Question: Service 4 Wheel Drive

Randy822

New member
Apr 21, 2012
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:confused: Periodically I get Service 4 Wheel Drive on my 2002 Duramax 2500HD. It works just fine. What is there to service? I get the fluid and filters changed when due via mileage reading.
 

OregonDMAX

NOT IN OREGON, NO DURAMAX
Apr 28, 2013
3,964
8
38
36
Goodyear, AZ
does it to mine too when i stop in a drive through and shut the truck off without putting it in park and then start again in neutral. 4wd works perfectly so i don't even worry about it.
 

07.5 LMM

New member
Jan 6, 2012
30
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Reading, PA
it could be the speed sensor or even a glitch I wouldn't worry if it works fine. I would check the fluid if you haven't in a while, ATF is known to evaporative in transfer cases.
 

Randy822

New member
Apr 21, 2012
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Thanks guys. The indicator does not stay on constantly. Just appears maybe once or twice a year. I may have someone read the computer just in case but I don't think it will show a code. I do follow maintenance to the T with all my vehicles. My Duramax has been a great truck thus far. It does have a slightly rough idle in park though. Any suggestions on that?
 

Balindir

Rod shortning in progress
Jul 30, 2012
364
0
16
South Central, Pa
Had this problem, but my 4wd didn't work... and it wouldn't shift, turn the truck on and off a few times and wiggled some fuses and it went away and 4wd worked again. Never happened after that... so it could be something stupid like that...
 

Randy822

New member
Apr 21, 2012
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It would be nice but I doubt so simple. My 4 Wheel drive works good. That light coming on maybe twice a year does bother me. I will take it to a mechanic I know next week to see if there are any codes. Now and then I will start it up and it's in 4 wheel low. I hold 2 wheel and 4 weel low buttons at the same time for a few seconds and it clears up.
 

Mike L.

Got Sheep?
Staff member
Vendor/Sponsor
Aug 12, 2006
15,681
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63
Fullerton CA
If something goes wrong with your TC, you are hoofing it. Doesn't matter if it's a simple electrical problem or a serious mechanical problem. You are screwed. Yor tow bill will cost as much as the repair and when it gets to the shop ; you will still need to cough up some big money to fix it. So, just ignore that stupid light and rock on.:woott:
 

Randy822

New member
Apr 21, 2012
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I am not one to ignore potential problems so I will continue to get the light analyzed. No tow bill for me...I will push it in. LOL