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.

What is a 4-wheel-drive service?

IMPORTANCE OF 4X4 SERVICE 4×4, or four-wheel drive, is a drive-train that delivers power to all four wheels at once. If you drive a vehicle with four-wheel drive, you know that you put it through a lot.

How often should you service 4-wheel-drive?

In some cases, no more than 30-36,000 miles. And in some cases it may be as frequently as every 15,000 miles. Also look for any kinds of leaks when you’re under it.

What does service 4WD system mean?

The four wheel drive light means your car has activated four wheel drive. If the Service 4WD light is on, there may be an issue with the system.

What causes 4WD light to come on?

The purpose of the 4 wheel drive light is to indicate when you have engaged 4WD mode by selecting 4H. When the light flashes continuously for more than 30 seconds it signifies there is a problem somewhere on your drivetrain system and that 4WD has not engaged properly.

What is 4 wheel drive service?

4 X 4 Transmission Services Our 4×4 services include: Draining and refilling the Transfer Case with fresh, clean fluid. Draining and refilling the Front Differential with fresh, clean fluid. Draining and refilling the Rear Differential with fresh, clean fluid.

What does service 4 wheel drive mean?

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.

What happens when the service 4 wheel drive message is displayed?

When the trouble codes are stored and the Service 4 Wheel Drive Message is displayed, the transfer case is inoperative for the rest of that particular key cycle. It will test again and reset the message on the next key cycle if the problem hasn’t been fixed. The codes may be stored with or without you requesting a transfer case shift.

When does the service 4WD indicator clear the DTC?

• The SERVICE?4WD indicator remains illuminated for the remainder of the current ignition cycle. • The TCCM clears the DTC once the conditions for setting the DTC are no longer present. • A history DTC clears after 40?consecutive warm up cycles without a fault present.

When does the service 4WD light come on in a Ford Explorer?

Normal operation, the SERVICE?4WD indicator is commanded ON for the remainder of the ignition cycle. Driver is also informed of fault via bulb check. • The TCCM clears the DTC once the condition for setting the DTC no longer present. • A history DTC clears after 40?consecutive warm up cycles without a fault present.

Is the service 4WD worth it?

The only bad part is that it costs to hook it up to the machine. But then again, he has to pay for the machine, and any updates. I think it was worth it since I’ve never seen the Service 4WD message after that.