B0688 GMC - Security System Indicator Circuit High

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

B0688 GMC Possible Causes

  • Faulty Instrument Panel Cluster (IPC)
  • Instrument Panel Cluster (IPC) harness is open or shorted
  • Instrument Panel Cluster (IPC) circuit poor electrical connection
  • Faulty Body Control Module (BCM)

First diagnose B0688 GMC code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the B0688 GMC code

    Labor: 1.0

    The cost of diagnosing the B0688 GMC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

B0688 GMC Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B0688 GMC Meaning

The security indicator is controlled by the Body Control Module (BCM) based on commands from the immobilizer system or the Content Theft Deterrent (CTD) system. With the ignition OFF, the security indicator is commanded by the CTD system. With the ignition ON, the security indicator is commanded by the immobilizer system. The security indicator is located in the Instrument Panel Cluster (IPC) and is supplied B+ at all times. When the immobilizer or CTD system requests the indicator be commanded ON, the BCM grounds the security indicator control circuit, illuminating the indicator.
OBDII Code B0688 GMC - Security System Indicator Circuit High - Engine-Codes.com

B0688 GMC More Information

Need more information on how to fix the B0688 GMC code?
Get Access to Factory Service Manuals

Related Information