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

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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.
 

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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.
 

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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? View attachment 181
I'm really glad you posted this. I also have a 2019 Blazer RS with 3600 miles and the same thing happened in mine today. I will be calling my dealership tomorrow and referencing your issue/resolution. Thanks for sharing!
And by the way your Blazer is stunning! Mine is white and I love it.
 

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I'm really glad you posted this. I also have a 2019 Blazer RS with 3600 miles and the same thing happened in mine today. I will be calling my dealership tomorrow and referencing your issue/resolution. Thanks for sharing!
And by the way your Blazer is stunning! Mine is white and I love it.
I hope everything works out for you. We ended up getting our module replaced a total of 3 times and wiring the last one seems to be doing what it is supposed to. We know have a case file setup with GM and if it happens again they are sending a GM Engineer to our local dealership to work on the issue.
When we purchased they had White and our color, it was hard to choose between them. We love our Blazer and everything has worked out so far.
 

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I hope everything works out for you. We ended up getting our module replaced a total of 3 times and wiring the last one seems to be doing what it is supposed to. We know have a case file setup with GM and if it happens again they are sending a GM Engineer to our local dealership to work on the issue.
When we purchased they had White and our color, it was hard to choose between them. We love our Blazer and everything has worked out so far.
Yes, your color would have been runner up for me, I love it. The RS is the nicer looking option for sure.
So, the service message is gone in mine now and the AWD light is back on but I'm taking it in this week anyway to run the code history.
Enjoy your beautiful Blazer!
 
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