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John, ASE Master Technician
Category: Chevy
Satisfied Customers: 614
Experience:  ASE Certified Master Technician, ASE Certified Service Consultant, 22 years professional experience
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I have a 1999 s10 4x4 zr2 code po758 keeps coming back I

Customer Question

I have a 1999 s10 4x4 zr2 code po758 keeps coming back I think its the transmission control module but I can't find it .
JA: Do you have a scan tool to read the codes?
Customer: yes
JA: What is the model of your '99 Chevy?
Customer: s10
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yes I have changed the b solenoid
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Chevy Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Chevy
Expert:  John replied 1 year ago.

Hello, my name is John.

The test for this code is pretty straight forward with testing the solenoid, but since you have already replaced it then I agree this is probably a computer problem as long as the wiring is all okay. There is no seperate transmission computer for this vehicle. The transmission is controlled by the engine computer or PCM (Powertrain Control Module).

Please let me know if you have any additional questions about this repair.