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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

2013 suburban service 4wd message came on when in Auto

Old June 8th, 2019, 12:45 PM
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Default 2013 suburban service 4wd message came on when in Auto

After starting the car and just driving in normal conditions, not using 4wd (hardly ever even) I got the “service 4wd” message.
Has 80k miles
does anyone have an idea what this could be? Is this fairly common? I’ve seen a lot of forums with people having this error message while using 4wd, but this was just driving to the grocery store on a normal dry day. Thanks
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Old June 8th, 2019, 7:25 PM
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Originally Posted by QuercusE36 View Post
After starting the car and just driving in normal conditions, not using 4wd (hardly ever even) I got the “service 4wd” message.
Has 80k miles
does anyone have an idea what this could be? Is this fairly common? I’ve seen a lot of forums with people having this error message while using 4wd, but this was just driving to the grocery store on a normal dry day. Thanks
Are you getting any drivetrain codes? I am not a fan of the automatic four-wheel drive transfer-case systems on any vehicle, so I am no expert on them, but I have seen this issue show up before here.

I am jaded as I used to own a Jeep CJ-5 with solid-axle (Dana-30) manual Warn locking hubs and floor shift 4WD and a 4-speed stick. no automatics at all. Back then there was no A/C; the heater wasn't very strong and if you wanted a AM/FM/C/D player, it didn't come from the factory. AM radio only and the tachometer was a $150 dollar option. Did have power steering and power front disk brakes however. The 258 cubic inch I-6 mill was solid as a rock too.

That said, I cheated and visited a 4X4 GM forum and it seems that the fix *might* be easy and cheap as it only involves replacing the drivers 4WD dash control switch, which runs around $30 USD, including shipping. This is what I found:

Transfer Case Driver Control Switch GM# [email protected]/oem-parts/gm-switch-25878425] https://www.newgmparts.com/oem-parts/gm-switch-25878425

I hope that that will help you out and that it works, but I cannot assure you of that, only going by the words of others in your predicament, not my experience. Also it seem that no codes will show up with this issue either, which seems to involve the circuit board not being properly designed, cracking, or poorly manufactured, likely in Asia.

Last edited by oilcanhenry; June 8th, 2019 at 7:28 PM.
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Old June 9th, 2019, 7:31 AM
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It more than likley is the switch, do you have the indicator led on (on the switch)
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Old June 9th, 2019, 8:11 PM
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When's the last time you had your transfer case fluid checked or changed?
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