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.
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedFACTORY OEM SERVICE PROCEDURE
Engine Exhaust System
- Specifications
- Diagnostic Information and Procedures
- Repair Instructions
- Exhaust Manifold Replacement - Left Side (4.3L)
- Exhaust Manifold Replacement - Left Side (4.8L, 5.3L, 6.0L)
- Exhaust Manifold Replacement - Left Side (6.6L)
- Exhaust Manifold Replacement - Right Side (4.3L)
- Exhaust Manifold Replacement - Right Side (4.8L, 5.3L, and 6.0L)
- Exhaust Manifold Replacement - Right Side (6.6L)
- Turbocharger Exhaust Pipe Replacement (6.6L (LMM))
- Exhaust Pipe Replacement - Left Side (6.6L (LMM))
- Exhaust Pipe Replacement - Right Side (6.6L (LMM))
- Catalytic Converter Replacement (4.3L)
- Catalytic Converter Replacement (4.8L and 5.3L )
- Catalytic Converter Replacement (6.0L - Right)
- Catalytic Converter Replacement (6.0L - Left)
- Catalytic Converter Replacement (6.6L (LMM))
- Exhaust Particulate Filter Cleaning (LMM DPF Service Regeneration)
- Exhaust Particulate Filter Cleaning (LMM DPF Regeneration Enable)
- Exhaust Particulate Filter Replacement (6.6L (LMM))
- Muffler Replacement (4.3L, 4.8L, 5.3L, and 6.0L)
- Tail Pipe Replacement (6.6L (LMM))
- Exhaust Heat Shield Replacement - Body Panel
- Exhaust Heat Shield Replacement - Frame
- Description and Operation
- Special Tools and Equipment
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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