OEM GMC Sierra 3500 Classic Exhaust Hanger

GMC Sierra 3500 Classic Exhaust Hanger Parts Questions & Experts Answers

• Muffler Insulator
  15092802
  Q: How to replace the Exhaust Hanger Mounting Bracket for 6.0L and 6.6L engines on GMC Sierra 3500 Classic?

  A:

  The first step for Exhaust Hanger mounting bracket replacement on 6.0l and 6.6l engines involves removing the exhaust manifold pipe when using the 6.0l engine and the subsequent removal of the left Catalytic Converter for that engine type. It is necessary to disassemble the Catalytic Converter when working on a 6.6l engine. When working with a vehicle equipped with the 4l80-e automatic transmission (MT1), remove the Exhaust Pipe hanger bracket bolts and bracket; an allison(R) automatic transmission (MW7) requires removing the bolt/stud and bracket while a vehicle with the 6l90-e automatic transmission (MYD) requires removal of associated bolts and bracket. When working with a vehicle featuring the 6l90-e automatic transmission (MYD) install the Exhaust Pipe hanger bracket along with its bolts tightening both to 25 n.m (18 lb ft). The installation of the Exhaust Pipe hanger bracket requires a bolt/stud on an allison(R) automatic transmission (MW7) to be tightened to 25 n.m (18 lb ft). When installing the Exhaust Pipe hanger bracket on a 4l80-e automatic transmission vehicle (MT1) users should securely tighten its bolts to 25 n.m (18 lb ft). Install the Catalytic Converter when the vehicle has a 6.6l engine and perform the left Catalytic Converter installation before the exhaust manifold pipe for the 6.0l engine.