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Author Topic: Service 4WD  (Read 359 times)

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  • I love the Chevy Avalanche
Service 4WD
« on: May 7, 2018, 15:48:19 PM »

New to the forum. I been reading about the service 4WD error message in the DIC and determined it was the sensor in the transfer case position sensor which I replaced. I did test the switch in the dash first using a dandy youtube video explaining the ohm reading per the switch selection and all the readings were in ohm range. I was excited to finally not have the error message but after the sensor replacement the error came back almost immediately. Question I have is I think it only can be 2 things. Either I have to replace the whole sensor motor unit or possibly the switch is still no good, maybe I didn't test it right? Anyone have any ideas? Important to note that I have no issues with driving it slipping out of 2WD but occasionally I have trouble getting it into 4WD
« Last Edit: May 7, 2018, 15:51:50 PM by mzootie »
2006 Chevy Avalanche


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Re: Service 4WD
« Reply #1 on: June 21, 2018, 16:58:05 PM »

I replaced my switch, still get the msg. Removed and looked over the servo that does the work to go from 4 X 2 to 4 x 4 (I don't care what GM called it; it's a servo not a controller) and it looks /works fine. There is a brain box behind the pass. kick pnl that is the brain box for this thing. I can't learn any thing about it except it's cost  (for me) a lot of money. My tranny guy read for drive line codes and it showed no codes stored.
EDIT: I can't find the controller behind my head light switch or behind the passenger kick panel or any where else. Anyone know where it is on a 06 1500  Z71?.
« Last Edit: October 20, 2019, 15:54:15 PM by dna9656 »
2006 Chevy Avalanche,Z71, Upgraded to 4L65 E 2007 Standard 17" Chevy wheels but not the right year or style, new tires, exhaust, U joints, shocks, rear axle bearings and seals. New Driver's seat belt.  2007 Chrysler Sebring, 7  Yamaha motorcycles 6 Venture Royales 1 Road Star, 2 run, others for parts. 2 dachshunds, 1 house. 1 wife.
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