Specifications Index
SIERRA, SILVERADO, SUBURBAN, TAHOE & YUKON SPECIFICATIONS INDEX
| System | Specification/Procedure | ||
|---|---|---|---|
| Air Conditioning - Automatic System | |||
| Service | REFRIGERANT SYSTEM SPECIFICATIONS | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Air Conditioning - Manual System | |||
| Service | REFRIGERANT SYSTEM SPECIFICATIONS | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Axle Shaft Nut | 177 Ft. Lbs (240 N.m) | ||
| Battery | BATTERY USAGE | ||
| Brakes | |||
| Bleeding Sequence | RR, LR, RF, LF also see HYDRAULIC BRAKE SYSTEM BLEEDING (MANUAL) | ||
| Disc Brakes | DISC BRAKE COMPONENT SPECIFICATIONS | ||
| Charging | |||
| Generator | GENERATOR USAGE | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Drive Belts | |||
| Adjustment | Serpentine belt tension is maintained automatically by a spring-tensioned idler pulley. No adjustment is necessary. | ||
| Belt Routing | See appropriate routing illustration under DRIVE BELT REPLACEMENT
For 4.3L Or DRIVE BELT REPLACEMENT - ACCESSORY For 4.8L, 5.3L, and 6.0L Or DRIVE BELT REPLACEMENT For 6.6L Or DRIVE BELT REPLACEMENT - ACCESSORY For 8.1L |
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| Engine Cooling | |||
| General Service Specifications | FASTENER TIGHTENING SPECIFICATIONS | ||
| Radiator Cap Pressure | 15 psi | ||
| Thermostat R&I | |||
| 4.3L | ENGINE COOLANT THERMOSTAT REPLACEMENT (4.3L ENGINE) | ||
| 4.8L, 5.3L & 6.0L | ENGINE COOLANT THERMOSTAT REPLACEMENT (4.8L, 5.3L, AND 6.0L ENGINES) | ||
| 6.6L | ENGINE COOLANT THERMOSTAT REPLACEMENT (6.6L ENGINE) | ||
| 8.1L | ENGINE COOLANT THERMOSTAT REPLACEMENT (8.1L ENGINE) | ||
| Water Pump R&I | |||
| 4.3L | WATER PUMP REPLACEMENT (4.3L ENGINE) | ||
| 4.8L, 5.3L & 6.0L | WATER PUMP REPLACEMENT (4.8L, 5.3L, AND 6.0L ENGINES) | ||
| 6.6L | WATER PUMP REPLACEMENT (6.6L ENGINE) | ||
| 8.1L | WATER PUMP REPLACEMENT (8.1L ENGINE) | ||
| Engine Mechanical | |||
| 4.3L | |||
| Compression | Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 100 psi (7 kg/cm2 ). | ||
| Oil Pressure (at normal operating temperature | 6 psig at 1,000 RPM 18 psig at 2,000 RPM 24 psig at 4,000 RPM |
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| Overhaul | ENGINE MECHANICAL SPECIFICATIONS
For Service Or ENGINE MECHANICAL SPECIFICATIONS For Unit Repair (Overhaul) |
||
| Torque | ENGINE MECHANICAL FASTENER TIGHTENING SPECIFICATIONS
For Service Or FASTENER TIGHTENING SPECIFICATIONS For Unit Repair (Overhaul) |
||
| 4.8L, 5.3L & 6.0L | |||
| Compression | Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 100 psi (7 kg/cm2 ). | ||
| Oil Pressure (at normal operating temperature) | 6 psi (.4 kg/cm2
) @ 1000 RPM 18 psi. (1.3 kg/cm2 ) @ 2000 RPM 24 psi. (1.7 kg/cm2 ) @ 4000 RPM |
||
| Overhaul | SPECIFICATIONS
Service OR SPECIFICATIONS For Unit Repair (Overhaul) |
||
| Torque | SPECIFICATIONS TORQUE SPECIFICATIONS For Service Or SPECIFICATIONS For Unit Repair (Overhaul) | ||
| 6.6L | |||
| Compression | Production 458 psi (32 kg/cm2
). No More Than 50 psi (3.0 kg/cm2 ) Difference Between Average Of All 8 Cylinders |
||
| Oil Pressure | Normal oil pressure is 14 psi (.99 kg/cm2 ) at idle and 42 psi (3.0 kg/cm2 ) at 1800 RPM. | ||
| Overhaul | ENGINE MECHANICAL SPECIFICATIONS In 6.6L - Unit Repair (Overhaul) | ||
| Torque | ENGINE MECHANICAL FASTENER TIGHTENING SPECIFICATIONS
For Service Or ENGINE MECHANICAL FASTENER TIGHTENING SPECIFICATIONS For Unit Repair (Overhaul) |
||
| 8.1L | |||
| Compression | Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 100 psi (7 kg/cm2 ). | ||
| Oil Pressure | 5 psi (.35kg/cm2
) @ 1000 RPM 10 psi (.70 kg/cm2 ) @ 2000 RPM |
||
| Overhaul | ENGINE MECHANICAL SPECIFICATIONS
For Service Or ENGINE MECHANICAL SPECIFICATIONS For 8.1L - Unit Repair (Overhaul) |
||
| Torque | FASTENER TIGHTENING SPECIFICATIONS
For Service Or ENGINE MECHANICAL FASTENER TIGHTENING SPECIFICATIONS For 8.1L - Unit Repair (Overhaul) |
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| 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 Torque | |||
| 4.3L For tightening sequence, see appropriate illustration under ENGINE FLYWHEEL REPLACEMENT |
74 Ft. Lbs. (100 N.m) | ||
| 4.8L, 5.3L, 6.0L Tighten bolts in sequence. See illustration under ENGINE FLYWHEEL REPLACEMENT |
Step 1, 15 Ft. Lbs. (20 N.m) Step 2, 37 Ft. Lbs. (50 N.m) Step 3, 74 Ft. Lbs. (100 N.m) |
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| 6.6L Tighten bolts in sequence. See illustration under ENGINE FLYWHEEL REPLACEMENT - AUTOMATIC TRANSMISSION for A/T Or ENGINE FLYWHEEL REPLACEMENT - MANUAL TRANSMISSION For M/T |
Step 1, 58 Ft. Lbs. (78 N.m) Step 2 Additional 60 Degrees Step 3 Additional 60 Degrees |
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| 8.1L | First Pass, 59 Ft. Lbs. (80 N.m) Final Pass, 74 Ft. Lbs. (100 N.m) |
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| Fuel System | |||
| Pressure Specification | |||
| 4.3L | 60-66 psi (4.2-4.6 kg/cm2 ) | ||
| 4.8L, 5.3L, 6.0L & 8.1L | 55-62 psi (3.9-4.4 kg/cm2 ) | ||
| 6.6L | See FUEL SYSTEM DIAGNOSIS (PICKUP) Or FUEL SYSTEM DIAGNOSIS (CAB CHASSIS) |
||
| Fuel Pressure Test Procedure | |||
| 4.3L | FUEL SYSTEM DIAGNOSIS | ||
| 4.8L, 5.3L & 6.0L | FUEL SYSTEM DIAGNOSIS | ||
| 6.6L | See FUEL SYSTEM DIAGNOSIS (PICKUP) Or FUEL SYSTEM DIAGNOSIS (CAB CHASSIS) |
||
| 8.1L | FUEL SYSTEM DIAGNOSIS | ||
| Ignition | |||
| Firing Order & Cylindeer Identification | See FIRING ORDER & CYLINDER IDENTIFICATION | ||
| Ignition Wires (Resistance) | |||
| 4.3L | 1,000 ohms per ft | ||
| 4.8L, 5.3L & 6.0L | 1,000 ohms per ft | ||
| 8.1L | 1,000 ohms per ft | ||
| Ignition Wires (Routing) | 4.3L Left Bank, See illustration under TOP OF THE ENGINE COMPONENTS (4.3L) Right Bank N/A 4.8L, 5.3L, 6.0L & 8.1L Plug wires route directly down to ignition coils |
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| Spark Plug | |||
| 4.3L | |||
| Type | Refer to Electronic Parts Catalogue | ||
| Gap | .060 in. (1.52 mm) | ||
| Torque | 11 ft. lbs. (15 N.m) | ||
| 4.8L, 5.3L & 6.0L | |||
| Type | Refer to Electronic Parts Catalogue | ||
| Gap | Iridium .040 in. (1.04 mm) Platinum .060 in. (1.52 mm) |
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| Torque | * For used heads tighten the spark plugs to 15 N.m (11 lb ft). * For new aluminum heads tighten the spark plugs to 20 N.m (15 lb ft). * For new iron heads, tighten the spark plugs to 30 N.m (22 lb ft). |
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| 8.1L | |||
| Type | Refer to Electronic Parts Catalogue | ||
| Gap | .060 in. (1.52 mm) | ||
| Torque | IRON Head-all Subsequent Installations 15 ft. lbs. (20 N.m) NEW iron heads tighten the spark plugs to 22 ft. lbs. (30 N.m). |
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| Starting | |||
| Starter | STARTER USAGE | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Wheel Alignment | |||
| Adjustment | WHEEL ALIGNMENT SPECIFICATIONS | ||
| Torque | FASTENER TIGHTENING SPECIFICATIONS | ||
| Wheel & Tire | |||
| Wheel Lug Nut Torque | |||
| Single Wheel | 140 ft. lbs. (190 N.m) | ||
| Dual Wheel | 175 ft. lbs. (240 N.m) | ||