Question about GMC Jimmy
HI. Here is the only diagram available for your model below:4.3L V6
Concerning the heater:
1. You will need to back flush that heater core or replace it. i would also advise to flush your entire coolant assembly. I'm sure it could use it.
2. Replace your Blend Door Actuator. That will correct the heater door issues.
Posted on Aug 22, 2010
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Posted on Jan 02, 2017
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