OEM 2003 GMC Envoy Muffler

2003 GMC Envoy Parts Questions & Experts Answers

• Q: How to replace the muffler on 2003 GMC Envoy?

  A: Properly supporting the vehicle should be the first step in Muffler replacement. Begin by taking off the frame brace (extended versions need this part) and all nuts connecting the Muffler to the catalytic converter pipe. The entire exhaust Muffler assembly needs replacement when any part shows signs of damage. Before reusing the Muffler or front pipe examine them for damage and remove the Muffler from its hanger insulators. When Exhaust Pipe damage occurs beyond the Muffler, the exhaust system needs support before cutting and removing the damaged exhaust section with resonator. The procedure begins with Muffler placement onto the vehicle before the exhaust hanger nuts must be tightened to the insulators. Mount the Muffler to the catalytic converter pipe before tightening Muffler nuts to 45 nm (33 ft. Lbs.). During Muffler section replacement connect your exhaust to its proper insulators then mount the Exhaust Pipe onto the Muffler before tightening clamp nuts up to 50 nm (37 ft. Lbs.). First lower your vehicle then inspect the exhaust system for leaks while checking for underbody contact. Reinstall the frame brace when necessary on extended vehicle models.