B3033 GMC Code - Security System Indicates Tamper
Quick Answer
The Passlockâ„¢ system is provided in order to prevent vehicle theft if the ignition lock cylinder is forced to rotate or the ignition switch is operated while separated from the ignition lock cylinder case. Common causes include Faulty Passlockâ„¢ Sensor, Passlockâ„¢ Sensor harness is open or shorted, Passlockâ„¢ Sensor circuit poor electrical connection. 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
- B3033 GMC indicates Security System Indicates Tamper.
- Common causes
- Common causes include Faulty Passlockâ„¢ Sensor, Passlockâ„¢ Sensor harness is open or shorted, Passlockâ„¢ Sensor circuit poor electrical connection.
- 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.
Code B3033 GMC Description
When the correct key is used to start the vehicle, a magnet on the lock cylinder passes close to the Passlockâ„¢ sensor within the ignition lock cylinder case. The magnet activates the security hall effect sensor in the Passlockâ„¢ sensor which completes a circuit from the security sensor signal circuit through a resistor to the security sensor low reference circuit. The resistance value will vary from vehicle to vehicle. The BCM will measure the voltage on the security sensor signal circuit and compare this voltage to a previously learned voltage. If the voltage measured is within the valid range, the BCM will send a class 2 message to the Powertrain Control Module (PCM) to enable vehicle starting. If the voltage measured is not within the valid range, a class 2 message will be sent to the PCM to disable starting of the vehicle.
What are the Possible Causes of the DTC B3033 GMC?
- Faulty Passlockâ„¢ Sensor
- Passlockâ„¢ Sensor harness is open or shorted
- Passlockâ„¢ Sensor circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3033 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 B3033 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 B3033 GMC code?
Need more information on how to fix the B3033 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B3033 GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B3033 GMC Code
1. What are the common symptoms of OBDII code B3033 GMC (Security System Indicates Tamper)?
- The common symptoms include the security system light staying on, the vehicle not starting, and the security system activating unexpectedly.
2. What can cause the OBDII code B3033 GMC to trigger?
- This code can be triggered by tampering with the security system components, such as the ignition key or key cylinder.
3. How can I diagnose the OBDII code B3033 GMC?
- A thorough inspection of the security system components, such as the key cylinder, ignition key, and wiring, is necessary to diagnose this code.
4. Can a DIY enthusiast repair the OBDII code B3033 GMC?
- Repairing this code may require advanced knowledge of vehicle security systems, so it is recommended to consult a professional mechanic.
5. Are there any quick tips to troubleshoot the OBDII code B3033 GMC?
- Checking the condition of the ignition key, ensuring it is the correct key for the vehicle, and verifying the wiring connections related to the security system can help troubleshoot this code.
6. Is it safe to drive with the OBDII code B3033 GMC active?
- It is not recommended to drive with this code active, as it can lead to security system malfunctions that may affect the vehicle's operation.
7. How can I reset the OBDII code B3033 GMC?
- Resetting this code may require fixing the underlying security system issue and using a diagnostic tool to clear the code from the vehicle's computer.
8. Can extreme weather conditions cause the OBDII code B3033 GMC to appear?
- Extreme weather conditions can sometimes affect the security system components, potentially triggering this code.
9. What are the long-term effects of ignoring the OBDII code B3033 GMC?
- Ignoring this code can lead to persistent security system issues, potential immobilization of the vehicle, and compromised safety features.
10. Are there any recalls or technical service bulletins related to the OBDII code B3033 GMC?
- It is recommended to check with the vehicle manufacturer or authorized service centers for any recalls or technical service bulletins related to this code.
Discuss the causes and fixes for B3033 GMC OBDII Code
Code B3033 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
