Service 4wd - Truck Forums


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Old 02-25-2012, 05:29 AM
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Join Date: Jan 2012
Location: Ottawa, Canada
Posts: 8
Default Service 4wd

2002 GMC Sierra z71
Hey guys n gals! So I got off at 5 this morning after plowing snow for the last 15 hrs, and when I started my truck service 4wd popped up. Yay I don't feel left out anymore! Good thing I had my genisys in the truck n scanned her right away, got code C0309 motor A/B circuit high. Anybody have the same problem? Or know what the most common problem is? TCCM? TC motor?(hope not!) Any help is greatly appreciate.
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2002, 2012, 4wd, ab, c0309, chevrolet, circuit, code, gm, gmc, high, motor, service, sierra, silverado

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