What does the service 4WD light on a GM Truck mean?

What does the service 4WD light on a GM Truck mean?

The solid lights on the 4WD buttons are telling you where the transfer case encoder motor thinks it is, and blinks on the mode that it is trying to go to after you push the button. If it fails to move to the new position, it goes back to a solid light on the original position and illuminates the “SERVICE 4WD” light.

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.

When does the service 4WD message come up?

Does the “SERVICE 4WD” message come up as soon as you start the truck, or does it only activate after you try to select a mode other than 2 Hi?

Can a 4WD Chevy Silverado be serviced on YouTube?

*EASY FIX!* SERVICE 4WD Chevy Silverado/GMC Sierra – YouTube *EASY FIX!* SERVICE 4WD Chevy Silverado/GMC Sierra If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

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.

The solid lights on the 4WD buttons are telling you where the transfer case encoder motor thinks it is, and blinks on the mode that it is trying to go to after you push the button. If it fails to move to the new position, it goes back to a solid light on the original position and illuminates the “SERVICE 4WD” light.

Does the “SERVICE 4WD” message come up as soon as you start the truck, or does it only activate after you try to select a mode other than 2 Hi?

*EASY FIX!* SERVICE 4WD Chevy Silverado/GMC Sierra – YouTube *EASY FIX!* SERVICE 4WD Chevy Silverado/GMC Sierra If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

When did my 2003 suburban 4WD system fail?

When my 2003 Suburban’s 4WD system failed, I was 4 hours from home with my travel trailer! The front axle was halfway engaged, so it produced a gut-wrenching grinding noise during turns for the entire drive home. However, I fixed it myself-and I bet you can, too!

Where is the encoder motor on a GM transfer case?

Access to datastream information for GM’s NVG 246 system makes most problems simple to locate and diagnose, as our case studies demonstrate. These systems also allow bidirectional control for many outputs. The encoder motor (arrow) is mounted on the front of the transfer case and is used to lock it into 4WD.

Can a transfer case be changed in a 4WD truck?

The entire motor can be replaced, or just the less expensive encoder inside can be changed. The transfer case encoder motor moves the transfer case selector automatically. In Auto 4WD, it continually moves the input shaft of the transfer case to vary the amount of torque that goes to the front driveshaft.

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