the heat is on? This is on a 2003 GMC Sonoma 4.3 yes it keeps the humity out of the air in you car On many GM products, yes, the AC compressor can and ...

Poor running / idling when it gets hot!!! 2.2 4 cylinder 1995 GMC Sonoma Runs good while cold or if you keep it moving but if I stop off to pick up something or sitting in traffic for long period of ...