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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1419 (NAVIGATION SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2462: GLOBAL POSITIONING SYSTEM (GPS) SIGNAL ERRORTEST DESCRIPTION
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Test Description

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Test Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 1:  Determines if the malfunction is present.
  2. 3:  Determines if the malfunction is due to an internal fault in the navigation radio or a GPS antenna failure.
DTC B2462

Step Action Value(s) Yes No
Schematic Reference: Navigation System Schematics 
1  Did you perform Diagnostic System Check - Navigation System  ? - Go to Step 2  Go to Diagnostic System Check - Navigation System 
2
  1. Turn OFF the ignition.
  2. Disconnect the GPS coaxial cable connector.
  3. Measure the voltage between the center conductor and the shield of the coaxial cable still attached to the navigation radio.
Is the voltage within the specified range?		 4.0-5.5 V Go to Step 5  Go to Step 3 
3  Test the GPS cable for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 7  Go to Step 4 
4 Inspect for poor connections at the harness connector of the GPS cable. 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 7  Go to Step 6 
5 Replace the GPS antenna. Refer to Antenna Replacement - Global Positioning System (GPS) (Module Assembly Radio Antenna)  .
Did you complete the replacement?		 - Go to Step 7  -
6 Replace the navigation radio. Refer to Radio Replacement in Entertainment.
Did you complete the replacement?		 - Go to Step 7  -
7
  1. Use the scan tool in order to clear the DTC.
  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
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.