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

IP, Center View


Object Number: 230778  Size: LF
(1)Hourmeter
(2)Air Brake Pressure Gauge Lamp
(3)Air Brake Pressure Gage
(4)Ammeter
(5)Multifunction Alarm Module (MFAM) C2 (4 cavities)
(6)Hazard Warning Switch Indicator Lamp (part of the hazard warning lamps name plate)
(7)Right IP Trim Bezel
(8)Hazard Warning Switch
(9)Center IP Trim Bezel
(10)Automatic Transmission (A/T) Selector Control
(11)Left IP Trim Bezel
(12)Low Air Pressure Switch
Figure 2:

Manual Transmission Harness, Left Forward View


Object Number: 228367  Size: LF
(1)Backup Lamps Switch
(2)Vehicle Speed Sensor (VSS) (JE4)
(3)Vehicle Speed Sensor (VSS) (JE3)
Figure 3:

Left Side of IP Harness


Object Number: 230785  Size: LF
(1)Daytime Running Lamp (DRL) Control Module
Figure 4:

IP Harness to Dash Panel, Right Forward


Object Number: 230863  Size: LF
(1)Relay Center
(2)Vehicle Speed Sensor (VSS) Buffer
(3)Fuse Block 2
(4)Fuse Block 1
(5)IP Fuse Block/Mini-Relay Center
(6)Flasher/Relay Center, Position 3
(7)Flasher/Relay Center, Position 2, Exhaust Brake Relay
(8)Flasher/Relay Center
(9)Flasher/Relay Center, Position 1
Figure 5:

Forward Lamps, Left Front View


Object Number: 228253  Size: LF
(1)Front Left Park and Turn Signal Lamp (Right Side Similar)
(2)Left High/Low Beam Headlamp (Right Side Similar)
(3)Engine Harness
(4)Forward Lamp Harness
Figure 6:

Steering Column, Left Forward View


Object Number: 227483  Size: LF
(1)Ignition Switch
(2)Headlamps Dimmer Switch
Figure 7:

Left Side of IP (Components), Forward


Object Number: 220291  Size: MF
(1)IP Lamps Dimmer Switch
(2)Instrument Cluster
(3)Exhaust Brake Clutch Switch Jumper Plug
(4)Exhaust Brake Clutch Switch
(5)Upfitter Connector (23 cavities)
(6)Upfitter Connector Jumper (23 cavities)
(7)Upfitter IP (+) Junction Block
(8)Daytime Running Lamp (DRL) Control Module
(9)Driver Information Center
(10)Headlamps Switch
Figure 8:

IP Harness to Dash Panel, Center Forward View


Object Number: 228594  Size: LF
(1)Stoplamps Switch (ABS-Hydraulic)
Figure 9:

IP Harness to Dash Panel (JE5 Shown, JE3 Similar), Center Front View


Object Number: 216172  Size: LF
(1)Hourmeter
(2)Automatic Transmission (A/T) Selector Connector (I/P Mounted)
(3)Turn Signal Switch
(4)Low Air Pressure Switch
(5)Ignition Switch C1 (5 cavities)
(6)Ignitions Switch C2 (4 cavities)
(7)Stoplamps Switch C1 (4 cavities)