Question about Cars & Trucks
It depends on the problem. The system uses a programmer to control blend doors and the blower. The blend doors are controlled by vac and-or electric motors. When the temp flashes it is detecting a problem and may go into default mode.
You may need a scanner to access the body computer to diagnose it.
One of the blend doors is behind the glove box.
Posted on Dec 11, 2012
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Posted on Jan 02, 2017
Ii had the same problem, fixed it temporarily by detaching the battery for a moment, this reset the blinking temp display. Nevertheless, the solution to the problem was filling the air condition up with coolant.
Posted on Feb 08, 2009
there is a fuse box under the hood and if you are talking about the blower the relay for that is in the blower itself here is a place that sell only GM parts only it is Schram auto & truck parts and the # is 1800-292-1032
Posted on Feb 14, 2009
Check the temp of the heater hoses going into the heater from the engine in the engine compartment.
If you have a temp gauge on the dash does it go at least 1/3 the way up the gauge from cold in normal driving.
You can take a garden hose and flush the heater....both ways back and forth then reconnect heater hoses and check for heat.
But.....The # 1 cause of no or low heat is the engine thermostat.
It needs to close tightly to force the engine coolant through the small heater core.
Posted on Nov 10, 2009
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