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service 4wd code

whats wrong with my truck?

service 4wd code

Postby bradgmc05 [OP] » Aug 25 2011, 1:16am

Hey guys got an issue with my 05sierra. My info center is flashing service 4wd and the lights on my 4wd buttons are not lighting up and I can't switch into 4wd. Bit some days I start my truck and its fine but still flashes service 4wd. My question is this an electrical problem. Bad 4wd drive switch. Or a safety deal and i need to change fluids in transfer case. Anyone had this issue? Please help.
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Re: service 4wd code

Postby adams99z71 » Aug 25 2011, 3:42pm

i had the service 4wheel drive message come on in my message center/DIC replaced the switch and problem solved. check out this topic service 4wd
nbs99 z71 325ci v8, stock 4wheel disc brakes, no cats, flow master classic 40 series, rhino line, custom fog lights, cb, bully dog tunner, 4:10 locker, airbag load leveling, 205,000miles.
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Re: service 4wd code

Postby Crossram » Aug 25 2011, 11:08pm

Happened on my '99 and it was the switch.
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Re: service 4wd code

Postby Obsession11 » Aug 26 2011, 2:48am

i had the same thing happen to me, but in winter. I did a "reset" by turning it off hit the brake and gas a bunch of times turning the key a few times. After 2 or 3 times of doing that it hasnt done it since, so over 6 months, 4wd is working fine too.
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Re: service 4wd code

Postby bradgmc05 [OP] » Aug 26 2011, 3:07am

Thank you for all of your help guys. I tried new switch and that wasn't it so ill try reseting it see what happens
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