AutoCodes – GMC – B0996 GMC

B0996 GMC Code - Vehicle Electronic Control Unit VIN Check Error

Quick Answer

After battery power has been restored following a loss of power, the Theft Deterrent Module (TDM) will perform a check on the stored Vehicle Identification Number (VIN). Common causes include Vehicle Identification Number (VIN) Set Up Procedure, Faulty Theft Deterrent Module (TDM), Theft Deterrent Module (TDM) harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B0996 GMC indicates Vehicle Electronic Control Unit VIN Check Error.
Common causes: Common causes include Vehicle Identification Number (VIN) Set Up Procedure, Faulty Theft Deterrent Module (TDM), Theft Deterrent Module (TDM) harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,565

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0996 GMC Description

After battery power has been restored following a loss of power, the Theft Deterrent Module (TDM) will perform a check on the stored Vehicle Identification Number (VIN). If the VIN is CORRECT, the TDM will run the VIN Timer for a programmable length of time, typically 10 minutes. The TDM will send a message via the serial data circuit to the Instrument Panel Cluster (IPC) to illuminate the SECURITY indicator. After the VIN Timer has timed out, the security indicator will turn OFF. If the VIN is INCORRECT, the TDM will send the fuel disable password to the Engine Control Module (ECM), via the serial data circuit. The immobiliser system considers this to be an indication of tampering and will not allow the vehicle to start. The TDM will send a message via the serial data circuit to the IPC to flash the SECURITY indicator.

OBDII Code B0996 GMC - Vehicle Electronic Control Unit VIN Check Error - AutoCodes.com — B0996 GMC Code - Vehicle Electronic Control Unit VIN Check Error

What does this mean?

What are the Possible Causes of the DTC B0996 GMC?

Vehicle Identification Number (VIN) Set Up Procedure
Faulty Theft Deterrent Module (TDM)
Theft Deterrent Module (TDM) harness is open or shorted
Theft Deterrent Module (TDM) circuit poor electrical connection

How to Fix the DTC B0996 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0996 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B0996 GMC code?

Need more information on how to fix the B0996 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B0996 GMC Code

1. What are common symptoms of OBDII code B0996 GMC?

Common symptoms include the check engine light turning on, issues with vehicle starting, and problems with the electronic control unit (ECU) VIN check process.

2. What can cause the OBDII code B0996 GMC to appear?

The code B0996 typically indicates an error during the ECU VIN check process, which can be caused by issues with the vehicle's ECU, wiring, or software.

3. How can I diagnose the OBDII code B0996 GMC?

Diagnosing this code usually involves using a diagnostic scanner to read the code, checking the ECU for any visible damage, and inspecting the wiring connected to the ECU.

4. What are some possible repair tips for OBDII code B0996 GMC?

Repair tips may include resetting the ECU, checking and repairing any damaged wiring, updating the ECU software, or replacing the ECU if necessary.

5. Can I drive my vehicle with the OBDII code B0996 GMC present?

It is not recommended to drive the vehicle with this code present, as it may indicate underlying issues that could affect the vehicle's performance and safety.

6. How much does it typically cost to repair OBDII code B0996 GMC?

The cost of repairs for this code can vary depending on the underlying issue, but it is advisable to consult with a professional mechanic for an accurate estimate.

7. Is it possible to clear the OBDII code B0996 GMC without fixing the underlying issue?

Clearing the code without addressing the underlying problem may temporarily turn off the check engine light, but the issue will likely reappear until properly repaired.

8. Can a DIY enthusiast fix the OBDII code B0996 GMC?

While some simple repairs like checking wiring connections can be done by DIY enthusiasts, diagnosing and repairing complex issues related to this code may require professional help.

9. How long does it take to repair OBDII code B0996 GMC?

The repair time can vary depending on the specific issue causing the code, but it is best to consult with a mechanic to get an accurate estimate of the repair duration.

10. Are there any recalls or technical service bulletins related to OBDII code B0996 GMC?

It is recommended to check with the vehicle manufacturer or a dealership for any relevant recalls or technical service bulletins related to this specific OBDII code to see if there are known issues or solutions available.