What does service 4WD mean on gmc yukon?
Problem Description The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.
Is there a service 4×4 light on a GMC Sierra?
Service 4×4 Light On: Service 4×4 Light on Dash. 2003 GMC Sierra Service 4X4 light on. Service 4×4 light on dash. 2003 GMC Sierra 1500hd 6.0 4L80E, fully automatic 4×4. Has been working on and off.
Is the service 4×4 light on or off?
Service 4X4 light on. Service 4×4 light on dash. 2003 GMC Sierra 1500hd 6.0 4L80E, fully automatic 4×4. Has been working on and off. Usually the light is off after a few days, then the 4L lights up and stays on even though I am driving freeway speeds, transfer case is in 4H but dash says 4L.
Why is my 4WD service light not working?
It would engage into lower gear in 4lo but wouldn’t actually go into 4wd. Taking a closer look at the wires, I noticed that there is a small ground wire that was hidden in the tube that got unconnected. Simply put a new connector on it and works like a charm now! I hope this helps you with your 4wd service light issue!
How to install service 4×4 light on Dash?
Carefully position the new encoder sensor to the large gear aligning the key way slots. Just begin the insertion of the keyway over the key. Press the sensor onto the large gear using a inch deep well socket. This will ensure proper installation of the sensor. Notice: Not using the socket to press the sensor on may result in damage to the sensor.
Why does my Yukon XL have a 4WD light?
I was recently getting a service 4wd light in my 03 yukon xl. the lights for the switch also went out. I crawled under the truck and started looking at connections to the transfercase. I found that one of the connections had a small amount of corrosion in it. I pulled it apart, sprayed it with contact cleaner and reassembled.
Why is the service 4WD light on on my GMC?
Some customers may comment that the Service 4WD light is on, the 4WD system is inoperative, the 4WD switch indicator lights are blinking or that a grinding noise is heard from the front axle.
How can I get my GMC Yukon XL back to 4WD?
Service 4WD notice routinely reported on dash. Inability to change 2WD to 4WD (or back) particularly after extended running period. Periodic solution by turning ignition off then back on, but solution is unpredictable. My Truck is stuck in 4WD Low.
When does the 4WD warning light go out?
When the ignition key is cycled from OFF-RUN-START and is released back to the RUN position after the vehicle starts, the 4WD warning light should illuminate for 1 to 2 seconds and then go out. If it stays on, or the “Service 4WD System” message is displayed, there is a problem with the 4WD system.