[muddog321]

AS stated the Bravada had transfer cae clutch pack binding so a GM bulletin on replacing the fluid with blue, driving 100 miles, chaging again and hope that fixes it. As for the exhaust noise 99-01 had the secondary air injection so lookk in the "How To" section on that whole mess - both my 99 and 01 had many problems/rust outs/burn thrus on those quality parts!