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Engine-Codes – GMC – B2545 2016 GMC Sierra

B2545 2016 GMC Sierra Code - Backup Lamps Circuit

Quick Answer

The B2545 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Backup Lamps Circuit. Common causes include Faulty backup lamp switch, Damaged wiring or connectors in the backup lamp circuit, Blown fuse related to the backup lamps. 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
B2545 2016 GMC Sierra indicates Backup Lamps Circuit.
Common causes
Common causes include Faulty backup lamp switch, Damaged wiring or connectors in the backup lamp circuit, Blown fuse related to the backup lamps.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code B2545 2016 GMC Sierra Description

The B2545 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Backup Lamps Circuit. This code indicates a malfunction in the circuit responsible for controlling the backup lamps, which are essential for providing visibility when the vehicle is in reverse. The backup lamps are an important safety feature, as they alert other drivers and pedestrians of the vehicle's intention to reverse, reducing the risk of accidents.

OBDII Code B2545 2016 GMC Sierra - Backup Lamps Circuit
B2545 2016 GMC Sierra Code - Backup Lamps Circuit

Common Causes of B2545 2016 GMC Sierra

  1. Faulty backup lamp switch.
  2. Damaged wiring or connectors in the backup lamp circuit.
  3. Blown fuse related to the backup lamps.
  4. Malfunctioning PCM.
  5. Corrosion or poor connections in the backup lamp circuit.

Symptoms of B2545 2016 GMC Sierra

  1. Backup lamps not illuminating when the vehicle is in reverse.
  2. Dashboard warning light indicating an issue with the backup lamps.
  3. Flickering or dim backup lamps.
  4. Backup lamps staying on constantly, even when the vehicle is not in reverse.
  5. Inconsistent operation of the backup lamps.

How to Fix B2545 2016 GMC Sierra

  1. Use a scan tool to retrieve the specific DTC and diagnose the issue.
  2. Inspect the backup lamp switch, wiring, and fuse for any signs of damage.
  3. Replace any faulty components, such as the backup lamp switch or damaged wiring.
  4. Clear the DTC from the PCM's memory and perform a test to ensure the backup lamps are functioning properly.
  5. If necessary, reprogram the PCM to ensure proper communication with the backup lamp circuit.

Cost to Fix B2545 2016 GMC Sierra

The typical repair costs for addressing the B2545 code on a 2016 GMC Sierra can range from $100 to $300, depending on the specific cause of the issue and the cost of replacement parts. This estimate includes both parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle.

What does this mean?

Tech Notes for B2545 2016 GMC Sierra

B2545:01 Backup Lamps Circuit Short to Battery

B2545:02 Backup Lamps Circuit Short to Ground

B2545:02 Backup Lamps Circuit Open

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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 B2545 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code B2545 in a 2016 GMC Sierra related to the Backup Lamps Circuit?

The common symptoms include non-functioning backup lights, intermittent operation of the backup lights, or the backup lights staying on constantly.

2. What are the possible causes of OBDII code B2545 in a 2016 GMC Sierra?

Possible causes include a faulty backup lamp switch, damaged wiring or connectors in the backup lamp circuit, a blown fuse, or a malfunctioning body control module.

3. How can I diagnose the issue causing OBDII code B2545 in my 2016 GMC Sierra?

You can start by checking the fuse for the backup lamp circuit, inspecting the wiring and connectors for any damage, testing the backup lamp switch for proper operation, and using a diagnostic scanner to retrieve trouble codes from the body control module.

4. Can I repair OBDII code B2545 in my 2016 GMC Sierra myself?

Depending on your skill level and access to tools, you may be able to repair the issue yourself by replacing the faulty backup lamp switch, repairing damaged wiring or connectors, or resetting the body control module. However, if you are unsure, it is recommended to consult a professional mechanic.

5. Is it safe to continue driving my 2016 GMC Sierra with OBDII code B2545 triggered?

It is not recommended to drive your vehicle with OBDII code B2545 active, as non-functioning backup lights can pose a safety hazard, especially when reversing in low-light conditions. It is best to address the issue promptly.

6. Will resetting the OBDII code B2545 in my 2016 GMC Sierra make the problem go away?

Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying issue causing OBDII code B2545. It is important to diagnose and repair the problem to prevent the code from reoccurring.

7. How much does it typically cost to repair OBDII code B2545 in a 2016 GMC Sierra at a dealership or repair shop?

The cost of repairing OBDII code B2545 can vary depending on the exact cause of the issue and the labor rates of the dealership or repair shop. It is advisable to get a diagnosis and cost estimate before proceeding with the repair.

8. Can extreme weather conditions affect the Backup Lamps Circuit and trigger OBDII code B2545 in a 2016 GMC Sierra?

Yes, extreme weather conditions such as moisture, corrosion, or temperature fluctuations can potentially damage the wiring or connectors in the Backup Lamps Circuit, leading to the triggering of OBDII code B2545.

9. Are there any preventive maintenance tips to avoid encountering OBDII code B2545 in a 2016 GMC Sierra?

Regularly inspecting the backup lights for proper operation, checking the fuse for the backup lamp circuit, and keeping the wiring and connectors clean and free of corrosion can help prevent issues that may trigger OBDII code B2545.

10. Can a dashboard warning light be illuminated due to OBDII code B2545 in a 2016 GMC Sierra?

Yes, OBDII code B2545 can trigger the check engine light or a specific warning light related to the backup lamps circuit on the dashboard of a 2016 GMC Sierra, indicating a malfunction that needs to be addressed.

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