Well I was taking a trip to the ATV shop ,passing by the GM dealer lot I see a 3rd gen AT4. Unfortunately I left my phone at home, so no pictures. The truck was not able to be test drove by general public. Sales rep said it was for dealer to learn more about and drive. Anyway, what a beautiful...

OK so... I've come across a lot of references to this issue. Has anybody EVER gotten a straightforward solution? Also, I was informed by a GMC service manager that despite being solely emissions-related, and throwing Emissions codes when there's a problem, GM classifies the DEF delivery...

I have a 2018 Colorado Diesel, bought used a year go with 50k miles, now up to 70k miles, have towed a 22ft 4000lb travel trailer (loaded weight) around 5000mi in the last year and I have two issues. Truck is rated at 7700lbs towing capacity (only one piece of the equation but keeping it...

Good Morning All! I have been lurking for some time and have a 2018 babymax. First time poster. I know some of you have quite extensive knowledge and I am hoping someone can point me in the right direction. I had the reductant heater code and it caused a Check Engine light. This happened to...

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