What does the 4WD actuator do?
The actuator is used to lock the vehicle’s differential together when a switch or button engages the 4WD mode in the cabin. To lock the differential, electronic solenoids engage the actuator gears. This is common in the most recent 4WD vehicle models.
Why does my Chevy say service 4 wheel drive?
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.
Why is my truck stuck 4WD?
Four-wheel drive vehicles can become stuck in four-wheel mode due to improper lubrication or lack of use. It is important that you switch to two-wheel drive when you transition to a hard dry surface, as operating in four-wheel drive mode on the highway will decrease fuel efficiency and can lead to damage.
How do I know if my transfer case control module is bad?
What are the symptoms of a bad transfer case motor?
- Difficulty staying in four-wheel drive (4WD): One of the common problems you’ll notice when the transfer case fails is difficulty staying in 4WD.
- Four-wheel drive (4WD) not engaging or disengaging: There are many reasons for 4WD to be disengaging or not engaging.
Where is the transfer case actuator located?
The GM Genuine Original Equipment Transfer Case Actuators are electric motors that perform transfer case shifting in electronically controlled four-wheel drive systems. They are located on the outside of the four-wheel drive transfer case housing.
How do I know if my 4WD is working?
If you want to test your 4-wheel drive, then put your car into 4-wheel drive and then turn the front wheels, left and right, while driving in a tight circle at a very low speed. You should feel them bind up if 4wd is working. One of the easiest ways to see if it is working is to find a steep gravel road or driveway.
How do I reset my transfer case control module?
Cheap way – To clear the codes and reset the computer, pull the 5 amp TCCM fuse, located at the bottom of the fuse box. Wait at least a half hour, and then replace the fuse. Turn the ignition key to run, wait for the 4×4 lights to blink, and then turn off. Repeat 5 times, and then start the truck.
What is the transfer case control module?
The Transfer Case Control Module (TCCM) is the brain behind the electronically shifted GM 4WD systems. The TCCM processes the shift request from the dash mounted mode selector buttons, executes the shift, and verifies the shift was completed.
What are the symptoms of a bad transfer case motor?
Here are some of the most common signs you may encounter when you have a bad transfer case:
- Gear Shifting Issues.
- Difficulty Staying in 4WD.
- 4WD Will Not Engage/Disengage.
- Puddle Formation Directly Under the Transfer Case’s Location.
- Weird Grinding, Growling or Humming Noises.
- 4WD Warning Light Illuminates.
- 4WD Transfer Case.