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Mike S.
Mike S., Chevy Mechanic
Category: Chevy
Satisfied Customers: 7567
Experience:  ASE Certified Master Technician
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Which fuse is for 4WD Control Module, Underhood fuse block

Customer Question

Which fuse is for 4WD Control Module
JA: Have you checked the vehicle's manual yet?
Customer: Underhood fuse block shows Diesel #2 as actuator. Is that it?
JA: What is the model/year of your Chevy?
Customer: 2006 Silverado 3500 duramax allison
JA: Are you fixing your Silverado yourself? What have you tried so far?
Customer: Local off road shop looked at it & said it could be the control module. Have replaced both actuators, switch & shift motor.
JA: Anything else you want the mechanic to know before I connect you?
Customer: Guess not
Submitted: 8 months ago.
Category: Chevy
Expert:  Mike S. replied 8 months ago.

Hi, I am Mike, welcome. I'm reviewing your question.

Expert:  Mike S. replied 8 months ago.

I see a "TREC" fuse in the underhood fuse block, left side of engine compartment.

Here is that wiring diagram,