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 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?

--

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 16

Go to Step 12

5

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

Did you find and correct the condition?

--

Go to Step 16

Go to Step 6

6

Does the digital radio receiver have 2 antenna cables?

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Go to Step 7

Go to Step 8

7

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 12

Go to Step 9

8

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?

17-63 mA

Go to Step 12

Go to Step 9

9

  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 10

Go to Step 12

10

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 11

Go to Step 13

11

Replace the antenna cable.

Did you complete the replacement?

--

Go to Step 16

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12

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 16

Go to Step 14

13

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 16

Go to Step 15

14

Important: Always perform the setup procedure for the digital radio receiver. Refer to Digital Radio Receiver Setup .

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

Did you complete the replacement?

--

Go to Step 16

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15

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

Did you complete the replacement?

--

Go to Step 16

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16

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2