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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 598 (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 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
Fastener Tightening Specifications
| Application | Specifications | |
|---|---|---|
| Metric | English | |
| Coolant Recovery Reservoir Mounting Nut | 3.3 N.m | 29 lb in |
| Cooling Fan Shroud Bolt | 10 N.m | 89 lb in |
| Coolant Heater Bolt | 2 N.m | 18 lb in |
| Engine Block Coolant Drain Plug | 19 Mm | 14 lb ft |
| Engine Block Heater Screw | 2 N.m | 18 lb in |
| Knock Sensor (3.8L) | 19 N.m | 14 lb ft |
| Radiator Bracket Mounting Bolt | 10 N.m | 18 lb in |
| Radiator Lower Air Deflector | 20 N.m | 15 lb ft |
| Thermostat Bypass Pipe Bolt | 11 N.m | 98 lb in |
| Thermostat Bypass Pipe Nut | 25 N.m | 18 lb ft |
| Water Outlet Housing Bolt (3.1 L) | 25 N.m | 18 lb ft |
| Water Outlet Housing Bolt/Stud (3.8L) | 27 N.m | 20 lb ft |
| Water Pump Bolt (3.1 L) | 10 N.m | 89 lb in |
| Water Pump Bolt (Long) (3.8 L) | 34 N.m | 25 lb ft |
| Water Pump Bolt (Short) (3.8 L) | 22 N.m | 16 lb ft |
| Water Pump Pulley Bolt (3.1 L) | 25 N.m | 18 lb ft |
| Water Pump Pulley Bolt (3.8L) | 13 N.m | 115 lb in |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.