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 140 (ENGINE CONTROLS - REMOVAL, OVERHAUL & INSTALLATION - GASOLINE)TORQUE SPECIFICATIONS8.1L
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Torque Specifications: 8.1L
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION 8.1L
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
TORQUE SPECIFICATIONS (8.1L)
| Component | Ft. Lbs. (N.m) |
|---|---|
| AIR Pipe-To-Exhaust Manifold Bolt | 18 (25) |
| EGR Pipe-To-EGR Valve Bolt | 22 (30) |
| EGR Valve Bolt | 18 (25) |
| EGR Valve Pipe-To-Cylinder Head Bolt | 37 (50) |
| EGR Valve Pipe-To-Exhaust Manifold Nut | 22 (30) |
| Engine Coolant Temperature (ECT) Sensor | 15 (20) |
| Exhaust Gas Recirculation (EGR) Valve Nut | 22 (30) |
| Fuel Filter Fitting | 22 (30) |
| Fuel Pipe Retaining Clip Nut | 21 (28) |
| Fuel Tank Strap Bolt | 15 (20) |
| Heated Oxygen Sensor (HO2S) | 30 (41) |
| Knock Sensor (KS) | 14 (19) |
| Secondary Air Injection (AIR) Crossover Pipe Bracket Fastener | 37 (50) |
| INCH Lbs. (N.m) | |
| Accelerator Pedal Mounting Bolt | 44 (5) |
| Air Cleaner Assembly Bolt | 159 (18) |
| Camshaft Position (CMP) Sensor Bolt | 89 (10) |
| Crankshaft Position (CKP) Sensor Bolt | 106 (12) |
| Engine Sight Shield Bolt | 89 (10) |
| Engine Sight Shield Bracket Bolt | 89 (10) |
| Evaporative (EVAP) Emission Canister Bracket Mounting Bolt | 106 (12) |
| Evaporative (EVAP) Emission Purge Solenoid Shoulder Bolt | 93 (10.5) |
| Evaporative (EVAP) Emission Purge Valve Retaining Bolt | 89 (10) |
| Fuel Fill Hose Clamp | 24 (2.8) |
| Fuel Fill Pipe Ground Strap Bolt | 80 (9) |
| Fuel Fill Pipe Housing-To-Fill Pipe Bolt | 20 (2.3) |
| Fuel Injection Sight Shield Retaining Bolt | 89 (10) |
| Fuel Pipe Retaining Clip Bolt | 106 (12) |
| Fuel Rail Attaching Bolt | 106 (12) |
| Ignition Coil Attaching Bolt | 106 (12) |
| Manifold Absolute Pressure (MAP) Sensor Retaining Bolt | 106 (12) |
| Mass Air Flow (MAF) Sensor Clamp | 35 (4) |
| Powertrain Control Module (PCM) Connector End Bolt | 71 (8) |
| Secondary Air Injection (AIR) Manifold Pipe Fastener | 106 (12) |
| Secondary Air Injection (AIR) Pump and Bracket Assembly Fastener | 89 (10) |
| Throttle Actuator Control (TAC) Retaining Fastener | 27 (3) |
| Throttle Body Attaching Bolt | 89 (10) |
| Upper Engine Wire Harness Bracket Nut | 89 (10) |
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.