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GMC
C1500
Climate Control
Blend Door Actuator
1998 GMC C1500
18,000 MILES
ANONYMOUS
MEMBER
1 POST
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how to troubleshoot problems with heat doors, like blend door etc.
Feb 13, 2013 at 12:30 AM
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JACOBANDNICKOLAS
CERTIFIED EXPERT
110,175 POSTS
The blend air door is near the heater core. Basically, you need to see if the door reacts when you change from heat to cool air.
Feb 13, 2013 at 12:32 AM