Contents Wiring diagrams Section: Cooling System (Mechanical) All sections

Engine Cooling System: Specifications Chevrolet Silverado 2500 HD

Cooling System (Mechanical) 5 illustrations

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Air Cleaner Outlet Duct Clamp4 N.m35 lb in
Coolant Air Bleed Pipe Bolts12 N.m9 lb ft
Coolant Heater50 N.m37 lb ft
Coolant Heater Cord Bolt8 N.m71 lb in
Cooling Fan Motor Bolts10 N.m89 lb in
Cooling Fan Shroud Bolts9 N.m80 lb in
Differential Carrier Bolts100 N.m74 lb ft
Fan Clutch Bolts23 N.m17 lb ft
Fan Clutch Bolts56 N.m41 lb ft
Oil Cooler Hose Adapter Bolt12 N.m106 lb in
Oil Cooler Hose Bracket Bolt25 N.m18 lb ft
Oil Pan Skid Plate Bolts20 N.m15 lb ft
Radiator Bolt25 N.m18 lb ft
Surge Tank Bolt/Nut10 N.m89 lb in
TCM Cover Bolts9 N.m80 lb in
TCM Electrical Connector Bolts8 N.m71 lb in
Transmission Cooling Line Bolts4 N.m35 lb in
Water Pump
First Pass15 N.m11 lb ft
Final Pass30 N.m22 lb ft
Water Pump Inlet Bolt15 N.m11 lb ft

Fastener Tightening Specifications

Scheme 1

Scheme 1: Engine Cooling Schematics

Scheme 2

Scheme 2

Scheme 3

Scheme 3: Cooling System Component Views
CalloutComponent Name
1Cooling Fan - Left
2Cooling Fan - Right
3Forward Lamp Harness

Scheme 4

Scheme 4
CalloutComponent Name
1Engine
2Front Fascia
3A/C Low Pressure Switch (C67/CJ2)
4Surge Tank
5Engine Coolant Level Switch

Scheme 5

Scheme 5: Cooling Fan - Left (Gas)
Connector Part Information OEM: 15454358 Service: 88987983 Description: 2-Way F 630 GT (BK)
Terminal Part Information Terminal/Tray: 15476168/5 Core/Insulation Crimp: F/3 Release Tool/Test Probe: 15315247/J-35616-42 (RD)

Cooling Fan - Left (Gas) Connector Parts Information

PinWire ColorCircuit No.Function
A5 YE5358Auxiliary Cooling Fan Motor Supply Voltage
B5 L-BU409Cooling Fan Motor Supply Voltage

Cooling Fan - Left (Gas) Connector Terminal Identification