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

Engine Components - Front View


Object Number: 1336160  Size: LF
(1)Intake Air Temperature (IAT) Sensor 2 (Sensor 1 in the Air Cleaner Housing)
(2)Manifold Absolute Pressure (MAP) Sensor
(3)Throttle Actuator Control (TAC) Module
(4)Engine Coolant Temperature (ECT) Sensor
(5)Exhaust Gas Recirculation (EGR) Valve
(6)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
(7)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
(8)Ignition Control Modules (ICM) 4, 5, and 6
(9)Knock Sensor (KS)
Figure 2:

Engine Components - Rear View


Object Number: 1336164  Size: LF
(1)Camshaft Position (CMP) Sensor
(2)Crankshaft Position (CKP) Sensor
(3)Rocker Arm Oil Control Solenoid
(4)Rocker Arm Oil Pressure Switch
(5)Engine Oil Pressure (EOP) Switch
(6)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
(7)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
(8)Ignition Control Modules (ICM) 1, 2, and 3
(9)Splice Pack SP113
(10)Splice Pack SP114
(11)Evaporative (EVAP) Emissions Purge Control Solenoid Valve