Fig 1: Identifying Steering Column Components

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Turn Signal/Multifunction Switch C3
2	C279 Inflatable Restraint Steering Wheel Module Coil to Steering Wheel Harness
3	Inflatable Restraint Steering Wheel Module Coil C1 Connector
4	Inflatable Restraint Steering Wheel Module Coil C2 Connector
5	Turn Signal/Multifunction Switch C2
6	Turn Signal/Multifunction Switch C1
7	Rear Wiper/Washer Switch
8	Turn Signal/Multifunction Switch
9	Turn Signal/Multifunction Switch C4
10	S277 and S279
11	C277 Inflatable Restraint Steering Wheel Module Coil to Steering Column Harness
12	C275 Inflatable Restraint Steering Wheel Module Coil to Body Harness
13	C201 Steering Column Harness to I/P Harness
14	Steering Wheel Speed Position Sensor (JL4)
15	Theft Deterrent Exciter Module Connector (Pigtail)
16	Inflatable Restraint Steering Wheel Module Coil
17	Theft Deterrent Exciter Module
18	Ignition Switch
19	A/T Shift Lock Control Solenoid Connector

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Automatic Transmission Shift Lock Control Component Views