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.

3 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.

7 of 7 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

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