Im getting a frame from a 05 sierra 4x4 rcsb for 300 bucks, practically mint shape, some very light damage on the front drives side corner. I plan on stripping it to bare metal, powder coat, all new bushings and steering components in the front end, everything is getting painted or powder coated, going to 4 link the rear end, box the whole frame, c-notch, then swap it under the silverado. So is there any differences between the 99-02 and 03-07 frame? some parts have different mounting points? anything? both are 4wd rcsb frames

 

AFAIK they are the same.

 

I'm pretty sure the exhaust hanger mounting points are different. When I installed my Magnaflow kit meant for a 2003+ SS on my 2001 ECSB I had to "adjust the hangers" and relocate the metal rods on the exhaust piping.

 

meh exahust hangers are no big deal. so the steering components mount the same?