Exhaust Hangers

This procedure covers the replacement of worn or damaged exhaust rubber hangers on the 2014-2018 Chevrolet Silverado 1500 with the 5.3L V8 L83 engine to eliminate exhaust noise, vibration, and prevent exhaust component damage.

Warnings

Tools required

Parts

• Exhaust hanger rubber insulators × 4 — GM OEM or equivalent rubber hangers - typically 2-4 needed depending on condition

Preparation

1. Park vehicle on level surface and apply parking brake
2. Place wheel chocks behind rear wheels
3. Ensure exhaust system is completely cool to the touch
4. Raise vehicle to comfortable working height using floor jack and support with jack stands under frame rails
5. Visually inspect entire exhaust system from underneath to identify all damaged or worn hangers

Procedure

1. 1

   Locate and inspect exhaust hangers
   The Silverado 1500 typically has 4-5 exhaust hangers running from the catalytic converters to the tailpipe. Locate each hanger bracket mounted to the vehicle frame and the corresponding hook on the exhaust pipe. Inspect each rubber insulator for cracks, tears, or excessive wear. Common failure points are at the muffler and tailpipe hangers.
2. 2

   Apply penetrating lubricant
   Spray penetrating lubricant on the exhaust hanger hooks and inside the rubber insulators. Allow to soak for 5-10 minutes. This will ease removal of the rubber hangers from the metal hooks and brackets.
3. 3

   Support exhaust system
   Position a floor jack with a block of wood under the exhaust component near the hanger being replaced. Apply just enough upward pressure to take weight off the hanger but do not lift the exhaust. This prevents the exhaust from dropping suddenly when the hanger is removed.
4. 4

   Remove damaged rubber hanger
   Using a flathead screwdriver or pry bar, carefully pry the rubber hanger off the hook attached to the exhaust pipe. Work the rubber insulator off the frame bracket hook second. If the rubber is severely deteriorated, it may tear during removal. For stubborn hangers, use pliers to grip and pull the rubber while prying with the screwdriver.
5. 5

   Clean hanger mounting points
   Clean both the frame bracket hook and exhaust pipe hook with a wire brush or rag to remove rust, debris, and old rubber residue. This ensures the new hanger seats properly and lasts longer.
6. 6

   Install new rubber hanger
   Apply a small amount of penetrating lubricant or dish soap to the inside of the new rubber hanger to act as installation lubricant. Position the new hanger on the frame bracket hook first, then use the floor jack to carefully raise or lower the exhaust until the exhaust hook aligns with the second hole in the rubber hanger. Use a pry bar or rubber mallet to work the rubber over the exhaust hook. Verify the hanger is fully seated on both hooks.
7. 7

   Check exhaust alignment
   With the new hanger installed, lower the floor jack slowly and verify the exhaust hangs naturally without binding. Check clearance between exhaust pipes and the vehicle underbody, frame, fuel lines, and rear axle. There should be at least 1 inch of clearance on all sides. If alignment is off, the exhaust may need to be rotated slightly on the hangers.
8. 8

   Repeat for remaining hangers
   Move the floor jack support to the next hanger location and repeat steps 3-7 for each additional damaged hanger. Work from front to rear of the vehicle for best results. Install all worn hangers even if they haven't completely failed to prevent future issues.
9. 9

   Inspect heat shields and brackets
   While underneath the vehicle, inspect all exhaust heat shields for damage or loose mounting bolts. Check that no hanger brackets are cracked or bent. Tighten any loose heat shield bolts to specification.
   Torque spec

   Heat Shield Bolts10 Nm (7 lb-ft)
10. 10

    Final exhaust system inspection
    Visually inspect the entire exhaust system one final time. Verify all hangers are properly seated, exhaust pipes have adequate clearance from vehicle components, and no tools or parts were left underneath the vehicle. Gently push up and down on the tailpipe to verify hangers are secure and exhaust moves freely without binding.

Reassembly

1. Remove jack stands and carefully lower vehicle to the ground
2. Remove wheel chocks

Verification

• Start the engine and listen for any new exhaust leaks or rattles
• Rev engine to 2000 RPM and verify exhaust system does not contact vehicle frame or components
• Take vehicle for short test drive and listen for exhaust vibration or knocking noises
• Visually inspect hangers after test drive to confirm they remain properly seated

Related trouble codes on this vehicle

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