Digital Radio Poor or No Reception

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Values	Yes	No
1	Did you perform the Diagnostic System Check - Entertainment System?	-	Go to Step 2	Go to Diagnostic System Check - Entertainment System
2	Make sure the vehicle is outside in an area with an unobstructed view of the southern sky. Turn ON the ignition, with the engine OFF. Turn ON the radio. 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?	-	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?	17-63 mA	Go to Step 10	Go to Step 7
7	Disconnect the antenna cable from the digital radio receiver. Measure the voltage from the center conductor of the 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 cable 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. Did you complete the replacement?	-	Go to Step 14	-
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	IMPORTANT: Always perform the setup procedure for the digital radio receiver. Refer to Digital Radio Receiver Setup . Replace the digital radio receiver. Refer to Receiver Replacement - Digital Radio .Did you complete the replacement?	-	Go to Step 14	-
13	Replace the digital radio antenna. Refer to Antenna Replacement - Digital Radio . Did you complete the replacement?	-	Go to Step 14	-
14	Operate the system in order to verify the repair. Did you correct the condition?	-	System OK	Go to Step 2