Why does my dash say Service 4 Wheel Drive?


Asked by Dec 01, 2014 at 02:14 PM about the 2008 GMC Sierra 1500 SLE2 Crew Cab 4WD

Question type: Maintenance & Repair

Service 4 wheel drive in dash indicator comes on and lights go out on the transfer case switch nob.  If I turn off the engine and wait for 10 min. then start truck everything is ok. and I can turn nob to whatever location I want and it will shift. But I can drive for 3 miles or hundreds of miles and the indicator will eventually come on again no matter what position the transfer case is in.

4 Answers


only guessing, but maybe check the fluid level in the case

2 of 2 people found this helpful.

For anyone that might be interested it turned out to be the actuator. Sometimes it works and sometimes it did not.

8 of 8 people found this helpful.

blackrobert I have a 2015 Sierra Denali. An indash warning came on this morning telling me to "service 4WD". I thought i had my knob set to "auto". After looking I noticed that it was still in 2W. I tried to change it to auto and the indicator light would not come on. after turning off truck, then back on i noticed that everything had returned to normal. could this be the same issue as yours back in 2014? What actuator was found to be faulty. thank you in advance. Roger

I'm having the same problem in the 2008 Sierra 1500 Z71 package. If traction control is turned off the 4x4 seems to work even tho the Service 4WD message is showing. For such a common problem there should be specific answers, or this is just a piece of crap engineering.

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