GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

Schematic Reference: Radio/Audio System Schematics

Connector End View Reference: Entertainment Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

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Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

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?

--

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 1-800-556-3600 to verify customer account status or possible network problems.

Did you find and correct the condition?

--

Go to Step 14

Go to Step 10

5

Contact XM at 1-800-556-3600 to verify possible network problems.

Did you find and correct the condition?

--

Go to Step 14

Go to Step 6

6

With a scan tool, observe the digital radio antenna in the digital radio receiver data list.

Does the scan tool indicate that the digital radio antenna is within the specified range?

1200-1800 mV or 42-118 mA

Go to Step 10

Go to Step 7

7

  1. Disconnect the antenna cables from the digital radio receiver.
  2. Measure the voltage from the center conductor of the inboard antenna connector on the digital radio receiver to one of the case screws.

Does the voltage measure within the specified range?

4.5-5.5 V

Go to Step 8

Go to Step 10

8

Test the antenna cables for an open, short, or high resistance. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find the condition?

--

Go to Step 9

Go to Step 11

9

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

Did you complete the replacement?

--

Go to Step 14

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10

Inspect for poor connections at the digital radio receiver. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 14

Go to Step 12

11

Inspect for poor connections at the digital radio antenna. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 14

Go to Step 13

12

Replace the digital radio receiver. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 14

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13

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

Did you complete the replacement?

--

Go to Step 14

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14

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2