2002 GMC C3500 HD 8.1 G, AutomaticFACTORY OEM SERVICE PROCEDURE

Fastener Tightening Specifications

Fastener Tightening Specifications

Application Specifications
Metric English
Accelerator Control Assembly to Floor Fasteners 20 N.m 15 lb ft
AIR Check Valves 23 N.m 17 lb ft
AIR Pipe To Exhaust Manifold Bolts 25 N.m 18 lb ft
AIR Pump Bracket Assembly Hold Down Bolt 25 N.m 18 lb ft
AIR Pump Solenoid to Base 4 N.m 35 lb in
Camshaft Position (CMP) Sensor Bolt 12 N.m 106 lb in
Crankshaft Position (CKP) Sensor Bolt 12 N.m 106 lb in
Engine Coolant Temperature (ECT) Sensor 20 N.m 15 lb ft
Engine Sight Shield Bolts 10 N.m 89 lb in
Engine Sight Shield Bracket Bolts 10 N.m 89 lb in
Evaporative Emission (EVAP) Purge Solenoid Shoulder Bolt 10 N.m 89 lb in
Exhaust Gas Recirculation (EGR) Valve Bracket Nuts 22 N.m 16 lb ft
Exhaust Gas Recirculation (EGR) Valve Nuts 22 N.m 16 lb ft
Exhaust Gas Recirculation (EGR) Valve Pipe Bolts and Nuts 30 N.m 22 lb ft
Fuel Balance Pump Fittings 30 N.m 22 lb ft
Fuel Fill Hose Clamp 2.5 N.m 22 lb in
Fuel Fill Pipe Ground Strap Screw 9 N.m 80 lb in
Fuel Fill Pipe Housing to Fill Pipe Bolts 2.3 N.m 20 lb in
Fuel Fill Vent Hose Clamp 2.5 N.m 22 lb in
Fuel Filter Fitting 27 N.m 20 lb ft
Fuel Rail Attaching Bolts 12 N.m 106 lb in
Fuel Tank Shield Bolts-Rear 75 N.m 55 lb ft
Fuel Tank Strap Bolts-Front or Rear 35 N.m 26 lb ft
Heated Oxygen Sensor (HO2S) 41 N.m 30 lb ft
Ignition Coil Attaching Bolts 12 N.m 106 lb in
Intake Manifold Sight Shield 10 N.m 89 lb in
Knock Sensor (KS) 20 N.m 15 lb ft
Manifold Absolute Pressure (MAP) Sensor 12 N.m 106 lb in
Powertrain Control Module (PCM) Connector End Bolts 8 N.m 70 lb in
Throttle Body Attaching Bolts 10 N.m 89 lb in
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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.