GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

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. Make sure the vehicle is outside in an area with an unobstructed view of the southern sky.
  2. Turn ON the ignition, with the engine OFF.
  3. Turn ON the radio.
  4. Tune the radio to satellite channel 1.

Is the reception clear?

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Go to Step 3

Go to Step 5

3

Tune the radio to several other satellite channels.

Is the reception clear?

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Go to Audio System Troubleshooting Hints

Go to Step 4

4

Contact XM at 1-800-852-9696 to verify customer account status or possible network problems.

Did you find and correct the condition?

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Go to Step 15

Go to Step 10

5

Contact XM at 1-800-852-9696 to verify possible network problems.

Did you find and correct the condition?

--

Go to Step 15

Go to Step 6

6

Important: A design change took place that changed the resistance of the antenna. All service stock uses the second design.

Was the vehicle built before February 7, 2002?

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Go to Step 7

Go to Step 8

7

  1. Disconnect the antenna cable from the digital radio receiver.
  2. Measure the resistance from the center conductor of one antenna cable to the center conductor of the other antenna cable.

Does the resistance measure within the specified value?

190-210ohms

Go to Step 10

Go to Step 9

8

  1. Disconnect the antenna cable from the digital radio receiver.
  2. Measure the resistance from the center conductor of one antenna cable to the center conductor of the other antenna cable.

Does the resistance measure within the specified value?

9k 11k ohms

Go to Step 10

Go to Step 9

9

Test the antenna cables for an open, short, or high resistance. Refer to Circuit Testing in Wiring Systems.

Did you find the condition?

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Go to Step 12

Go to Step 11

10

Inspect for poor connections at the digital radio receiver. 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 15

Go to Step 13

11

Inspect for poor connections at the digital radio antenna. 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 15

Go to Step 14

12

Replace the digital radio antenna cable. Refer to Digital Radio Antenna Cable Replacement .

Did you complete the replacement?

--

Go to Step 15

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13

Important: Always perform the setup procedure for the digital radio receiver.

Replace the digital radio receiver. Refer to Digital Radio Receiver Replacement .

Did you complete the replacement?

--

Go to Step 15

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14

Replace the digital radio antenna. Refer to Digital Radio Antenna Replacement .

Did you complete the replacement?

--

Go to Step 15

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15

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2