GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

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?

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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

  1. Disconnect the RH steering wheel controls.
  2. Press and hold the steering wheel control select down switch.
  3. Measure the resistance between the RH steering wheel controls feed circuit and the RH steering wheel controls return circuit.

Is the resistance within the specified range?

2148ohms-2625ohms

Go to Step  5

Go to Step  9

5

Test the steering wheel controls feed 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 steering wheel control return 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 Switch Assembly Replacement in Steering Wheel and Column - Tilt.

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 in Body Controls.

Did you complete the replacement?

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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