2000 GMC Sonoma Repair Question
2000 gmc sonoma 4.3
Does it run at operating temp ?
Run engine and check heater hoses by the fire wall if both hot and no hot air inside
problem is in the heater box and blend door or blend door actuator
Also check if it has a heater control valve
68 questions asked
The engin runs at operating temp. The inlet hose gets warm, but not hot and the exit hose stays cool. It is like there isn't enought pressure in the line. Does the blend box stop the flow of the water.
They do not use a valve in this system and blend system was used
as they direct the air thro and over the heater core and or the AC system and fresh air
heater core need to be isolated and flushed
I did that and water runs thru it freely.
If water running thru freely and no heat on the inside ,engine reaching operating temp ,
check blend door operation and i would suspect the actuator on the door
When I say water is rinning freely, It is with the hoses disconnected. How do I get to the actuator.
under the dash on the heater box
i will try to find a picture for you
this a picture of the part and what it look like
let me know