[Btiggs28]

I have a 2019 Blazer RS since the end of April. This blazer has the 5 trans setting AWD, sport awd, hill, trailer and 2wd. it has 4,000 miles on the car and all of the sudden the service all wheel drive light comes on. This warning light came on when we were in 2wd. The blazer is at the dealership right now. Cannot expect them to last forever. Has anyone had this issue yet?

 

[Btiggs28]

So the dealership called and it needs a new - rear differential control module.

 

[BlueOx]

Thanks for sharing both the issue and the resolution.

 

[Btiggs28]

Thanks for sharing both the issue and the resolution.

So, the dealership put the new module on and the warning light came back last night. It is scheduled to go back to the dealership on tuesday. I will repost with new details as I get them.

 

[Btiggs28]

They hooked the blazer back up to the computer and it said bad module again. They ran some more test and still no answer to the problem. So, they moved up the chain and called an engineer at GM an ran through everything again. It came down to the wiring that plugged into the module. They replaced the wire and made sure all connections were clean. It has fixed the problem.

 

[Blaze]

Thanks for the info. I'm glad they were able ti fix it.

 

[trailblazer]

Fortunately it was just wiring and not something more complex that could be a problem later on again.