1998 GMC Sonoma "truck heating" Questions

Truck 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

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 from heater on 01 sonoma x cab I have a issue , no heat /little heat from heater eng temp 190/220 top hose to firewall is cool ,bottom hose is hot,is there a valve in side cab that could be ...

over heating , antifreeze leeking from that water over heating , antifreeze leeking from that water pump Hello, If your water pump is leaking from the water pump for sure that is causing your over ...

...the problem for the control valve not opening.(Turn the fan off) I'll assume this is a late model

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 ...

fan works good heat turnes on and off. the heat will work for about 30 seconds then turn off for about 30 minutes it goes on and on like this. try changing your thermostat

when i put the heat on my 2003 sanoma blows cold air the most common problem is thermostat. Replace thermostat and gasket, top up coolant and you should have heat.

blower motor 1995 gmc sonoma heat doesn't work all the time. works once in a while can feel heat coming from vent but cant hear the fan working. does work once in a while when I mess with the blower ...

where is the thermal flasher on a 1999 gmc Sonoma located at? Sorry Jason you need to clarifiy what part your talking about . Thermal /heat flasher /flash is the vehicle over heating ? Iknow of no ...