Why is the service 4WD light on on my GMC?

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.

What does the blinking 4 wheel drive indicator mean?

So what is that 4 wheel drive indicator blinking on your dashboard means? 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.

Why does the 4 wheel drive light stop flashing?

The transfer case neutral position needs to be selected before you attempt to engage 4WD. The selected position indicator light will flash until the transfer case completes the shift. When the shift is complete, the indicator light for the selected position will stop flashing and remain ON.

Where is the service 4×4 light on the dash?

Technicians may find DTC C0327 in the Transfer Case Control Module (TCCM) and/or DTC P0836 in the Transmission Control Module (TCM) and/or DTC P0500 and P1875 in the Powertrain Control Module (PCM). It is possible that the module may be in a mode that will not allow any shifts or updates for the software or calibrations.

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.

So what is that 4 wheel drive indicator blinking on your dashboard means? 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 does the 4 wheel drive light mean?

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.

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.

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.

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.

How often does the 4WD light come on on a Silverado?

Question: I have a 2005 Chevrolet Silverado and my SERVICE 4WD light comes on about once a week. When the light is on, the truck won’t engage into 4-wheel drive. When I turn my truck off and start it again, the 4-wheel drive will work until the next time the light comes on.

Why is my GMC Yukon stuck in 4WD?

Has gone into 4WD LO mode by itself. Can’t change drive mode. Problem and message will go away for weeks sometimes. When I start my 2005 GMC Yukon, it will often times, by stuck in 4WD and won’t switch to 2WD when I push the 2WD button.

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.

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.

Where is the 4 wheel drive select switch on a 2000 Chevy Silverado?

Pop them off and pull the dash plate off. To remove the four wheel drive select switch there are little plastic locks on the top and on the right, hold them up and pull out. Turn the switch over and look for the part number on the back. Mine is a 2000 Silverado Z-71 Extended Cab. The part number is the longer of the two – 15709327.

Is there a 4WD light on a 2000 Chevy Silverado?

Mine is a 2000 Silverado Z-71 Extended Cab. The part number is the longer of the two – 15709327. I believe they used this part for 1999, 2000, and 2001. You can purchase the part, APDTY 012173 4×4, Four Wheel Drive 4WD Transfer Case Selector Button Switch. Replaces GM Part Numbers 15709327, or 19168767, from amazon by clicking the link below.

Pop them off and pull the dash plate off. To remove the four wheel drive select switch there are little plastic locks on the top and on the right, hold them up and pull out. Turn the switch over and look for the part number on the back. Mine is a 2000 Silverado Z-71 Extended Cab. The part number is the longer of the two – 15709327.

How to fix a PRNDL light on a GMC Truck?

To fix this problem, remove the cluster from the vehicle. Then remove the instrument cluster housings, see the most current repair information for the vehicle you are working on. . Inspect the PC solder joints (circled area) carefully with a magnifying glass. Lookin for cracks in the solder at the top or bottom.

Why does my 4WD light come on on my Chevy Silverado?

There is a common problem with 1999-2001 Chevrolet Silverado where the service 4wd light comes on in the vehicle. The light is scary and led me to believe there were major issues with my four wheel drive, but it turns out its a quick, cheap, and painless fix by swapping out the 4wd selector switch.

How do you remove a 4 wheel drive light?

There are about a dozen points where it connects. Pop them off and pull the dash plate off. To remove the four wheel drive select switch there are little plastic locks on the top and on the right, hold them up and pull out. Turn the switch over and look for the part number on the back.