GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Schematic Reference: Steering Wheel Controls Schematics

1

Did you perform the Radio/Audio System Diagnostic System Check?

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Go to Step  2

Go to Diagnostic System Check - Radio/Audio System

2

  1. Turn ON the ignition, with the engine OFF.
  2. Turn ON the radio.
  3. Operate all of the steering wheel controls.

Do all of the steering wheel controls operate properly?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step  3

3

Do one or more of the steering wheel control switches operate properly?

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Go to Step  8

Go to Step 4

4

Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.

  1. Disconnect the steering wheel controls.
  2. Press and hold the steering wheel control select down switch.
  3. Measure the resistance between the remote radio control supply voltage circuit and the remote radio control signal circuit.

Is the resistance within the specified range?

2148 ohms-2625 ohms

Go to Step  5

Go to Step  9

5

Test the remote radio control supply voltage circuit for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step  11

Go to Step  6

6

Test the remote radio control signal circuit for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step  11

Go to Step  7

7

Inspect for poor connections at the harness connector of the DIM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step  11

Go to Step  10

8

Inspect for poor connections at the harness connector of the steering wheel controls. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step  11

Go to Step  9

9

Replace the steering wheel control. Refer to Steering Wheel Control Switches Replacement .

Did you complete the replacement?

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Go to Step  11

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10

Replace the DIM. Refer to Dash Integration Module Replacement .

Did you complete the replacement?

--

Go to Step  11

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11

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step  2