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 1896 (ENGINE COOLING 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 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Coolant Heater Bolt - LAT/LE5 | 10 N.m | 89 lb in |
| Coolant Heater Bolt | 60 N.m | 44 lb ft |
| Cooling Fan to Fan Motor Nut | 8 N.m | 71 lb in |
| Cooling Fan Motor to Shroun Bolts | 8 N.m | 71 lb in |
| Condenser Radiator Fan Module (CRFM) Bracket Bolt | 22 N.m | 16 lb ft |
| Crossover Pipe Bolts - LZ4 | 22 N.m | 16 lb ft |
| Engine Coolant Temperature (ECT) Sensor - LAT/LE5 | 20 N.m | 15 lb ft |
| Engine Coolant Temperature (ECT) Sensor - LZ4 | 18 N.m | 13 lb ft |
| Exhaust Heat Shield Bolts - LAT | 22 N.m | 16 lb ft |
| Fan Assembly to Radiator Bolt | 8 N.m | 71 lb in |
| Fan Assembly Screw | 8 N.m | 71 lb in |
| Negative Battery Terminal Bolt | 17 N.m | 13 lb ft |
| Surge Tank Bolt | 8 N.m | 71 lb in |
| Thermostat Housing Bolt - LAT/LZ4 | 10 N.m | 89 lb in |
| Thermostat Housing Bolt - LY7 | 10 N.m | 89 lb in |
| Thermostat Housing Cover Bolt - LAT | 10 N.m | 89 lb in |
| Transaxle Oil Cooler Line Fitting | 16 N.m | 12 lb ft |
| Water Pump Access Cover Bolt - LAT/LE5 | 10 N.m | 89 lb in |
| Water Pump Bolt - LAT/LE5 | 25 N.m | 18 lb ft |
| Water Pump and Pulley Bolts - LZ4 | 25 N.m | 18 lb ft |
| Water Pump and Pulley Bolts - LY7 | 10 N.m | 89 lb in |
| Water Pump Sprocket Bolt - LAT/LE5 | 10 N.m | 89 lb in |
| Wheel Nut | 125 N.m | 92 lb ft |
| Wiring Harness Ground Terminal Nut | 12 N.m | 106 lb in |
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.