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 1188 (ENGINE EXHAUST SYSTEM)SPECIFICATIONS
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 1188 (Engine Exhaust System): Specifications
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Specifications
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Fastener Tightening Specifications
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Exhaust Manifold Bolt (First Pass) | 15 N.m | 11 lb ft |
| Final Pass | 25 N.m | 18 lb ft |
| Exhaust Manifold Heat Shield Bolt | 9 N.m | 80 lb in |
| Exhaust Manifold Nut | 20 N.m | 15 lb ft |
| Exhaust Muffler Bolt | 50 N.m | 37 lb ft |
| Exhaust Muffler Hanger Nut | 16 N.m | 12 lb ft |
| Exhaust Pipe Brace Lower Bolt | 50 N.m | 37 lb ft |
| Exhaust Pipe Hanger Bolt | 50 N.m | 37 lb ft |
| Ignition Coil Bracket Stud | 12 N.m | 106 lb in |
| Oxygen Sensor | 42 N.m | 30 lb ft |
| Rear Stabilizer Shaft Bracket Bolt | 65 N.m | 49 lb ft |
| Rear Stabilizer Shaft Bracket Nut | 95 N.m | 70 lb ft |
| Secondary Air Injection (AIR) Pipe Bolt | 20 N.m | 15 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.