Specifications Index
ASCENDER, ENVOY, RAINIER & TRAILBLAZER SPECIFICATIONS INDEX
| System | Specification/Procedure | ||
|---|---|---|---|
| Air Conditioning | |||
| Service | REFRIGERANT SYSTEM CAPACITIES | ||
| Torque | Automatic System - FASTENER TIGHTENING SPECIFICATIONS Manual System - FASTENER TIGHTENING SPECIFICATIONS |
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| Axle Nut/Hub Nut | |||
| Front | 103 ft. lbs. (140 N.m) | ||
| 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 Drive Belts Are Self-Adjusting | ||
| Belt Routing | 4.2L See illustration under DRIVE BELT REPLACEMENT 5.3L See illustration under DRIVE BELT REPLACEMENT - ACCESSORY 6.0L See illustration under DRIVE BELT REPLACEMENT - ACCESSORY |
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| Engine Cooling | |||
| General Service Specifications | NA | ||
| Radiator Cap Pressure | Pressure rating is stamped on pressure cap | ||
| Thermostat R & I | |||
| 4.2L | THERMOSTAT REPLACEMENT (4.2L ENGINE) | ||
| 5.3L | THERMOSTAT REPLACEMENT (5.3L & 6.0L ENGINES) | ||
| Water Pump R & I | |||
| 4.2L | WATER PUMP REPLACEMENT (LL8) | ||
| 5.3L & 6.0L | WATER PUMP REPLACEMENT (LH6 AND LS2) | ||
| Auxiliary Water Pump | WATER PUMP REPLACEMENT - AUXILIARY | ||
| Engine Mechanical | |||
| 4.2L | |||
| Compression | Normal reading should be approximately 1482 kPa (215 psi) Lowest reading should not be less than 70 percent of the highest reading See ENGINE COMPRESSION TEST |
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| Oil Pressure | Oil Pressure - Minimum 12 psi (85 kPa) @ 1200 RPM | ||
| Overhaul | ENGINE MECHANICAL SPECIFICATIONS | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| 5.3L | |||
| Compression | No cylinder should read less than 690 kPa (100 psi) No cylinder should not be less than 70 percent of the highest cylinder See ENGINE COMPRESSION TEST |
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| Oil pressure | Oil Pressure - Minimum - Hot 6 psig (41 kPa) at 1,000 engine RPM 18 psig (124 kPa) at 2,000 engine RPM 24 psig (165 kPa) at 4,000 engine RPM |
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| Overhaul | ENGINE MECHANICAL SPECIFICATIONS | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| 6.0L | |||
| Compression | No cylinder should read less than 690 kPa (100 psi) No cylinder should not be less than 70 percent of the highest cylinder See ENGINE COMPRESSION TEST |
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| Oil pressure | Oil Pressure - Minimum - Hot 6 psig (41 kPa) at 1,000 engine RPM 18 psig (124 kPa) at 2,000 engine RPM 24 psig (165 kPa) at 4,000 engine RPM |
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| 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 | |||
| 4.2L | 18 ft. lbs. (25 N.m) + and additional 50 degrees | ||
| 5.3L & 6.0L | First Step 15 ft. lbs (20 N.m) Second Step 37 ft. lbs (50 N.m) Final Step 74 ft. lbs. (100 N.m) |
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| Fuel System 4.2L | |||
| Pressure Specification | 50-57 psi3 (45-395 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 assembly inside fuel tank | ||
| Fuel Filter R & I | See FUEL SENDER ASSEMBLY REPLACEMENT | ||
| Fuel System 5.3L | |||
| Pressure Specification | 55-62 psi (385-425 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 assembly inside fuel tank | ||
| Fuel Filter R & I | See FUEL SENDER ASSEMBLY REPLACEMENT | ||
| Fuel System 6.0L | |||
| Pressure Specification | 55-62 psi (385-425 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 assembly inside fuel tank | ||
| Fuel Filter R & I | See FUEL SENDER ASSEMBLY REPLACEMENT | ||
| Ignition | |||
| Firing Order & Cylinder Identification | |||
| 4.2L | FIRING ORDER & CYLINDER IDENTIFICATION | ||
| 5.3L & 6.0L | FIRING ORDER & CYLINDER IDENTIFICATION | ||
| Ignition Wires (Resistance) | 5.3L & 6.0L 397-1,337 ohms | ||
| Ignition Wires (Routing) | |||
| 4.2L | Coil On Plug | ||
| 5.3L | Coils are directly above Spark Plugs | ||
| 6.0L | Coils are directly above Spark Plugs | ||
| Spark Plug | |||
| 4.2L (Type = AC 41-981) | |||
| Gap | 0.0425 in (1.08 mm) | ||
| Torque | 13 lb ft (18 N.m) | ||
| 5.3L & 6.0L (Type = GM P/N 12571164 or AC Spark Plug P/N 41-985) | |||
| Gap | Iridium .040 in. (1.04 mm Platinum .060 in. (1.52 mm) |
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| Torque | 11 lb ft (15 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) | ||