Stupid electronic 4wd - The 1947 - Present Chevrolet & GMC Truck Message Board Network

b454rat · 11-24-2017, 07:19 PM

I got a 98 Tahoe with the Autotrac 4wd. At first nothing worked, but I thought the buttons lit up. Then they didn't, all the time being in 2wd. I got 2 TCCM's from the junkyard, plugged them in and nothing. So checked the fuses again. I missed one, and it was blown. So now the lights are on, no service 4wd light, but it's now stuck in 4wd. I'm guessing it's the motor in the t-case, but does the front actuator go thru the t-case or just wiring? Where do I need to look now?

11-24-2017, 07:19 PM	#1
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,453	Stupid electronic 4wd I got a 98 Tahoe with the Autotrac 4wd. At first nothing worked, but I thought the buttons lit up. Then they didn't, all the time being in 2wd. I got 2 TCCM's from the junkyard, plugged them in and nothing. So checked the fuses again. I missed one, and it was blown. So now the lights are on, no service 4wd light, but it's now stuck in 4wd. I'm guessing it's the motor in the t-case, but does the front actuator go thru the t-case or just wiring? Where do I need to look now? __________________ 2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 6” lift 1999 GMC Yukon 350/4L60 4" SAS

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