I’m new to the forum, came here because I’m having issues with my ‘14 Sierra SLE V6. I bought it used in November at 36k, now it has 48k miles.
I did have issues with the AFM when going from V6 down to V4 but plugged in a Diablo Sport module.
Yesterday when I was running errands, I would have a severe shaking right after cranking it up, after putting it into and while in reverse, and after I come to a complete stop after braking.
I did notice the RPMs would drop to 4-500 while this would happen.
All other components are stock aside from the module.