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Driving mode possible issue

J

Jamesogars

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Dec 3, 2021
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Hey guys new to group and AT4. I just purchased a 22’ AT4 limited and noticed when selecting different driving modes, it will not let me select sport mode it scrolls right past it. I guess I’m wondering if this is normal or should the truck be brought back to dealer to have it corrected. The salesman said it was normal but hardly believe everything they say. Thanks for the input.
 

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Jamesogars said:
Hey guys new to group and AT4. I just purchased a 22’ AT4 limited and noticed when selecting different driving modes, it will not let me select sport mode it scrolls right past it. I guess I’m wondering if this is normal or should the truck be brought back to dealer to have it corrected. The salesman said it was normal but hardly believe everything they say. Thanks for the input.
Click to expand...
Truthfully I haven’t used the different modes yet. I will this weekend and let you know. And Congrats and welcome!
 

My 22 Limited does the same, skips over sport mode. I figured it was because of a software controlled “break in” period. The manual says there is a 500 mile break in and it does mention not flooring it from a stop. So that may be something? I keep meaning to reach out to my dealer to ask about it, just haven’t done it yet.
 

BlackAT4 said:
My 22 Limited does the same, skips over sport mode. I figured it was because of a software controlled “break in” period. The manual says there is a 500 mile break in and it does mention not flooring it from a stop. So that may be something? I keep meaning to reach out to my dealer to ask about it, just haven’t done it yet.
Click to expand...
I was also thinking it might be a break in thing. I only have about 100 miles on truck. I’ll reach out to service this week and see what they say.
 

I just broke 300 miles. I’m glad I found someone else with the same thing, I searched and searched and couldn’t find anyone else or any info on it. I thought I was just my truck at first.
 

I know mine worked after 500 miles. Not sure about before. May be a break in period but I want to say I tried the switch driving home from the dealer, with about 200 miles and it worked fine. Could be wrong though. Let us know what they say.
 

I called service department today at dealer today. They said there is a TSB out for it. Has something to do with duratrack tires and sport mode. Makes no since to me because the 21 and older had duratracks on them and sport mode works on those. I called another dealer and they knew nothing about it. First dealer said check with us in a while because GMC is working in a computer update to remove it.
 

Just got this from another source.
 

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