Mike54321

I just hit 70,000 and my 2018 GMC Sierra Denali and it rides like crap now. I have not hauled anything. I drive highway miles. I keep my truck maintained and spotless. I can't believe there is no info on how to troubleshoot, reset, diagnose........nothing on this topic. There is so little information on this. Maybe there is no information because myself and three other people on the planet are the only four people to have an issue with MRC. If that is the case, then I really should not complain. Myself and the other three people are just the unlucky four that have issues on the thousands of different vehicles with the MRC. You would think that someone would realize there is a problem when all four SHOCKS fail at the same time. Is there a way to find out if it is all four????? or is that what we are told to get us to buy four instead of one? I just need a little direction on how to get it diagnosed or can I unhook the battery to reset it or can a reader be hooked up and if there is a code....can it be reset???????