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 1000 (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 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fastener Tightening Specifications
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Air Cleaner Outlet Duct Clamp (4.8L, 5.3L, and 6.0L) | 7 N.m | 62 lb in |
| Air Cleaner Outlet Duct Clamp (6.6L) | 6 N.m | 53 lb in |
| Air Conditioning (A/C) Compressor Bolt (6.6L) | 50 N.m | 37 lb ft |
| Air Inlet Tube Nut (6.6L) | 25 N.m | 18 lb ft |
| Auxiliary Water Pump Bracket Nut | 9 N.m | 80 lb in |
| Bypass Pipe to Water Pump Bolt (6.6L) | 21 N.m | 16 lb ft |
| Charged Air Cooler Duct Clamp (6.6L) | 6 N.m | 53 lb in |
| Coolant Air Bleed Pipe Cover Bolt (4.8L, 5.3L, and 6.0L) | 12 N.m | 106 lb in |
| Coolant Air Bleed Pipe Stud/Bolt (4.8L, 5.3L, and 6.0L) | 12 N.m | 106 lb in |
| Coolant Heater (4.8L, 5.3L, and 6.0L) | 50 N.m | 37 lb ft |
| Coolant Heater (8.1L) | 60 N.m | 47 lb ft |
| Coolant Heater Bolt (4.3L) | 2 N.m | 18 lb in |
| Coolant Heater Bolt (6.6L) | 2 N.m | 18 lb in |
| Coolant Heater Cord Bolt | 8 N.m | 71 lb in |
| Coolant Outlet Pipe Clip Bolt (6.6L) | 9 N.m | 80 lb in |
| Engine Block Coolant Drain Plug | 60 N.m | 44 lb ft |
| Engine Shield Bolt | 20 N.m | 15 lb ft |
| Exhaust Gas Recirculation (EGR) Coolant Pipe Bolt (6.6L) | 21 N.m | 16 lb ft |
| Exhaust Manifold Pipe Nut (4.8L, 5.3L, and 6.0L) | 50 N.m | 37 lb ft |
| Fan Clutch Bolt | 23 N.m | 17 lb ft |
| Fan Clutch Nut | 56 N.m | 41 lb ft |
| Fan Pulley Bolt/Nut (6.6L) | 46 N.m | 34 lb ft |
| Fan Shroud Bolt | 9 N.m | 80 lb in |
| Fuel Line Bracket Bolt (6.6L) | 21 N.m | 15 lb ft |
| Fuel Line to Fuel Injection Control Module Bolt (6.6L) | 35 N.m | 26 lb ft |
| Generator Bracket Bolt (6.6L and 8.1L) | 50 N.m | 37 lb ft |
| Generator Bracket Stud (8.1L) | 20 N.m | 15 lb ft |
| Generator Positive Cable Nut (6.6L) | 9 N.m | 80 lb in |
| Heater Inlet Pipe to Fuel Filter Bolt (6.6L) | 21 N.m | 16 lb ft |
| Heater Inlet Pipe to Thermostat Bolt (6.6L) | 21 N.m | 16 lb ft |
| Heater Outlet Hose Bracket Bolt (6.6L) | 21 N.m | 16 lb ft |
| Hood Hinge Bolts | 25 N.m | 18 lb ft |
| Idler Pulley Bolt (6.6L) | 43 N.m | 32 lb ft |
| Intake Manifold Cover Clamp (6.6L) | 6 N.m | 53 lb in |
| Junction Block Bracket Bolt (6.6L) | 9 N.m | 80 lb in |
| Main Electrical Harness Bracket Bolt (6.6L) | 21 N.m | 15 lb ft |
| Main Engine Electrical Harness Connector Bolt (6.6L) | 10 N.m | 89 lb in |
| Oil Cooler Hose Adapter Bolt (6.0L) | 12 N.m | 106 lb in |
| Oil Cooler Hose Bracket Bolt (6.0L) | 25 N.m | 18 lb ft |
| Oil Cooler Hose Bracket Bolt (8.1L) | 50 N.m | 37 lb ft |
| Positive Crankcase Ventilation (PCV) Oil Separator Bracket Nut (6.6L) | 21 N.m | 16 lb ft |
| Power Steering Pump Bracket Bolt (6.6L) | 46 N.m | 34 lb ft |
| Radiator Bolt | 25 N.m | 18 lb ft |
| Starter/Generator Control Module (SGCM) Brace Bolts | 25 N.m | 18 lb ft |
| Starter/Generator Control Module (SGCM) Coolant Pump Bolts | 9 N.m | 80 lb in |
| Starter/Generator Control Module (SGCM) Coolant Tank Bolts | 20 N.m | 15 lb ft |
| Starter/Generator Control Module (SGCM) Coolant Tank Nuts | 9 N.m | 80 lb in |
| Starter/Generator Control Module (SGCM) Cooling Fan Bolt | 9 N.m | 80 lb in |
| Starter/Generator Control Module (SGCM) Radiator Bolt | 9 N.m | 80 lb in |
| Starter/Generator Stator Coolant Inlet Pipe Bolt | 9 N.m | 80 lb in |
| Surge Tank Bolt/Nut | 9 N.m | 80 lb in |
| Thermal Bypass Fitting | 35 N.m | 26 lb ft |
| Thermal Bypass Hose Bolt | 10 N.m | 89 lb in |
| Thermostat Housing Bolt (4.8L, 5.3L, and 6.0L) | 15 N.m | 11 lb ft |
| Thermostat Housing Cover Bolt (6.6L) | 21 N.m | 16 lb ft |
| Thermostat Housing Crossover Bolt/Nut (6.6L) | 21 N.m | 16 lb ft |
| Transmission Control Module (TCM) Cover Bolt | 9 N.m | 80 lb in |
| Transmission Control Module (TCM) Electrical Connector Bolt | 8 N.m | 71 lb in |
| Turbocharger Coolant Bypass Valve (6.6L) | 60 N.m | 44 lb ft |
| Turbocharger Coolant Feed Pipe Bracket Bolt (6.6L) | 21 N.m | 16 lb ft |
| Turbocharger Coolant Feed Pipe Nut (6.6L) | 9 N.m | 80 lb in |
| Turbocharger Coolant Inlet Banjo Bolt (6.6L) | 25 N.m | 18 lb ft |
| Turbocharger Coolant Outlet Pipe Bolt/Nut (6.6L) | 9 N.m | 80 lb in |
| Water Crossover Bolt (8.1L) | 50 N.m | 37 lb ft |
| Water Outlet Bolt (8.1L) | 30 N.m | 22 lb ft |
| Water Outlet Stud (4.3L) | 25 N.m | 18 lb ft |
| Water Outlet Tube Bolt (6.6L) | 21 N.m | 16 lb ft |
| Water Pump Bolt (4.3L) | 45 N.m | 33 lb ft |
| Water Pump Bolt (4.8L, 5.3L, and 6.0L) | ||
|
15 N.m | 11 lb ft |
|
30 N.m | 22 lb ft |
| Water Pump Bolt (6.6L) | 21 N.m | 16 lb ft |
| Water Pump Bolt (8.1L) | 50 N.m | 37 lb ft |
| Water Pump Inlet Pipe Bolt (6.6L) | 21 N.m | 16 lb ft |
| Water Pump Pulley Bolt (4.3L) | 25 N.m | 18 lb ft |
| Water Pump to Oil Cooler Inlet Pipe Nut (6.6L) | 21 N.m | 16 lb ft |
| Wiring Harness Bracket to Thermostat Housing Bolt (6.6L) | 8 N.m | 71 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.