vent issue 87 GMC

Asked by RC4DC Jun 27, 2019 at 10:40 AM about the 1988 GMC Sierra 3500 C3500 Extended Cab SB

Question type: Maintenance & Repair

I have 87 GMC 3500 and I have pulled most of the dashboard off in order to
see the vent doors. it appears that the doors are working. no air coming out the
dashboard or defrost vents. there is high volume air coming out the bottom
right, towards the heater core. where do i start in order to fix?

1 Answer

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