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

Left Side of the Engine Compartment


Object Number: 1714226  Size: LF
(1)Windshield Wiper Motor
(2)Power Brake Booster (JL4)
(3)Windshield Washer Solvent Heater (XA7)
(4)Fuse Block - Underhood
(5)Engine Control Module (ECM)
(6)Transmission Control Module (TCM) (- MYC)
(7)Brake Booster Vacuum Sensor (JL4)/Brake Master Cylinder Pressure Sensor (JL1)
(8)Brake Fluid Level Switch
Figure 2:

Front of the I/P -YE9


Object Number: 1855926  Size: LF
(1)Driver Information Center (DIC) Switch (UK3)
(2)Instrument Panel Cluster (IPC)
(3)Radio
(4)Ambient Light/Sunload Sensor Assembly (CJ2)/Ambient Light Sensor (C67/C42)
(5)HVAC Control Module
(6)Inflatable Restraint I/P Module Disable Switch (C99)
(7)Power Take-Off (PTO) Switch
(8)Auxiliary Power Outlet - Front 2
(9)I/P Multifunction Switch Assembly (JL4/JF4/UD7/XA7)
(10)Auxiliary Power Outlet - Front 1
(11)Transfer Case Shift Control Switch (NQF/NQH)
(12)Trailer Brake Control Panel Switch (JL1)
(13)Headlamp and Panel Dimmer Switch
Figure 3:

Front of the I/P +YE9


Object Number: 1909163  Size: LF
(1)Instrument Panel Cluster (IPC)
(2)Inflatable Restraint Steering Wheel Module
(3)Shift Control Lever
(4)Ambient Light/Sunload Sensor Assembly (CJ2)/Ambient Light Sensor (C67/C42)
(5)Speaker - Center (UQA +Y91)
(6)Radio
(7)Inflatable Restraint I/P Module
(8)I/P Compartment Lamp
(9)HVAC Control Module
(10)Auxiliary Power Outlet - Front 2
(11)I/P Multifunction Switch Assembly (JL4/JF4/UD7/XA7)
(12)Auxiliary Power Outlet - Front 1
(13)Driver Information Center (DIC) Switch (UK3)
(14)Steering Wheel Control Switch Assembly - Right (UK3)
(15)Steering Wheel Control Switch Assembly - Left (K34/KA9)
(16)Trailer Brake Control Panel Switch (JL1)
(17)Headlamp and Panel Dimmer Switch
(18)Dimmer Control
(19)Transfer Case Shift Control Switch (NQF/NQH)
(20)Turn Signal Multifunction Switch
Figure 4:

Left Rear Frame Rail (20/30 Series)


Object Number: 1870631  Size: LF
(1)Trailer Connector
(2)Trailer Brake Controller Module (TBCM)
(3)Trailer Brake Controller Solid State Relay
Figure 5:

Right Rear Frame Rail (31 Series)


Object Number: 1923014  Size: LF
(1)Trailer Brake Controller Solid State Relay
(2)Trailer Brake Controller Module (TBCM)