Mine was easy. I didnt have any problems. You should hit up MBRP for a new one. Sounds like the one you have has some issues.
07 Silver 3.0 CRD, Clifford matrix 50.5x remort start/turbo timer, 265/70R17 Goodyear DURATRACS, XD Series Spy wheels, OME Lift Kit, Kenwood navigation system with reverse camera, Inmotion tuned, Amsoil air filter, Fitch fuel catalyst, Air Lift suspension air bags with air compressor, P3 brake controller, MBRP Exhaust, Accu Pro Calibrator, Addco front/rear anti sway bar, Husky Liner floor mats, upgraded air intake tube, Quick Oil Drain Valve.