Fastener Tightening Specifications
| Application | Specification |
|---|
| Metric | English |
| Air Cleaner Outlet Duct Clamp Screw (4.8L, 5.3L, and 6.0L Engines) | 7 N.m | 62 lb in |
| Air Cleaner Outlet Duct Wingnut (4.3L Engine) | 3 N.m | 27 lb in |
| Coolant Air Bleed Pipe Stud/Bolt (4.8L, 5.3L, and 6.0L Engines) | 12 N.m | 106 lb in |
| Coolant Heater Cord Bolt | 8 N.m | 71 lb in |
| Coolant Heater Bolt (4.3L Engine) | 2 N.m | 18 lb in |
| Coolant Heater (4.8L, 5.3L, 6.0L Engines) | 50 N.m | 37 lb ft |
| Engine Block Coolant Drain Plug (4.3L Engine) | 20 N.m | 15 lb ft |
| Engine Coolant Temperature Sensor (6.6L Engine) | 33 N.m | 24 lb ft |
| Fan Clutch Bolt | 23 N.m | 17 lb ft |
| Fan Clutch Nut | 56 N.m | 41 lb ft |
| Fan Shroud Bolt | 9 N.m | 80 lb in |
| Fan and Water Pump Pulley Bolt (4.3L Engine) | 25 N.m | 18 lb ft |
| Oil Cooler Hose Adapter Bolt (6.0L Engine) | 12 N.m | 106 lb in |
| Oil Cooler Hose Bracket Bolt (6.0L Engine) | 25 N.m | 18 lb ft |
| Radiator Bolt | 25 N.m | 18 lb ft |
| Surge Tank Bolt/Nut | 9 N.m | 80 lb in |
| Thermostat Housing Bolt (4.8L, 5.3L, and 6.0L Engines) | 15 N.m | 11 lb ft |
| Transmission Control Module (TCM) Cover Bolt | 9 N.m | 80 lb in |
| Transmission Control Module (TCM) Electrical Connector Bolt | 8 N.m | 71 lb in |
| Water Outlet Stud (4.3L Engine) | 25 N.m | 18 lb ft |
| Water Pump Bolt (4.3L Engine) | 45 N.m | 33 lb ft |
| Water Pump Bolt (First Pass) (4.8L, 5.3L, and 6.0L Engines) | 15 N.m | 11 lb ft |
| Water Pump Bolt (Final Pass) (4.8L, 5.3L, and 6.0L Engines) | 30 N.m | 22 lb ft |
Fastener Tightening Specifications
Scheme 1
Scheme 1: Engine Cooling Schematics
Scheme 2
Scheme 2: Cooling System Component Views
| Callout | Component Name |
|---|
| 1 | A/C Low Pressure Switch |
| 2 | A/C Accumulator |
| 3 | Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor |
| 4 | Coolant Level Switch (If Equipped) |
