Having problems with your 1999 GMC Safari ?

Ac air flo control

\015 Stuck on defrost\015 Posted / edited by AnonymousUser on : 19-11-2018

Answers :

You will need to go through your lines on the vacc and find the leak normally its a seal right at the vaccume motor or a cracked tube on earlier years good luck im in the same situation at the moment
I think this uses the same system the pickup trucks use - which is a small electric motor to move the blend doors. If so, the motor is probably bad.
If it uses a vac system, you have a vac leak so no vac to pull the blend door actuator.
Repair Help & Product Troubleshooting for 1999 GMC Safari

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