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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 905 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESRADIO DISPLAYS LOC, LOCKED, OR CODE
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2

Radio Displays LOC, LOCKED, or CODE

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Radio Displays LOC, LOCKED, or CODE
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2007 GMC Savana Special, 2007 GMC Savana Camper Special, 2007 GMC Savana, 2007 Chevrolet RV Cutaway, and 2007 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Radio Displays LOC, LOCKED, or CODE

Step Action Yes No
Schematic Reference: Radio/Navigation System Schematics 
Connector End View Reference: Entertainment/Communication Connector End Views 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Turn ON the ignition, with the engine OFF.
  2. Turn ON the radio.
Does the radio operate normally?		 Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
3
  1. Reprogram the radio. Refer to Control Module References .
  2. Turn OFF the ignition.
  3. Turn ON the ignition, with the engine OFF.
  4. Turn ON the radio.
Does the radio display LOCKED?		 Go to Step 4  Go to Step 5 
4 Replace the radio. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 Go to Step 5  -
5 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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.