Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSPONTIAC2009G8 BASEREPAIR AND DIAGNOSISENGINE MECHANICALENGINE EXHAUST SYSTEMREPAIR INSTRUCTIONSEXHAUST SYSTEM REPLACEMENT (V6 - FOR ACCESS)INSTALLATION PROCEDURE

2009 Pontiac G8 Base

Installation Procedure

2009 Pontiac G8 BaseSECTION Installation Procedure

If removed, install the right catalytic converter. Refer to Catalytic Converter Replacement - Right Side (V8) or Catalytic Converter Replacement - Right Side (V6) .
If removed, install the left catalytic converter. Refer to Catalytic Converter Replacement - Left Side (V8) or Catalytic Converter Replacement - Left Side (V6) .
With the aid of an assistant or using a suitable jack; carefully raise the exhaust system up into the vehicle.

Fig 1: Identifying Center Insulator Hanger Bracket To Differential Retaining Bolts

Courtesy of GENERAL MOTORS CORP.

Align the exhaust system to the centre insulator hanger bracket to differential retaining stud (1).

CAUTION: Refer to Fastener Caution .

Install the centre insulator hanger bracket to differential retaining nut (1) and tighten to 45 N.m (33 lb ft).

Fig 2: Identifying Rear Insulator Hanger To Body Retaining Bolts

Courtesy of GENERAL MOTORS CORP.

Install the rear insulator hanger to body retaining bolts (1) and tighten to 26 N.m (19 lb ft).

Fig 3: Transmission Tunnel Cross-Brace To Body Retaining Bolts

Courtesy of GENERAL MOTORS CORP.

Install the transmission tunnel cross-brace (1).
Install the transmission tunnel cross-brace to body retaining bolts (2) and tighten to 12 N.m (9 lb ft).

Fig 4: Exhaust Crossover Pipe Assembly To Catalytic Converter Retaining Nuts

Courtesy of GENERAL MOTORS CORP.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.