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

Throttle Body and Intake Manifold


Object Number: 644064  Size: LF
(1)Air Cleaner Outlet Rear Duct
(2)Air Cleaner Outlet Front Duct
(3)Air Cleaner Box
(4)Intake Air Temperature Sensor
(5)Intake Manifold Rear Crossover Pipe
(6)Throttle Body
(7)Intake Manifold
(8)Intake Manifold Front Crossover Pipe
Figure 2:

Primary Timing Chain and Tensioner


Object Number: 648099  Size: MF
(1)Right Primary Timing Chain Camshaft Intake Sprocket
(2)Primary Timing Chain
(3)Primary Timing Chain Upper Guide
(4)Primary Timing Chain Lower Guide
(5)Primary Timing Chain Crankshaft Sprocket
(6)Timing Chain Drive Intermediate Sprocket Shaft
(7)Timing Chain Idler Sprocket
(8)Primary Timing Chain Idler Sprocket Washer
(9)Primary Timing Chain Idler Sprocket
(10)Primary Timing Chain Idler Sprocket Shaft
(11)Primary Timing Chain Tensioner Shoe
(12)Primary Timing Chain Tension Adjuster
Figure 3:

Left Secondary Timing Chain and Tensioner


Object Number: 648098  Size: MF
(1)Camshaft Sprocket Bolt
(2)Left Camshaft Intake Sprocket
(3)Left Secondary Timing Chain
(4)Left Secondary Timing Chain Upper Guide
(5)Secondary Timing Chain Idler Sprocket
(6)Left Secondary Timing Chain Lower Guide
(7)Left Camshaft Exhaust Sprocket
(8)Left Secondary Timing Chain Tensioner
Figure 4:

Camshafts and Lifters


Object Number: 648090  Size: LF
(1)Right Exhaust Camshaft Bearing Caps
(2)Right Intake Camshaft Bearing Caps
(3)Right Exhaust Camshaft
(4)Right Intake Camshaft
(5)Left Secondary Timing Chain Upper Guide
(6)Left Intake Camshaft Bearing Caps
(7)Left Exhaust Camshaft Bearing Caps
(8)Left Intake Camshaft
(9)Left Exhaust Camshaft
(10)Valve Lifter
(10)Valve Lifter
(11)Left Camshaft Holder
(12)Right Secondary Timing Chain Tensioner
(13)Right Secondary Timing Chain
(14)Right Secondary Timing Chain Upper Guide
Figure 5:

Oil Pump Drive Chain and Chain Tensioner


Object Number: 648096  Size: MF
(1)Oil Pump Drive Chain
(2)Oil Pump Drive Sprocket
(3)Oil Pump Drive Chain Tensioner
Figure 6:

Valves and Cylinder Heads


Object Number: 648088  Size: LF
(1)Valve Guide
(1)Valve Guide
(2)Right Cylinder Head
(3)Left Cylinder Head
(4)Valve Stem Key
(4)Valve Stem Key
(5)Valve Spring Retainer
(5)Valve Spring Retainer
(6)Valve Stem Oil Seal
(6)Valve Stem Oil Seal
(7)Valve Spring Inner
(7)Valve Spring Inner
(8)Valve Spring Outer
(8)Valve Spring Outer
(9)Valve Spring Seat
(9)Valve Spring Seat
(10)Exhaust Valve
(10)Exhaust Valve
(11)Intake Valve
(11)Intake Valve
(12)Left Cylinder Head Gasket
(13)Cylinder Block
(14)Right Cylinder Head Gasket
Figure 7:

Crankshaft Bearings, Crankshaft and Engine Block


Object Number: 648076  Size: LF
(1)Engine Block
(2)Transmission Adapter
(3)Lower Crankcase O-ring Seal
(4)Flywheel
(5)Crankshaft Rear Oil Seal
(6)Crankshaft
(7)Lower Crankcase
(8)Crankshaft Bearing
(9)Crankshaft Thrust Bearing
(10)Timing Chain Oil Nozzle
(11)Water Pump
(12)Water Pump O-ring Rear Seal