Noobie: Service 4wd light
November 3rd, 2016, 11:05 AM
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Noobie: Service 4wd light
Hello all, I have a 2000 Silverado 1500 Z71 5.3L and I'm having an issue with. The "Service 4WD" light stays on. I bought a transfer case switch for it but that didn't fix the problem. I don't have any lights glowing on the switch, none of the buttons seem to work. The truck runs fine but can't switch into Auto, 4 Lo or 4 Hi. Had a friend hook it up to his GM scanner reader but it's not showing any error codes. I'm curious if I bought the Dorman 600-101 4x4 actuator from Autozone if that would fix my problem? I'm not sure if the actuator would solve the lights in the dash or not. I also heard that it might be the Transfer Case Control Module?? I looked in the area near the emergency brake but didn't see it. I did see the "CTTF" but that's not the TCCM is it? Don't want to keep throwing money out the window. I bought some transfer case fluid for it but haven't changed it yet? What else could it be?
November 3rd, 2016, 5:32 PM
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Yeah I'm gonna try the transfer case actuator on Saturday, just bought one from Advance Auto so I'll pick it up Friday afternoon. I hope this does it but if not I guess it'll be the transfer case control module and that looks like a tight squeeze. I'll let ya'll know how it goes...fingers crossed.
November 3rd, 2016, 5:35 PM
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It usually is not an electronic problem. Replace the solenoid (actuator), my $ is that it's the fix. Iv'e had to replace that, and the switch, I read where you replaced the switch.
November 4th, 2016, 6:41 AM
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November 8th, 2016, 6:08 AM
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Well I replaced the transfer case actuator but that didn't fix the problem, so I took it back to Advance Auto. Well the only other thing I can think that it might be is the (TCCM) Transfer Case Control Module. That looks like it might be a job taking the dash out and whatnot. I looked for it but didn't see it. I did see the CTTF, I'm guessing it above that?