2020 Chevy 3500 dually locked up while pulling

Steve Macedo · April 15, 2023

While pulling my 11,000 5th wheel trailer today. Going up an slight mountain highway incline at about 50mph. The truck came to a screeching halt. The rear axle left about a 6-8 ft skid mark from all 4 rear tires. As soon as the truck stopped, I was able to get pulled off to the side of the road. Thought we hit something. A look at the tires, driveline and any leaks maybe from the transmission. Nothing ?

Drove about 2 miles up the road at about the same speed it happened again. The truck dash shows no check engine lights, did not flash anything at all. Parked the truck on a flat area and checked again. Nothing.

Let the truck set for 30 minutes and then turned it around and headed back down the hill being super cautious. Made it home with no other issues and even had a steep pull out of a canyon at 35 mph.

This is Friday at 4:30pm. No dealership in sight.

Truck has 58,000 wirh no other issues. Transmission has NOT had its first service.

Thoughts

repairman54 · April 15, 2023

Electronic E brake kicked on since it was the rears? Thought I've seen a post elsewhere on here about it happening to someone else while driving.

Gangly · April 18, 2023

There is another post about this occurring, I'm sure I have read about it recently.

Though that doesn't help you, I believe it was a simply fix if I recall correctly.

Gangly · April 18, 2023

This is for the 1500 Silverado, but it appears to be VERY similar to what you are experiencing.

newdude · April 18, 2023

21-NA-275 Rear Wheel Lock Up, ABS Event, Loud Bang and a Flashing “D” on Driver Information Center (DIC) when Lightly or Moderately Accelerating Forcing an 8-7 or 8-6 Downshift

READ HERE - 21-NA-275 1..2 (nhtsa.gov)