B3135 GMC Code - All Doors Lock Circuit
Quick Answer
The Body Control Module (BCM) supplies a 12-volt signal to the lock and unlock signal circuits of the driver and passenger door lock switches. Common causes include Faulty Door Latch Assembly, Door Latch Assembly harness is open or shorted, Door Latch Assembly 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
- B3135 GMC indicates All Doors Lock Circuit.
- Common causes
- Common causes include Faulty Door Latch Assembly, Door Latch Assembly harness is open or shorted, Door Latch Assembly 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 B3135 GMC Description
The BCM, upon receipt of a lock switch lock or unlock signal, will supply voltage to the door lock actuator lock or unlock control circuits. Since the opposite side of the lock actuator is connected to the ground through the other lock actuator control circuit, the doors will then lock or unlock as commanded. The Diagnostic Trouble Code (DTC) sets when the BCM detects a short to ground or open/high resistance on a door latch control circuit.
What are the Possible Causes of the DTC B3135 GMC?
- Faulty Door Latch Assembly
- Door Latch Assembly harness is open or shorted
- Door Latch Assembly circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3135 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 B3135 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.
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Information for Specific GMC Models
- B3135 2014 GMC Sierra — All Doors Lock Circuit
- B3135 2015 GMC Sierra — All Doors Lock Circuit
- B3135 2016 GMC Sierra — All Doors Lock Circuit
- B3135 2017 GMC Sierra — All Doors Lock Circuit
- B3135 2018 GMC Sierra — All Doors Lock Circuit
Frequently Asked Questions about B3135 GMC Code
1. What are the common symptoms of OBDII code B3135 GMC (All Doors Lock Circuit)?
- Common symptoms include difficulty locking or unlocking all doors, unresponsive door locks, or the doors locking/unlocking on their own.
2. What are the possible causes of OBDII code B3135 GMC (All Doors Lock Circuit)?
- Possible causes include faulty door lock actuators, damaged wiring or connectors, a defective body control module (BCM), or issues with the door lock switch.
3. How can I diagnose the issue related to OBDII code B3135 GMC (All Doors Lock Circuit)?
- Use a diagnostic scanner to read the code and perform a visual inspection of the door lock components, wiring, and connectors. Test the door lock actuators and switches for proper functionality.
4. Can I repair OBDII code B3135 GMC (All Doors Lock Circuit) myself?
- Depending on your skill level, you may be able to repair this issue yourself by replacing faulty door lock actuators, repairing damaged wiring, or resetting the BCM. However, professional help may be needed for more complex issues.
5. Is it safe to continue driving with OBDII code B3135 GMC (All Doors Lock Circuit) present?
- While the vehicle may still be operable with this code, it is not recommended to ignore it as it can lead to potential safety issues if the doors do not lock or unlock properly.
6. How much does it typically cost to repair OBDII code B3135 GMC (All Doors Lock Circuit)?
- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.
7. Will resetting the OBDII code B3135 GMC (All Doors Lock Circuit) resolve the issue?
- Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the code to trigger. Proper diagnosis and repair are necessary.
8. Can extreme weather conditions affect OBDII code B3135 GMC (All Doors Lock Circuit)?
- Yes, extreme heat or cold can sometimes exacerbate issues related to door lock components, wiring, or connectors, leading to the triggering of this code.
9. Are there any preventive maintenance tips to avoid OBDII code B3135 GMC (All Doors Lock Circuit)?
- Regularly lubricating door lock mechanisms, checking for loose wiring, and addressing any door lock issues promptly can help prevent the occurrence of this code.
10. How long does it typically take to repair OBDII code B3135 GMC (All Doors Lock Circuit)?
- The repair time can vary depending on the specific cause of the issue and the complexity of the repair, but it may take anywhere from 1 to 4 hours in most cases.
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