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Conditions for Clearing the DTC

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.

The condition must be corrected.

DTC B1259

Step Action Values Yes No
Schematic Reference:  Radio/Audio System Schematics (Base/Uplevel Radio - UQ3/UQ5)  Radio/Audio System Schematics (Premium Radio - UQ7 w/o Y91)  Radio/Audio System Schematics (Luxury Radio - UQ7 w/Y91)  
1 Did you perform the Diagnostic System Check - Entertainment System? - Go to Step 2  Go to Diagnostic System Check - Entertainment System 
2 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 6  Go to Step 3 
3
  1. Disconnect the antenna cable from the digital radio receiver.
  2. 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 4  Go to Step 6 
4 Test the antenna cable for an open, short, or high resistance. Refer to Circuit Testing in Wiring Systems.
Did you find the condition?		 - Go to Step 5  Go to Step 8 
5 Replace the antenna cable. Refer to Coaxial Cable Replacement - Digital Radio (Extension) Coaxial Cable Replacement - Digital Radio (Primary) .
Did you complete the replacement?		 - Go to Step 10  -
6 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 10  Go to Step 7 
7
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 10  -
8 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 10  Go to Step 9 
9 Replace the digital radio antenna. Refer to Antenna Replacement - Digital Radio .
Did you complete the replacement?		 - Go to Step 10  -
10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 2  System OK
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