What does it mean when it says service 4WD?
The “Service 4WD System” message indicates a problem with the 4WD system that should be properly diagnosed and repaired. When the ignition key is turned from OFF-RUN-START and is released back to the RUN position after the vehicle starts, the 4WD warning light should go on for 1 to 2 seconds and then go out.
How do you activate 4×4 low?
To engage low range, stop your 4×4, put it into Neutral or Park, and use your dial to switch from either 2H to 4L, or (assuming you’ve been in 4H in the lead-up to the low-range terrain you’re about to tackle) 4H to 4L.
What is the GM service 4 wheel drive message?
GM has issued a service bulletin # 09-04-21-001 to address a Service 4 Wheel Drive Message condition on the vehicles listed below. In addition to the Service 4 Wheel Drive Message, you may also have a C0387 or a C0569 trouble code stored.
Why is my service 4WD indicator not working?
If the wires are broken, the actuator won’t operate and the actuator won’t move. If it does not move to the proper position, the buttons on the dash will blink and the “Service 4WD” indicator will be lit because the TCCM never sees a complete 4WD engagement. The ground wire to my front axle actuator was the culprit on my truck.
Why are there no lights on my 4WD?
In a nutshell, for about a year I get “Service 4WD” message but goes away after restarting the car. Last week the message does not go away after restarting the car so I pull out the selector switch and resolder the joints then plug it back in to find that the “Service 4WD” message is gone but there are no lights at all.
Why does my 4 wheel drive not engage?
The transfer case could pose another reason why your 4 wheel drive fails to engage. This could be due to the vehicle not coming to a complete stop to allow it to engage. This is because the splined pin and gears of the actuator need to align 100% with the gears inside the transfer case.