CHEVY

2004 Chevrolet Avalanche

Tiny

brian j decato

January, 21, 2010 AT 8:35 AM

Heater problem
2004 Chevy Avalanche V8 Four Wheel Drive Automatic 100000 miles

no heat

FOUND 4984 RELATED QUESTIONS

No Heat

37 ANSWERS
5 IMAGES

1 Answer

Tiny

Scotty Dee

January, 26, 2010 AT 11:54 AM

Check the operation of the blend door on the passenger side below the glovebox. Verify the HVAC controller is sending commands to the blen door actuator. If the coolant level is correct, the thermostat opens and closes as it should, and the blend door works, the heater core could have debris. Does it have Dex-Cool that is older than 3 years in it?

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