GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 TrailBlazer - 4WD 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Instrument Panel/Center Console Component Views
Figure 1:

Behind the Center of the I/P Components (Z88/Z89)
Object Number: 1707997 Size: MF
(1)Rear Window Wiper/Washer Switch
(2)Auxiliary Power Outlet - Front
(3)Cigar Lighter
(4)Transfer Case Shift Control Switch (NP8)
(5)Instrument Panel Harness
Figure 2:

Behind the Center of the I/P Components (X88)
Object Number: 1489005 Size: MF
(1)Rear Window Wiper/Washer Switch
(2)Transfer Case Shift Control Switch (NP8)
(3)Instrument Panel Harness
(4)Auxiliary Power Outlet - Front
(5)Cigar Lighter
Figure 3:

Below the Left Side of the I/P Components
Object Number: 1488411 Size: MF
(1)Turn Signal/Hazard Flasher Module
(2)Instrument Panel Harness
(3)Data Link Connector (DLC)
(4)Splice Pack JX205
Figure 4:

Below the Center of the I/P Components
Object Number: 1657302 Size: MF
(1)Rear Blower Motor
(2)X204
(3)Rear Blower Resistor
Figure 5:

Below the Right Side of the I/P Components
Object Number: 1551058 Size: MF
(1)Digital Radio Receiver (U2K)
Figure 6:

Front of the I/P Components
Object Number: 749891 Size: MF
(1)Speedometer
(2)Engine Oil Pressure Gage
(3)Voltmeter
(4)Coolant Temperature Gage
(5)Fuel Gage
(6)Tachometer
Figure 7:

Steering Column Components
Object Number: 1379735 Size: MF
(1)Hazard Switch
(2)X277
(3)Inflatable Restraint Steering Wheel Module Connector X1
(4)Inflatable Restraint Steering Wheel Module Connector X2
(5)Electronic Adjustable Pedals (EAP) Switch
(6)Turn Signal/Multifunction Switch
(7)X201
(8)X275
Figure 8:

Steering Wheel Components
Object Number: 856748 Size: LF
(1)Steering Wheel Control Switch Assembly - Upper Left (STW)
(2)Passlock Sensor Connector (w/o BAE)
(3)Ignition Key Alarm Switch
(4)Ignition Lock Cylinder Control Actuator
(5)Ignition Lock Cylinder Control Actuator Connector
(6)Ignition Switch
(7)Ignition Key Cylinder
(8)Steering Wheel Control Switch Assembly - Upper Right (STW)
(9)Horn Switch
(10)Steering Wheel Control Switch Assembly - Lower Right (STW)
(11)X277
(12)Steering Wheel Control Switch Assembly - Lower Left (STW)
(13)Turn Signal/Multifunction Switch