GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Upper Intake Manifold and Components


Object Number: 686824  Size: LF
(1)EGR Valve Gasket
(2)EGR Valve Assembly
(3)EGR Valve Pipe Assembly Bolt
(4)EGR Valve Pipe Assembly
(5)Upper Intake Manifold Stud
(6)Upper Intake Manifold
(7)Upper Intake Manifold Bolt
(8)Thermostat Bypass Pipe
(9)Thermostat Bypass Pipe Nut
(10)Thermostat Bypass Hose Clamp
(11)Thermostat Bypass Hose
(12)Thermostat Bypass Pipe Screw
(13)Thermostat Bypass Hose Clamp
(14)Coolant Outlet Bolt
(15)Coolant Outlet Assembly
(16)Thermostat
(17)Oil Fill Cap
(18)PCV Valve
(19)PCV Valve Grommet
(20)Rocker Arm Cover Bolt
(21)Rocker Arm Cover
(22)Exhaust Crossover Nut
(23)Exhaust Crossover Pipe
(24)Exhaust Crossover Upper Heat Shield
(25)EVAP Canister Purge Valve Bracket Stud
(26)EVAP Canister Purge Valve Bracket
(27)EVAP Canister Purge Valve
(28)Spark Plug Wire Support
(29)Electronic Ignition System Nut
(30)Electronic Ignition System
(31)Electronic Ignition System Bolt
(32)Electronic Ignition System Bolt
(33)Upper Intake Manifold Gasket
(34)Upper Intake Manifold Gasket
Figure 2:

Lower Intake Manifold, Cylinder Head, and Components


Object Number: 646530  Size: LF
(1)Front Engine Lift Bracket (N Car)
(2)Engine Mount Strut and Generator Mount Bracket (N Car)
(3)Engine Mount Strut and Generator Mount Bracket Bolt (N Car)
(4)Heated Oxygen Sensor
(5)Fuel Injector Wiring Harness
(6)Fuel Injector Rail Assembly Bolt
(7)Fuel Injector Rail Assembly
(8)Rear Engine lift Bracket (N Car)
(9)Rear Engine lift Bracket Bolt (N Car)
(10)Engine Mount Strut and Engine Lift Bracket (W Car)
(11)Engine Mount Strut and Engine Lift Bracket Bolt (W Car)
(12)Lower Intake Manifold Diagonal Bolt
(13)Lower Intake Manifold Vertical Bolt
(14)Engine Coolant Temperature Sensor
(15)Push Rod
(16)Valve Rocker Arm
(17)Valve Rocker Arm Bolt
(18)Cylinder Head Bolt
(19)Cylinder Head Bolt
(20)Valve Spring Cap Key
(21)Valve Spring Cap
(22)Valve Spring
(23)Valve Stem Oil Stem Seal/Valve Spring Seat
(24)Cylinder Head Bolt
(25)Cylinder Head
(26)Left Exhaust Manifold Gasket
(27)Exhaust Crossover Stud
(28)Left Exhaust Manifold
(29)Left Exhaust Manifold Stud
(30)Left Exhaust Manifold Nut
(31)Left Exhaust Manifold Heat Shield Bolt
(32)Left Exhaust Manifold Heat Shield
(33)Intake Valve
(34)Exhaust Valve
(35)Cylinder Head Gasket
(36)Lower Intake Manifold Gasket
(37)Lower Intake Manifold Gasket
(38)Left Spark Plug Wires
(39)Engine Mount Strut and Generator Mount Bracket Bolt (W Car)
(40)Engine Mount Strut and Generator Mount Bracket (W Car)
(41)Front Engine Lift Bracket (W Car)
(42)Right Spark Plug Wires
(43)Right Exhaust Manifold
(44)Right Exhaust Manifold Nut
(45)Right Exhaust Manifold Stud
(46)Right Exhaust Manifold Lower Heat Shield Bolt
(47)Right Exhaust Manifold Lower Heat Shield
(48)Lower Intake Manifold
(49)Right Exhaust Manifold Gasket
(50)Right Exhaust Manifold Upper Heat Shield
(51)Right Exhaust Manifold Upper Heat Shield Bolt
Figure 3:

Engine Block and Components


Object Number: 646526  Size: LF
(1)Camshaft Sprocket Bolt
(2)Camshaft Sprocket
(3)Camshaft Thrust Plate Screw
(4)Camshaft Thrust Plate
(5)Camshaft Sprocket Alignment Pin
(6)Camshaft
(7)Front Camshaft Bearing
(8)Intermediate Camshaft Bearings
(9)Rear Camshaft Bearing
(10)Valve Lifter Guide Bolt
(11)Crankshaft Position Sensor Side-of-Block Stud
(12)Crankshaft Position Sensor Side-of-Block
(13)Valve Lifter
(14)Camshaft Position Sensor
(15)Camshaft Position Sensor Bolt
(16)Valve Lifter Guide
(17)Oil Pump Drive Assembly
(18)Oil Pump Drive Clamp
(19)Oil Pump Drive Clamp Bolt
(20)Upper Piston Compression Ring
(21)Lower Piston Compression Ring
(22)Oil Control Ring Assembly
(23)Piston Pin
(24)Piston
(25)Connecting Rod
(26)Connecting Rod Bolt
(27)Upper Connecting Rod Bearing Insert
(28)Lower Connecting Rod Bearing Insert
(29)Connecting Rod Bearing Cap
(30)Connecting Rod Bearing Cap Nut
(31)Oil Gallery 1/8 inch Plug
(32)Oil Gallery 1/4 inch Plug
(33)Camshaft Rear Cover
(34)Coolant Jacket Press-in-Plug
(35)Transmission Dowel Pin
(36)Engine Block
(37)Coolant Jacket Press-in-Plug
(38)Coolant Drain Plug
(39)Oil Filter
(40)Oil Filter Fitting
(41)Knock Sensor
(42)Timing Chain Dampener
(43)Timing Chain Dampener Bolt
(44)Engine Front Cover Alignment Pin
(45)Engine Front Cover Bolt
(46)Crankshaft Position Sensor
(47)Crankshaft Front Oil Seal
(48)Crankshaft Position Sensor Bolt
(49)Water Pump
(50)Water Pump Bolt
(51)Water Pump Pulley
(52)Water Pump Pulley Bolt
(53)Engine Mount Support and Strut Bracket Bolt (N car)
(54)Water Pump Gasket
(55)Engine Mount Support and Strut Bracket (N car)
(56)Drive Belt Tensioner Bolt
(57)Drive Belt Tensioner
(58)Engine Front Cover
(59)Engine Front Cover Gasket
(60)Oil Gallery Press-in-Plug
(61)Oil Gallery 1/4 inch Plug
Figure 4:

Crankshaft and Components


Object Number: 650012  Size: LF
(1)Crankshaft Balancer Bolt
(2)Crankshaft Balancer Washer
(3)Crankshaft Balancer
(4)Crankshaft Sprocket
(5)Timing Chain
(6)Crankshaft Balancer Key
(7)Crankshaft Upper Main Bearing Insert
(8)Rear Crankshaft Oil Seal
(9)Engine Flywheel
(10)Engine Flywheel Retainer
(11)Engine Flywheel Bolt
(12)Oil Level Indicator Assembly
(13)Oil Pan Gasket
(14)Crankshaft Oil Deflector Nut
(15)Starter Motor
(16)Starter Motor Short Bolt
(17)Starter Motor Long Bolt
(18)Oil Pan Side Bolt
(19)Oil Pan Bolt
(20)Low Oil Level Indicator Bolt - if equipped
(21)Low Oil Level Indicator - if equipped
(22)Oil Pan
(23)Oil Pan Drain Plug Washer
(24)Oil Pan Drain Plug
(25)Oil Pump Bolt
(26)Oil Pump
(27)Oil Pump Drive Shaft
(28)Oil Pan Side Bolt
(29)Crankshaft Main Bearing Cap Stud
(30)Crankshaft Oil Deflector
(31)Crankshaft Main Bearing Cap
(32)Oil Pump Alignment Pin
(33)Crankshaft Rear Main Bearing Cap
(34)Crankshaft Main Bearing Bolt
(35)Crankshaft Lower Main Bearing Insert
(36)Crankshaft