THE HEATER DOOR OR VALVE IS STUCK.

2003 GMC Sonoma

Tiny

desmith2450

January, 1, 2012 AT 5:39 PM

Two years ago the heat would only partially work then something poped & it worked perfect! Now it's doing the same thing. Some say it's a valve or adoor that's not opening all the way. Some say heater core.

FOUND 72 RELATED QUESTIONS

1 Answer

Tiny

CJ MEDEVAC

January, 1, 2012 AT 5:53 PM

LOOK THIS OVER--THEN CHANGE MY SEARCH WORDS--YOU MIGHT TRY COMBINATIONS OF--YEAR--HEATER--DOORS--HVAC--SONOMA--ACTUATOR--MOTOR--ETC---ANYTHING YOU PUT, WILL GET DIFFERENT RESULTS

http://www.youtube.com/watch?v=ow7LdPrL08I

LET ME KNOW HOW IT GOES

THE MEDIC

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