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Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 16751
Experience:  15 years GM master tech
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I have a 2003 silverado 4wd and the electronic shift control

Customer Question

I have a 2003 silverado 4wd and the electronic shift control lights up at starting on all lights but goes black after innitilization. what causes that?
Submitted: 1 year ago.
Category: Chevy
Expert:  Gary replied 1 year ago.

this is usually a sign the 4WD module is not getting a case position signal back from the transfer case encoder motor

can you be sure the fuses called TREC in the under hood fuse box and see if the fuse called 4WD in the inside fuse box is good ?