[mrallard11]

When I hit my brakes, the rear brakes make two knocking sounds and I can't figure out what it is. Every things been torqued to spec.

 

[lkurek]

That's a lot to work with..... 😕

Could be pads moving in caliper, maybe wheel not torqued down enough and lugs moving in rotor, maybe it's inside your differential, perhaps your pinion brains are worn, maybe your suspension bushings are worn out.

That's about it

 

[mrallard11]

I'm about to blow this thing up istg chevy needs new engineers

 

[Duckbutter]

Are the control arms rusted out and the axle is moving?