GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Mechanical - 6.6L (LB7) 🢒 Disassembled Views
Figure 1:

Front View Components - Federal Emissions
Object Number: 798864 Size: LF
(1)Idler Pulley Bolt
(2)Idler Pulley
(3)Idler Pulley Bolt
(4)Idler Pulley
(5)Generator Mounting Bracket Bolt
(6)Drive Belt Tensioner Bolt
(7)Drive Belt Tensioner
(8)Generator Mounting Bracket
(9)Fuel Injection Control Module Harness Bracket Nut
(10)Schrader Valve Bracket
(11)Schrader Valve
(12)Fuel Injection Control Module Harness Bracket
(13)Schrader Valve Hose
(14)Engine Assembly
(15)Power Steering Pump Bracket
(16)Power Steering Pump Bracket Bolt
(17)O-ring
(18)Water Pump Bolt
(19)Water Pump
(20)Water Pump Bolt
(21)Crankshaft Balancer Bolt
(22)Crankshaft Balancer Washer
(23)Crankshaft Balancer
(24)Cooling Fan Pulley Bolt
(25)Cooling Fan Pulley Nut
(26)Oil Seperator Cover Bolt
(27)Oil Seperator Cover
(28)Cooling Fan Pulley
(29)Cooling Fan Pulley Insulator
(30)Cooling Fan Pulley Stud
Figure 2:

Front View Components - California Emissions
Object Number: 881717 Size: LF
(1)Idler Pulley Bolt
(2)Idler Pulley
(3)Idler Pulley Bolt
(4)Idler Pulley
(5)Generator Mounting Bracket Bolt
(6)Drive Belt Tensioner Bolt
(7)Drive Belt Tensioner
(8)Generator Mounting Bracket
(9)Fuel Injection Control Module Harness Bracket Nut
(10)Schrader Valve Bracket
(11)Schrader Valve
(12)Fuel Injection Control Module Harness Bracket
(13)Schrader Valve Hose
(14)Engine Assembly
(15)Power Steering Pump Bracket
(16)Power Steering Pump Bracket Bolt
(17)O-ring
(18)Water Pump Bolt
(19)Water Pump
(20)Water Pump Bolt
(21)Crankshaft Balancer Bolt
(22)Crankshaft Balancer Washer
(23)Vacuum Pump Bolt- California Emissions
(24)Vacuum Pump Pulley - California Emissions
(25)Crankshaft Balancer
(26)Vacuum Pump - California Emissions
(27)Cooling Fan Pulley Nut
(28)Cooling Fan Pulley Bolt
(29)Oil Seperator Cover Bolt
(30)Oil Seperator Cover
(31)Cooling Fan Pulley
(32)Cooling Fan Pulley Insulator
(33)Cooling Fan Pulley Stud
Figure 3:

External Components
Object Number: 881719 Size: LF
(1)Fuel Injection Control Module Bracket
(2)Fuel Injection Control Module Bracket
(3)Fuel Injection Control Module Bracket Bolt
(4)Fuel Injection Control Module Bolt
(5)Fuel Injection Control Module Bolt
(6)Bracket
(7)Fuel Injection Control Module Insulator
(8)Fuel Injection Control Module Sleeve
(9)Fuel Injection Control Module Insulator
(10)Fuel Injection Control Module
(11)Fuel Filter Assembly
(12)Engine Wiring Harness
(13)Flex Plate
(14)Dowel Pin
(15)Flywheel Washer
(16)Flywheel Bolt
(17)Flywheel (Manual Transmission)
(18)Flywheel (Automatic Transmission)
(19)Dowel Pin
(20)Ring Gear
(21)O-ring
(22)O-ring
(23)Engine Oil Cooler
(24)Oil Filter
(25)Engine Oil Cooler Bolt
(26)Oil Pressure Sensor
(27)Engine Assembly
Figure 4:

Intake and Exhaust Components-Federal Emissions
Object Number: 798866 Size: LF
(1)Fuel Pipes Assembly
(2)Fuel Inlet Distribution Block
(3)Fuel Inlet Distribution Block Nut
(4)Fuel Inlet Distribution Block Bolt
(5)Fuel Pipe Bolt
(6)Fuel Pipe
(7)PCV Hose
(8)Intake Manifold Tube
(9)Turbocharger Boost Sensor Bracket
(10)Turbocharger Boost Sensor Bolt
(11)Turbocharger Boost Sensor
(12)Intake Manifold Tube Bolt
(13)Intake Heater Gasket
(14)Intake Heater
(15)Turbocharger Heat Shield (Upper)
(16)Turbocharger Heat Shield (Upper) Bolt
(17)Turbocharger
(18)Exhaust Outlet Adapter Gasket
(19)Exhaust Outlet Adapter
(20)Heat Shield
(21)Heat Shield Bolt
(22)Exhaust Outlet Adapter Nut
(23)Exhaust Outlet Adapter Stud
(24)Turbocharger Bolt
(25)Turbocharger Heat Shield (Lower)
(26)Intake Manifold
(27)Intake Manifold Bolt
(28)Exhaust Pipe Gasket
(29)Exhaust Pipe
(30)Exhaust Pipe Gasket
(31)Exhaust Pipe Bolt
(32)Exhaust Outlet Bracket
(33)Exhaust Pipe Bolt
(34)Exhaust Pipe Gasket
(35)Exhaust Pipe
(36)Heat Shield
(37)Heat Shield Bolt
(38)Exhaust Pipe Bolt
(39)Exhaust Pipe Gasket
(40)Exhaust Manifold Gasket
(41)Exhaust Manifold
(42)Exhaust Manifold Washer
(43)Exhaust Manifold Beveled Washer
(44)Exhaust Manifold Nut
(45)Heat Shield
(46)Heat Shield Bolt
(47)Exhaust Manifold Bolt
(48)Engine Assembly
(49)Exhaust Manifold
(50)Exhaust Manifold Bolt
(51)Heat Shield
(52)Heat Shield Bolt
(53)Exhaust Manifold Nut
(54)Exhaust Manifold Beveled Washer
(55)Exhaust Manifold Washer
(56)Exhaust Manifold Gasket
(57)Turbocharger Oil Supply Line Eye Bolt
(58)Turbocharger Oil Supply Line
(59)Intake Manifold Bolt
(60)Intake Manifold
(61)Intake Manifold Stud
(62)Intake Manifold Nut
(63)Intake Manifold Bolt
(64)Intake Manifold Stud
(65)Intake Manifold Tube Stud
(66)Intake Manifold Tube Gasket
(67)Intake Manifold Tube Nut
Figure 5:

Intake and Exhaust Components-California Emissions
Object Number: 798867 Size: LF
(1)Fuel Pipes Assembly
(2)Fuel Inlet Distribution Block
(3)Fuel Inlet Distribution Block Nut
(4)Fuel Inlet Distribution Block Bolt
(5)EGR Bolt
(6)EGR Valve
(7)EGR Valve Gasket
(8)EGR Cooler
(9)Heater Pipe Bracket
(10)EGR Nut
(11)Water Cooler Outlet Hose
(12)Water Cooler Outlet Hose Clamp
(13)EGR Cooler Bracket
(14)Water Hose Connector
(15)EGR Cooler Bracket Bolt
(16)Intake Throttle Nut
(17)EGR Stud
(18)Intake Throttle Gasket
(19)Fuel Pipe Bolt
(20)Fuel Pipe
(21)Intake Manifold Tube Stud
(22)Intake Manifold Tube Nut
(23)Intake Manifold Tube Gasket
(24)Intake Manifold Tube Bolt
(25)Intake Manifold Tube
(26)Intake Throttle Gasket
(27)EGR Orifice
(28)Intake Throttle Stud
(29)Intake Throttle
(30)Turbocharger Boost Sensor Hose
(31)Turbocharger Boost Sensor
(32)Turbocharger Boost Sensor Bolt
(33)Turbocharger Boost Sensor Bracket
(34)Intake Heater
(35)Intake Heater Gasket
(36)PCV Hose
(37)Turbocharger Heat Shield (Upper)
(38)Turbocharger Heat Shield (Upper) Bolt
(39)Turbocharger
(40)Exhaust Outlet Adapter Gasket
(41)Exhaust Outlet Adapter
(42)Heat Shield
(43)Heat Shield Bolt
(44)Exhaust Outlet Adapter Nut
(45)Exhaust Outlet Adapter Stud
(46)Turbocharger Bolt
(47)Turbocharger Heat Shield - Lower
(48)Intake Manifold
(49)Exhaust Pipe Gasket
(50)Exhaust Pipe - Right
(51)Exhaust Pipe Gasket
(52)Exhaust Pipe Bolt
(53)Exhaust Outlet Bracket
(54)Exhaust Pipe Bolt
(55)Exhaust Pipe Gasket
(56)Exhaust Pipe - Left
(57)Heat Shield
(58)Heat Shield Bolt
(59)Exhaust Pipe Bolt
(60)Exhaust Pipe Gasket
(61)Exhaust Manifold Gasket
(62)Exhaust Manifold
(63)Exhaust Manifold Washer
(64)Exhaust Manifold Beveled Washer
(65)Exhaust Manifold Nut
(66)Heat Shield
(67)Heat Shield Bolt
(68)Exhaust Manifold Bolt
(69)Engine Assembly
(70)Exhaust Manifold
(71)Exhaust Manifold Bolt
(72)Heat Shield
(73)Heat Shield Bolt
(74)Exhaust Manifold Nut
(75)Exhaust Manifold Beveled Washer
(76)Exhaust Manifold Washer
(77)Exhaust Manifold Gasket
(78)Intake Manifold
(79)Turbocharger Oil Supply Line Eye Bolt
(80)Turbocharger Oil Supply Line
(81)Intake Manifold Bolt
(82)Intake Manifold Bolt
(83)Intake Manifold Stud
(84)Intake Manifold Nut
Figure 6:

Engine Cover Components
Object Number: 692526 Size: LF
(1)Coolant Temperature Sensor
(2)Thermostat (Front)
(3)Thermostat (Rear)
(4)Heater Pipe Bolt
(5)Heater Pipe
(6)Thermostat Cover
(7)Thermostat Cover Bolt
(8)Water Outlet O-ring
(9)Water Outlet Bolt
(10)Water Outlet
(11)Water Outlet Bolt
(12)Oil Fill Cap
(13)Oil Fill Tube Bolt
(14)Oil Fill Tube
(15)Oil Fill Tube O-ring
(16)Engine Front Cover
(17)Fuel Injection Pump Bolt
(18)Engine Assembly
(19)Fuel Injection Pump
(20)Flywheel Housing Cover Bolt
(21)Flywheel Housing Cover
(22)Flywheel Housing Cover Gasket
(23)Flywheel Housing O-ring
(24)Flywheel Housing
(25)Flywheel Housing Bolt
(26)Dowel Pin
(27)Crankshaft Rear Oil Seal
(28)Engine Oil Cooler Adapter Gasket
(29)Engine Oil Cooler Adapter Bolt
(30)Engine Oil Cooler Adapter Bolt
(31)Engine Oil Cooler Adapter
(32)Engine Oil Cooler Adapter Gasket
(33)Oil Pump Pipe and Screen Assembly Bolt
(34)Oil Pump Pipe and Screen Assembly
(35)Oil Pump Pipe and Screen Assembly Gasket
(36)Oil Level Tube Bolt
(37)Oil Level Tube
(38)Oil Level Tube O-ring
(39)Oil Level Sensor Bolt
(40)Lower Oil Pan Stud
(41)Oil Level Sensor
(42)Retainer
(43)Lower Oil Pan Bolt
(44)Oil Drain Plug
(45)Oil Drain Plug Gasket
(46)Lower Oil Pan
(47)Upper Oil Pan Bolt
(48)Upper Oil Pan
(49)Oil Pump
(50)Oil Pump Bolt
(51)Oil Pump Driven Gear
(52)Oil Pump Driven Gear Nut
(53)Engine Front Cover
(54)Engine Front Cover Bolt
(55)Oil Pressure Relief Valve
(56)Thermostat Bypass Pipe Gasket
(57)Thermostat Bypass Pipe Bolt
(58)Thermostat Bypass Pipe
(59)Thermostat Bypass Pipe O-ring
(60)Thermostat Housing Bolt
(61)Thermostat Housing Nut
(62)Thermostat Housing Bolt
(63)Thermostat Housing Nut
(64)Thermostat Housing
(65)Thermostat Housing Gasket
(66)Thermostat Housing Stud
(67)Camshaft Position Sensor O-ring
(68)Camshaft Position Sensor
(69)Camshaft Position Sensor Bolt
(70)Crankshaft Position Sensor Bolt
(71)Crankshaft Position Sensor
(72)Crankshaft Position Sensor O-ring
Figure 7:

Top View Components
Object Number: 692527 Size: LF
(1)Fuel Injector Pipe (Cylinder 1)
(2)Fuel Injector Pipe (Cylinder 3)
(3)Fuel Injector Pipe (Cylinder 5)
(4)Fuel Injector Pipe (Cylinder 7)
(5)Right Fuel Rail
(6)Fuel Rail Bolts
(7)Left Fuel Rail
(8)Fuel Injector Pipe (Cylinder 2)
(9)Fuel Injector Pipe (Cylinder 4)
(10)Fuel Injector Pipe (Cylinder 6)
(11)Fuel Injector Pipe (Cylinder 8)
(12)Glow Plug Controller Bracket
(13)Glow Plug Controller (Federal Emissions)
(14)Glow Plug Controller (CA Emissions)
(15)Valve Rocker Arm Cover (Upper)
(16)Valve Rocker Arm Cover (Upper) Bolt
(17)Valve Rocker Arm Cover (Lower) Bolt
(18)Valve Rocker Arm Cover (Lower)
(19)Valve Rocker Arm cover Gasket
(20)Engine Assembly
(21)Valve Rocker Arm Cover Gasket
(22)Valve Rocker Arm Cover (Lower)
(23)Valve Rocker Arm Cover (Upper) Bolt
(24)Valve Rocker Arm Cover (Upper)
Figure 8:

Engine Block Components
Object Number: 692529 Size: LF
(1)Cylinder Head Bolt
(2)Cylinder Head
(3)Cylinder Head Gasket
(4)Valve Lifter
(5)Valve Lifter Guide
(6)Valve Lifter Guide Bracket
(7)Cylinder Head Bolt
(8)Cylinder Head
(9)Cylinder Head Gasket
(10)Dowel Pin
(11)Engine Block
(12)Engine Block Plug Gasket
(13)Engine Block Plug
(14)Crankshaft Bearing Cap M8 Bolt
(15)Engine Block Plug
(16)Connecting Rod Cap
(17)Connecting Rod Bearing
(18)Connecting Rod Bearing
(19)Connecting Rod Bushing
(20)Piston Pin
(21)Piston Pin Retainer
(22)Piston
(23)Oil Control Ring
(24)Compression Ring (2nd)
(25)Compression Ring (1st)
(26)Connecting Rod
(27)Connecting Rod Bolt
(28)Thrust Bearing
(29)Crankshaft Bearing (Upper)
(30)Thrust Bearing
(31)Crankshaft Bearing (Lower)
(32)Dowel Pin
(33)Crankshaft Bearing Cap (5th)
(34)Crankshaft Bearing Cap Bolt
(35)Crankshaft Bearing Cap
(36)Thrust Bearing
(37)Crankshaft Position Sensor Exciter Ring Bolt
(38)Crankshaft Position Sensor Exciter Ring
(39)Crankshaft Position Sensor Exciter Ring Pin
(40)Oil Pump Drive Gear
(41)Crankshaft Gear
(42)Crankshaft
(43)Crankshaft Pin
(44)Camshaft Position Sensor Exciter Ring Bolt
(45)Camshaft Position Sensor Exciter Ring Pin
(46)Camshaft Position Sensor Exciter Ring
(47)Camshaft Gear Bolt
(48)Camshaft Gear Washer
(49)Camshaft Gear
(50)Camshaft Thrust Plate Bolt
(51)Camshaft Thrust Plate
(52)Camshaft Pin
(53)Camshaft
(54)Engine Block Plug
(55)Camshaft Bearing (Front)
(56)Camshaft Bearing
(57)Engine Block Plug
(58)Engine Block Heater
Figure 9:

Cylinder Head Components
Object Number: 692530 Size: LF
(1)Cylinder Head
(2)Rocker Arm Shaft Plug
(3)Rocker Arm Shaft Mount
(4)Rocker Arm Shaft Mount Bolt
(5)Rocker Arm Shaft Assembly Lock Nut
(6)Rocker Arm Shaft Assembly
(7)Fuel Injector Harness
(8)Fuel Injector Harness Bolt
(9)Valve Bridge Pin
(10)Valve Bridge
(11)Valve Key
(12)Valve Spring Seat (Upper)
(13)Valve Spring
(14)Valve Spring Seat (Lower)
(15)Fuel Injector Gasket
(16)Fuel Injector Seal (O-ring)
(17)Fuel Injector
(18)Fuel Injector Bracket Bolt
(19)Fuel Injector Bracket
(20)Fuel Return Pipe
(21)Fuel Return Pipe Bolt
(22)Fuel Return Pipe Gasket
(23)Glow Plug
(24)Glow Plug Connector-Model Dependent (Federal Emissions)
(25)Glow Plug Connector-Model Dependent (CA Emissions)
(26)Cylinder Head
(27)Exhaust Valve
(28)Pushrod
(29)Valve Clearance Adjusting Screw
Figure 10:

Valve Rocker Arm Upper Components
Object Number: 692532 Size: SF
(1)Valve Rocker Arm Cover (Upper)
(2)Valve Rocker Arm Cover (Upper)
(3)Fuel Injector Seal
(4)PCV Spring
(5)PCV Diaphragm
(6)PCV Cover
(7)PCV Cover Bolt
Figure 11:

Oil Pump Components
Object Number: 692534 Size: MF
(1)Oil Pump Cover
(2)Oil Pump Cover Bolt
(3)Oil Pump Drive Gear
(4)Oil Pump Driven Gear
(5)Oil Pump Housing
(6)Oil Pump Gear
(7)Oil Pump Gear Nut