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.
2006 Hummer H3 AutomaticFACTORY OEM SERVICE PROCEDURE
Specifications Index
H3 SPECIFICATIONS INDEX
| System | Specification/Procedure | ||
|---|---|---|---|
| Air Conditioning | |||
| Service | REFRIGERANT SYSTEM CAPACITIES | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Battery | BATTERY USAGE | ||
| Brakes | |||
| Bleeding Sequence | HYDRAULIC BRAKE SYSTEM BLEEDING (MANUAL) | ||
| Disc Brakes | DISC BRAKE COMPONENT SPECIFICATIONS | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Charging | |||
| Generator | GENERATOR USAGE | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Drive Belts | |||
| Adjustment | Serpentine Belt - No Adjustment Available | ||
| Belt Routing | See illustration under DRIVE BELT REPLACEMENT (WITHOUT A/C) or DRIVE BELT REPLACEMENT (WITH A/C) . | ||
| Engine Cooling | |||
| General Service Specifications | NA | ||
| Radiator Cap Pressure | Pressure is Stamped On Pressure Cap | ||
| Thermostat R & I | |||
| 3.5L | THERMOSTAT REPLACEMENT | ||
| Water Pump R & I | |||
| 3.5L | WATER PUMP REPLACEMENT | ||
| Engine Mechanical | |||
| 3.5L | |||
| Compression | Normal reading should be approximately 215 psi (1482 kPa). The lowest reading should not be less than 70 percent of the highest reading |
||
| Oil Pressure | 12 psi at 1200 RPM | ||
| Overhaul | ENGINE MECHANICAL SPECIFICATIONS | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Fluid Specifications | See FLUIDS under MAINTENANCE tab. From within Manager or Service Writer, click the "30/60/90 Interval" or "Maint." button. | ||
| Flywheel/Flex Plate/Drive PlateTorque | First Pass 30 Ft. Lbs. (40 N.m) Final Pass + an additional 45 degrees |
||
| Fuel System | |||
| Pressure Specification | Energize using scan tool 50-57 psi (345-395 kPa). | ||
| Fuel Pressure Test Procedure | See FUEL PRESSURE GAGE INSTALLATION AND REMOVAL and FUEL SYSTEM DIAGNOSIS | ||
| Fuel Filter Location | Fuel filter is contained in fuel sender (module) assembly inside fuel tank | ||
| Fuel Filter R & I | FUEL TANK MODULE REPLACEMENT | ||
| Ignition | |||
| Firing Order & Cylinder Identification | |||
| 3.5L | FIRING ORDER & CYLINDER IDENTIFICATION | ||
| Ignition Wires (Resistance) | NA Coil on Plug | ||
| Ignition Wires (Routing) | |||
| 3.5L | NA Coil on Plug | ||
| Spark Plug | |||
| 3.5L (Type GM P/N 12569190) | |||
| Gap | 0.042 in (1.08 mm) | ||
| Torque | 13 lb ft (18 N.m) | ||
| Starting | |||
| Starter | NA | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Wheel Alignment | |||
| Adjustment Specifications | WHEEL ALIGNMENT SPECIFICATIONS | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Wheel & Tire | |||
| Wheel Lug Nut Torque | 103 Ft. Lbs. (140 N.m) | ||
Factory Service Tools
Use the Manual With the Right Hardware
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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.