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

Full Engine View Left Side--4.8L, 5.3L, 6.0L


Object Number: 334934  Size: LF
(1)Manifold Absolute Pressure (MAP) sensor
(2)Fuel Pressure Regulator
(3)Positive Crankcase Ventilation (PCV) Valve
(4)Left Bank Ignition Coils
(5)Engine Oil Pressure (EOP) Sensor
(6)Engine Coolant Temperature (ECT) Sensor
(7)Throttle Position (TP) Sensor
(8)Throttle Body
(9)Idle Air Control (IAC) Valve
(10)Evaporative Emission (EVAP) Canister Purge Solenoid
Figure 2:

Engine View-Upper Right--8.1L


Object Number: 656520  Size: MF
(1)Engine Harness
(2)Manifold Absolute Pressure (MAP) Sensor Connector
(3)Engine
(4)Engine Coil Harness Connector
(5)Engine Coil Connector
(6)Engine Coolant Temperature (ECT) Sensor Connector
Figure 3:

Engine Coolant Temperature (ECT) Sensor 4.3L


Object Number: 235186  Size: MF
(1)Bank 1 Cylinder Head
(2)Engine Coolant Temperature (ECT) Sensor
Figure 4:

Engine Compartment


Object Number: 1576564  Size: LF
(1)Fuse Block - Underhood
(2)Battery Positive Voltage Terminal
(3)C180 Forward Lamp Harness to I/P Harness
(4)C104 Forward Lamp Harness to I/P Harness
(5)S166
(6)Cooling Fan - Left
(7)Cooling Fan - Right
(8)Forward Lamp Harness
(9)Fuse Block - Underhood Cooling Fan