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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2136 (ENGINE EXHAUST SYSTEM)SPECIFICATIONSFASTENER TIGHTENING SPECIFICATIONS
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Fastener Tightening Specifications
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Fastener Tightening Specifications
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Catalytic Converter to Exhaust Manifold Nut (4.3L, 4.8L, 5.3L, 6.0L, 6.2L) | 50 N.m | 37 lb ft |
| Catalytic Converter to Muffler Nut (4.3L, 4.8L, 5.3L, 6.0L, 6.2L) | 45 N.m | 33 lb ft |
| Catalytic Converter to Muffler Nut (L96 with ZW9) | 47 N.m | 35 lb ft |
| Catalytic Converter to Particulate Filter Nut (6.6L) | 45 N.m | 33 lb ft |
| Exhaust Heat Shield Nut | 9 N.m | 80 lb in |
| Exhaust Manifold Bolts (4.8L, 5.3L, 6.0L, 6.2L) | ||
|
15 N.m | 11 lb ft |
|
20 N.m | 18 lb ft |
| Exhaust Manifold Bolt (6.6L) | 50 N.m | 37 lb ft |
| Exhaust Manifold Nut (6.6L) | 57 N.m | 42 lb ft |
| Exhaust Manifold Bolt/Stud (4.3L) | 30 N.m | 22 lb ft |
| Exhaust Manifold Heat Shield Bolt (4.3L, 4.8L, 5.3L, 6.0L, 6.2L) | 9 N.m | 80 lb in |
| Exhaust Manifold Heat Shield Bolt (6.6L) | 10 N.m | 89 lb in |
| Exhaust Manifold Outlet Pipe-Left to Exhaust Manifold Bolts (LGH/LML) | 53 N.m | 39 lb ft |
| Exhaust Manifold Outlet Pipe-Right to Exhaust Manifold Bolts (LGH/LML) | 53 N.m | 39 lb ft |
| Exhaust Manifold Outlet Pipe-Right to Turbocharger Nuts (LGH) | 25 N.m | 18 lb ft |
| Exhaust Manifold Outlet Pipe-Right to EGR Cooler Assembly Nuts (LML) | 25 N.m | 18 lb ft |
| Exhaust Manifold Pipe to Exhaust Manifold Nut (6.0L) | 50 N.m | 37 lb ft |
| Exhaust Muffler to Exhaust Manifold Pipe Nut (6.0L) | 45 N.m | 33 lb ft |
| Exhaust Muffler to Exhaust Particulate Filter Nut (6.6L) | 45 N.m | 33 lb ft |
| Exhaust Pipe to Muffler Nut (L96 with ZW9) | 47 N.m | 35 lb ft |
| Exhaust Pipe Hanger Bracket Nut (6.0L, 6.6L) | 22 N.m | 16 lb ft |
| Exhaust Pipe Hanger Bracket Bolt to Transmission (MW7) | 22 N.m | 16 lb ft |
| Exhaust Pipe Hanger Bracket Bolt to Transmission (MQ7) | 25 N.m | 18 lb ft |
| Exhaust Pipe Hanger Bracket Stud (6.0L, 6.6L) | 22 N.m | 16 lb ft |
| Exhaust Pipe Hanger Rod to Frame Bolt (LZ1) | 22 N.m | 16 lb ft |
| Exhaust Pipe Heat Shield Bolt (6.6L) | 10 N.m | 89 lb in |
| Muffler to Catalytic Converter Nut (Two Bolt Flange) | 45 N.m | 33 lb ft |
| Muffler to Catalytic Converter Nut (Norma Clamp) | 28 N.m | 21 lb ft |
| Turbocharger Exhaust Pipe Bracket Bolt to Engine Block (6.6L) | 34 N.m | 25 lb ft |
| Turbocharger Exhaust Pipe Heat Shield Bolt (6.6L) | 10 N.m | 89 lb in |
| Turbocharger Exhaust Pipe to Turbocharger Clamp Nut (6.6L) | 10 N.m | 89 lb in |
| Turbocharger Upper Heat Shield Bolt (6.6L) | 10 N.m | 89 lb in |
RENDER: 1.0x
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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.