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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN K1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 542 (STEERING WHEEL AND STEERING COLUMN)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B2593TEST DESCRIPTION
2006 Chevrolet Suburban K1500, 5.3 Z

Test Description

2006 Chevrolet Suburban K1500, 5.3 ZSECTION Test Description
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

  1. 4:  When the BCM is replaced, use a scan tool to perform the BCM RPO Reprogram procedure.
DTC B2593

Step Action Yes No
Schematic Reference:  Column/Ignition Lock Schematics  
Connector End View Reference:  Steering Wheel and Column Connector End Views  
1 Did you perform the Steering Wheel and Column Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Steering Wheel and Column 
2 Test the steering column lock and steering column unlock circuits for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 5  Go to Step 3 
3 Inspect for poor connections at the harness connector of the BCM. 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 5  Go to Step 4 
4 
IMPORTANT: Perform the BCM RPO Reprogram procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
Replace the BCM. Refer to Body Control Module Replacement in Body Control System.Did you complete the replacement?		 Go to Step 5  -
5
  1. Use the scan tool in order to clear the DTCs.
  2. Clear the BCM steering column lock fail enable mode by disconnecting BCM1 & IPC fuse for 15 seconds.
  3. Operate the vehicle within the Conditions for Setting the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 2  System OK
RENDER: 1.0x

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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.