Jonathan Ortiz

Hello to all I have a 2021 GMC Sierra crew cab short bed 4wd that I am ready to begin modding first and foremost I need some help with the lift kit. I have found a reasonably priced bds kit its a 4 inch snap ring coiler kit. does anyone have this installed and if so is it worth cutting the crossmember? what would be a good wheel and tire combo for this setup. I like the idea of 18X9 zero offset wheels and 295/70/18 mickey Thompson baja boss at3. thanks in advance for any and all help

Hi RC I have a 21 5.3 sierra with 12,000 mi and I’ve noticed multiple times when I come to a light I feel a slight rumble under my seat and a little rattle behind the center dashboard. I explained to the service advisor on my last service what was going on but i was told no light no issue so far I’m the only person who feels the shake and until coming across your post I thought I was crazy. Do you happen to know what service bulletin I need to look up so I have some proof of my issue?