Seabrook11
New member
Started getting "Service Axle Lockers" message after startup. It disappears and the lockers appear to be working. Anyone else experienced?
Service Axle Lockers warning
- Thread starter Seabrook11
- Start date
gbyles1313
New member
Yes mine goes off constantly now and I have been waiting for the the dealer to replace the sensor however they can not get the part.
WeatherMan
New member
I do have the same problem on my AT4x 2022
Did all the investigations and changed some parts on warranty but still same massage is popping up started to become very annoying .
Welcome.
Welcome.
Welcome.
Makes me think of the obs early days...
The front axle actuator was a common fault. It used a thermal heating element to expand the actuator rod to engage the shift fork. gm came out with a revised actuator in the late days of the obs with a gear/screw driven type. It would work on the older models, but you had to tie into the wiring harness above the tranny for power or signal. Sorry been too long ago to remember.
If'n it's not too expensive I'd keep a spare on hand. And if yall know your going in the deep, take it along!
Cause it was common practice to engage 4x4 to see If'n it would work before the snow bank or mud puddle. 
The front axle actuator was a common fault. It used a thermal heating element to expand the actuator rod to engage the shift fork. gm came out with a revised actuator in the late days of the obs with a gear/screw driven type. It would work on the older models, but you had to tie into the wiring harness above the tranny for power or signal. Sorry been too long ago to remember.
If'n it's not too expensive I'd keep a spare on hand. And if yall know your going in the deep, take it along!
Cause it was common practice to engage 4x4 to see If'n it would work before the snow bank or mud puddle. GMC AT4 Forum Photos
GMC AT4 Forum Photos
