LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 956 (Entertainment System) >> Diagnostic Information and Procedures >> Radio Displays LOC, LOCKED, or CODE

Radio Displays LOC, LOCKED, or CODE

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.
Radio Displays LOC, LOCKED, or CODE

Step Action 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 Diagnostics System Check-Entertainment System? Go to Step 2  Go toDiagnostic System Check - Entertainment System 
2
  1. Turn ON the ignition, with the engine OFF.
  2. Turn ON the radio.
Does the radio operate normally?		 Go toTesting for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3
  1. Program the radio. Refer to Service Programming System (SPS) in Programming.
  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
IMPORTANT: Reprogram the radio. Refer to Service Programming System (SPS) in Programming.
Replace the radio. Refer toRadio Replacement .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 
scientia non olet · About LEMON Manuals