Installation Procedure

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Inspect the anti-rotation tab of the lower brace bracket (2) to ensure that the tab is flush with the oil pan rib.

CAUTION:

Refer to Fastener Caution .

If the brace bracket has been removed or adjustment is required, position the bracket and Tighten the bolt (1) to 22 N.m (16 lb ft).
Courtesy of GENERAL MOTORS COMPANY

NOTE:
Install a NEW catalytic converter seal.

Catalytic Converter Seal (3) - Install
Warm Up Three-Way Catalytic Converter (2) - Install
Catalytic Converter Nut (1) - Hand Tighten [4x]
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NOTE:
Ensure the brace bracket is flush with the engine block boss.

Catalytic Converter Brace Bracket-Upper (2) - Install
Catalytic Converter Brace Bracket Bolt (1) - Hand Tighten [2x]
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NOTE:
Ensure the brace bracket is flush with the catalytic converter tab.

Catalytic Converter Brace Bracket-Lower (3) - Install
Catalytic Converter Brace Bracket Bolt (2) - Hand Tighten
Catalytic Converter Brace Bracket Bolt (1) - Hand Tighten
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NOTE:
Tighten the catalytic converter nuts in a cross pattern.

Catalytic Converter Nut (1) - Tighten [4x] 50 N.m (37 lb ft)
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Catalytic Converter Brace Bracket Bolt (1) - Tighten [2x] 22 N.m (16 lb ft)
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Catalytic Converter Brace Bracket Bolt (1) - Tighten 22 N.m (16 lb ft)
Catalytic Converter Brace Bracket Bolt (2) - Tighten 58 N.m (43 lb ft)
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Heated Oxygen Sensor Electrical Connector (1) - Connect [2x]
Exhaust Muffler - Install - Exhaust Muffler Replacement (LF4) , or Exhaust Muffler Replacement (LTG)
Turbocharger Heat Shield - Install - Turbocharger Heat Shield Replacement