Speed sensor - Stabilitrack, Traction control, steering assist

Chris Dems · August 6, 2022

I have a 17 Silverado 1500 Z71 Black Widow with 6” and 35’s and what looks like the stock ABS wheel speed sensors. I’ve had sporadic instances with Stabilitrack, traction control and steering assist messages (all pop together) and a few times the truck drops to low RPM and all gauges drop…. Only way to get it running was to turn off the truck and start it again. Based on researching these issues and the fact I get the Stabilitrack message sometimes when hitting bumps at slow speeds, and my brake pedal sometimes pulsates like ABS when coming to a stop, I was replacing my front wheel speed sensors. I used GM part 23498355 (rockauto and GM parts site both point to this part# with my vin). I installed the left side and test drove it before doing the right. ABS and traction control messages came up immediately. Thinking it could be a bad new sensor, I swapped to the other new sensor into the left side and got the same thing. Put the original one back in and it’s fine. Any thoughts on why this happened and if it could be the wrong sensor?

Alamojimmy · September 28, 2022

I had the same exact problem.

Did you find out the answer?

Chris Dems · September 28, 2022

1 hour ago, Alamojimmy said:

I had the same exact problem.

Did you find out the answer?

I did, it was related to my speed sensor. The harness side of the speed sensor connector on my front driver side had loose wires. I had my son sit in the truck with the key on as I wiggled different wires around the speed sensor. Every time I touched the wires between the connector and harness, the codes all tripped. If you find the same thing, you can either tighten the wires in the connector with a dental pick or, splice in a new connector. I did the latter to avoid it happening again.

Chris Dems · September 28, 2022

Replacement part for the connector with pigtail was:

GM 19352068

ACD PT3505

Alamojimmy · October 22, 2022

On 9/28/2022 at 2:10 PM, Chris DeMeester said:

I did, it was related to my speed sensor. The harness side of the speed sensor connector on my front driver side had loose wires. I had my son sit in the truck with the key on as I wiggled different wires around the speed sensor. Every time I touched the wires between the connector and harness, the codes all tripped. If you find the same thing, you can either tighten the wires in the connector with a dental pick or, splice in a new connector. I did the latter to avoid it happening again.

Thank you for responding. I didn't see this until I came back to update what I found and guess what???? Same exact problem. Mine was on driver's side as well. Additionally though, just for those having similar issues: I replaced both front speed sensors originally with cheaper ones from Rock Auto. During the trouble I was having on mine I bought a good code reader that does ABS among other things. Only 150 bucks on Amazon. This reader helped me figure out exactly what the problem was with the connector and also, was showing inconsistent and out of range on the sensors that I originally installed. While replacing the connecter, I also bought OEM Sensors both left and right and replaced them. Reset the codes, went for a drive around the block and all is well now. It was great to see all of the lights go out and everything to go back working like it should have.