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

Stage One


Object Number: 1961821  Size: LF
(1)Left Intake Camshaft Position (CMP) Actuator Timing Mark
(2)Left Intake Secondary Camshaft Timing Drive Chain Timing Link
(3)Left Exhaust Camshaft Position (CMP) Actuator Timing Mark
(4)Left Exhaust Secondary Camshaft Timing Drive Chain Timing Link
(5)Left Secondary Camshaft Timing Drive Chain
(6)Primary Camshaft Drive Chain Timing Link for the Left Primary Camshaft Intermediate Drive Chain Sprocket
(7)Left Primary Camshaft Intermediate Drive Chain Sprocket Timing Mark for the Primary Camshaft Drive Chain
(8)Left Primary Camshaft Intermediate Drive Chain Sprocket
(9)Left Secondary Camshaft Timing Drive Chain Timing Link for the Left Primary Camshaft Intermediate Drive Chain Sprocket
(10)Left Primary Camshaft Intermediate Drive Chain Sprocket Timing Window for the Left Secondary Camshaft Timing Drive Chain Timing Link
(11)Primary Camshaft Drive Chain
(12)Primary Camshaft Drive Chain Timing Link for the Crankshaft Sprocket
(13)Crankshaft Sprocket Timing Mark
(14)Crankshaft Sprocket
(15)Right Primary Camshaft Intermediate Drive Chain Sprocket
(16)Primary Camshaft Drive Chain Timing Link for the Right Primary Camshaft Intermediate Drive Chain Sprocket
(17)Right Primary Camshaft Intermediate Drive Chain Sprocket Timing Mark
Figure 2:

Stage Two


Object Number: 1961822  Size: LF
(1)Left Intake Camshaft Position (CMP) Actuator Timing Mark
(2)Left Intake Secondary Camshaft Timing Drive Chain Timing Link
(3)Left Exhaust Camshaft Position (CMP) Actuator Timing Mark
(4)Left Exhaust Secondary Camshaft Timing Drive Chain Timing Link
(5)Left Secondary Camshaft Timing Drive Chain
(6)Primary Camshaft Drive Chain Timing Link for the Left Primary Camshaft Intermediate Drive Chain Sprocket
(7)Left Primary Camshaft Intermediate Drive Chain Sprocket Timing Mark for the Primary Camshaft Drive Chain
(8)Left Primary Camshaft Intermediate Drive Chain Sprocket
(9)Left Secondary Camshaft Timing Drive Chain Timing Link for the Left Primary Camshaft Intermediate Drive Chain Sprocket
(10)Left Primary Camshaft Intermediate Drive Chain Sprocket Timing Window
(11)Primary Camshaft Drive Chain
(12)Primary Camshaft Drive Chain Timing Link for the Crankshaft Sprocket
(13)Crankshaft Sprocket Timing Mark
(14)Crankshaft Sprocket
(15)Right Primary Camshaft Intermediate Drive Chain Sprocket
(16)Primary Camshaft Drive Chain Timing Link for the Right Primary Camshaft Intermediate Drive Chain Sprocket
(17)Right Primary Camshaft Intermediate Drive Chain Sprocket Timing Mark for the Primary Camshaft Drive Chain
(18)Right Primary Camshaft Intermediate Drive Chain Sprocket Timing Mark/Window for the Right Secondary Camshaft Timing Drive Chain
(19)Right Secondary Camshaft Timing Drive Chain Timing Link for the Right Primary Camshaft Intermediate Drive Chain Sprocket
(20)Right Secondary Camshaft Timing Drive Chain
(21)Right Exhaust Secondary Camshaft Timing Drive Chain Timing Link
(22)Right Exhaust Camshaft Position (CMP) Actuator Timing Mark
(23)Right Intake Camshaft Position (CMP) Actuator Timing Mark
(24)Right Intake Secondary Camshaft Timing Drive Chain Timing Link
Figure 3:

Stage One


Object Number: 1961823  Size: LF
(1)Left Intake Camshaft Position (CMP) Actuator Timing Mark
(2)Left Intake Secondary Camshaft Timing Drive Chain Timing Link
(3)Left Exhaust Camshaft Sprocket Timing Mark
(4)Left Exhaust Secondary Camshaft Timing Drive Chain Timing Link
(5)Left Secondary Camshaft Timing Drive Chain
(6)Primary Camshaft Drive Chain Timing Link for the Left Primary Camshaft Intermediate Drive Chain Sprocket
(7)Left Primary Camshaft Intermediate Drive Chain Sprocket Timing Mark for the Primary Camshaft Drive Chain
(8)Left Primary Camshaft Intermediate Drive Chain Sprocket
(9)Left Secondary Camshaft Timing Drive Chain Timing Link for the Left Primary Camshaft Intermediate Drive Chain Sprocket
(10)Left Primary Camshaft Intermediate Drive Chain Sprocket Timing Window for the Left Secondary Camshaft Timing Drive Chain Timing Link
(11)Primary Camshaft Drive Chain
(12)Primary Camshaft Drive Chain Timing Link for the Crankshaft Sprocket
(13)Crankshaft Sprocket Timing Mark
(14)Crankshaft Sprocket
(15)Right Primary Camshaft Intermediate Drive Chain Sprocket
(16)Primary Camshaft Drive Chain Timing Link for the Right Primary Camshaft Intermediate Drive Chain Sprocket
(17)Right Primary Camshaft Intermediate Drive Chain Sprocket Timing Mark
Figure 4:

Stage Two


Object Number: 1961824  Size: LF
(1)Left Intake Camshaft Position (CMP) Actuator Timing Mark
(2)Left Intake Secondary Camshaft Timing Drive Chain Timing Link
(3)Left Exhaust Camshaft Sprocket Timing Mark
(4)Left Exhaust Secondary Camshaft Timing Drive Chain Timing Link
(5)Left Secondary Camshaft Timing Drive Chain
(6)Primary Camshaft Drive Chain Timing Link for the Left Primary Camshaft Intermediate Drive Chain Sprocket
(7)Left Primary Camshaft Intermediate Drive Chain Sprocket Timing Mark for the Primary Camshaft Drive Chain
(8)Left Primary Camshaft Intermediate Drive Chain Sprocket
(9)Left Secondary Camshaft Timing Drive Chain Timing Link for the Left Primary Camshaft Intermediate Drive Chain Sprocket
(10)Left Primary Camshaft Intermediate Drive Chain Sprocket Timing Window
(11)Primary Camshaft Drive Chain
(12)Primary Camshaft Drive Chain Timing Link for the Crankshaft Sprocket
(13)Crankshaft Sprocket Timing Mark
(14)Crankshaft Sprocket
(15)Right Primary Camshaft Intermediate Drive Chain Sprocket
(16)Primary Camshaft Drive Chain Timing Link for the Right Primary Camshaft Intermediate Drive Chain Sprocket
(17)Right Primary Camshaft Intermediate Drive Chain Sprocket Timing Mark for the Primary Camshaft Drive Chain
(18)Right Primary Camshaft Intermediate Drive Chain Sprocket Timing Mark/Window for the Right Secondary Camshaft Timing Drive Chain
(19)Right Secondary Camshaft Timing Drive Chain Timing Link for the Right Primary Camshaft Intermediate Drive Chain Sprocket
(20)Right Secondary Camshaft Timing Drive Chain
(21)Right Exhaust Secondary Camshaft Timing Drive Chain Timing Link
(22)Right Exhaust Camshaft Sprocket Timing Mark
(23)Right Intake Camshaft Position (CMP) Actuator Timing Mark
(24)Right Intake Secondary Camshaft Timing Drive Chain Timing Link