OEM GMC Safari Muffler

GMC Safari Muffler Parts and Q&A

• Muffler
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  Q: What precautions should be taken when replacing a muffler on GMC Safari?

  A:

  Protective goggles and gloves should always be worn during Muffler replacement because they prevent injuries from landing rust and the sharp edges. Service the exhaust system when it has reached a safe temperature to prevent burns. Penetrating oil should be applied to bolt threads in case of resistance. Climb the vehicle before you begin to support the Muffler assembly. You must detach the 3 nuts between the Muffler assembly and Catalytic Converter assembly. The Muffler assembly becomes easier to remove after applying rubber lubricant gm p/n 12345884 to the rubber hangers and separating the assembly from its hanger brackets at the front, rear, and tailpipe location. Inspect the exhaust system for correct alignment before tightening sequence starts with all bolts or nuts installed loosely until alignment is achieved then follow with rear-to-front tightening. Exhaust system alignment remains optimal only when you replace all worn-down hangers, brackets, and clamps. When installing new exhaust system components use oem replacement parts and replace the tailpipe with each new Muffler installation and begin every connection with new nuts while using a wire brush to clean the manifold stud threads beforehand. If you use rubber lubricant gm p/n 12345884 you must reapply it before mounting the Muffler assembly into the car and attaching it to the tailpipe hanger, rear hanger, and front hanger. Secure the Muffler assembly to the Catalytic Converter assembly by using the 3 nuts which require 40 nm (30 ft. Lbs.) torque.
• Muffler W/Tpipe
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  Q: What precautions should be taken when removing and installing the muffler assembly on GMC Safari?

  A:

  Protect your skin and eyes with goggles and gloves when uninstalling the Muffler assembly because there are rusted surfaces and sharp points along with heat dangers from the exhaust system. Bolt threads will become easier to remove by using penetrating oil on the affected area. Start by lifting your vehicle while maintaining support for the Muffler assembly. Use rubber lubricant gm p/n 12345884 to treat the rubber hangers before you access the components by detaching the three Muffler assembly nuts from the Catalytic Converter assembly. Detach the Muffler assembly from its hangers at the front, the rear, and the tailpipe section before pulling it out from the vehicle. Installation requires exhaust system alignment inspection and maintenance of loose bolts or nuts until alignment becomes apparent before tightening them from the front end to the rear section. All damaged exhaust system hangers, hanger brackets and clamps should be replaced in order to maintain the correct alignment. When installing new exhaust system components it is essential to use oem-certified parts while also ensuring you replace the tailpipe during Muffler replacement and using fresh nuts to join the Exhaust Pipe to the Exhaust Manifold after a thorough cleaning of the manifold stud threads with a wire brush. Before installing the Muffler assembly into the vehicle multiple applications of rubber lubricant (GM P/N 12345884) should be applied to the rubber hangers. Attach the Muffler assembly to the tailpipe hanger along with the rear hanger and front hanger before securing the three nuts to join it to the Catalytic Converter assembly while tightening them to 40 nm (30 ft. Lbs.).