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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1313 (ENGINE EXHAUST SYSTEM)SPECIFICATIONSFASTENER TIGHTENING SPECIFICATIONS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Fastener Tightening Specifications
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Fastener Tightening Specifications
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Fastener Tightening Specifications
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Catalytic Converter Bolt | 45 N.m | 33 lb ft |
| EGR Adapter Pipe to Exhaust Manifold Bolt 3.8L | 29 N.m | 21 lb ft |
| Engine Lift Bracket Bolt/Nut | 30 N.m | 22 lb ft |
| Exhaust Crossover Pipe Bolt/Nut 3.1L | 25 N.m | 18 lb ft |
| Exhaust Crossover Pipe Bolt/Stud 3.8L | 20 N.m | 15 lb ft |
| Exhaust Crossover Pipe Heat Shield Bolt 3.1 L | 10 N.m | 89 lb in |
| Exhaust Crossover Pipe Heat Shield Nut | 20 N.m | 15 lb ft |
| Exhaust Manifold Bolt/Nut 3.8L | 30 N.m | 22 lb ft |
| Exhaust Manifold Heat Shield Bolt 3.1 L | 10 N.m | 89 lb in |
| Exhaust Manifold Heat Shield Nuts 3.8L | 20 N.m | 15 lb ft |
| Exhaust Manifold Nut 3.1 L | 16 N.m | 12 lb ft |
| Exhaust Manifold Pipe Stud Nut | 35 N.m | 26 lb ft |
| Exhaust Pipe Rear Hanger Bolt | 25 N.m | 18 lb ft |
| Fuel Injector Sight Shield Bracket Nut | 30 N.m | 22 lb ft |
| Rear Bumper Impact Bar Bolt | 25 N.m | 18 lb ft |
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.