OEM 2004 Chevrolet Trailblazer Muffler

2004 Chevrolet Trailblazer Parts Questions & Experts Answers

• Q: How to replace the muffler on 2004 Chevrolet Trailblazer?

  A: Raising the vehicle properly to work on the Muffler is a mandatory first step. Sequence replacement by disassembling the frame brace (found on extended versions) and the nuts which fasten the Muffler to the catalytic converter pipe. Any damage to the exhaust Muffler assembly requires complete replacement of this entire section. Check for damage on the exhaust Muffler and front pipe before removing the Muffler out of its hanger insulators. Inspect the exhaust system for aft Muffler damage then cut the pipe at the damaged spot while supporting it and remove the Exhaust Pipe together with the resonator. Position the new entire Muffler assembly properly on the vehicle then secure exhaust hangars to insulator brackets. The Muffler requires installation onto the catalytic converter pipe followed by nut tightening to 45 nm (33 ft. Lbs.). When replacing exhaust components behind the Muffler connect the exhaust pipes to insulators then install the Exhaust Pipe onto the Muffler before tightening clamp nuts to 50 nm (37 ft. Lbs.). Next check the exhaust system for leaks then reinstall the frame brace when necessary after you inspect the exhaust system for underbody contact. Finish by lowering the vehicle.