AutoCodes – Chevrolet – B2545 2017 Chevrolet Silverado

B2545 2017 Chevrolet Silverado Code - Backup Lamps Circuit

Quick Answer

The backup lamp relay is always supplied with battery voltage. Common causes include Blown Backup Lamp Fuse, Faulty Body Control Module (BCM), Body Control Module 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: B2545 2017 Chevrolet Silverado indicates Backup Lamps Circuit.
Common causes: Common causes include Blown Backup Lamp Fuse, Faulty Body Control Module (BCM), Body Control Module 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 294

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 May 24, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B2545 2017 Chevrolet Silverado Description

The backup lamp relay is always supplied with battery voltage. With the engine running and the transmission in the reverse position, the Transmission Control Module (TCM) sends a serial data message to the Body Control Module (BCM). The message indicates that the gear selector is in the reverse position. The BCM energizes the backup lamp relay by applying battery voltage to the backup lamp relay control circuit. When the backup lamp relay is energized, the relay switch contacts close, and battery voltage is applied through the backup lamp fuses to the backup lamp control circuits which illuminate the backup lamps. Once the driver moves the gear selector out of the reverse position, a message is sent by the TCM via serial data requesting the BCM to remove the battery voltage from the backup lamp relay control circuit. The engine must be running for the backup lamps to operate. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a problem with the backup lamps relay control circuit.

OBDII Code B2545 2017 Chevrolet Silverado - Backup Lamps Circuit - AutoCodes.com — B2545 2017 Chevrolet Silverado Code - Backup Lamps Circuit

What does this mean?

What are the Possible Causes of the DTC B2545 2017 Chevrolet Silverado?

Blown Backup Lamp Fuse
Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection

How to Fix the DTC B2545 2017 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

B2545:01 Backup Lamps Circuit Short to Battery
B2545:02 Backup Lamps Circuit Short to Ground
B2545:02 Backup Lamps Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2545 2017 Chevrolet Silverado 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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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 2017 Chevrolet Silverado Code

1. What does the OBDII code B2545 mean on a 2017 Chevrolet Silverado?

B2545 indicates an issue with the backup lamp circuit, typically related to a fault in the wiring, bulbs, or control module.

2. What are common symptoms of code B2545 in a 2017 Chevy Silverado?

Symptoms include backup lamps not illuminating when in reverse, warnings on the dashboard, or intermittent lighting issues.

3. What causes the B2545 code to trigger?

The code is commonly triggered by faulty backup lamp bulbs, damaged wiring, corroded connectors, or a malfunctioning body control module (BCM).

4. How can I diagnose the B2545 code?

Start by visually inspecting the backup lamp bulbs, wiring, and connectors for damage or corrosion. Use a multimeter to test circuit continuity and scan the BCM for additional codes.

5. Can a blown backup lamp bulb cause the B2545 code?

Yes, a blown or faulty bulb is a common cause of this code and should be checked first.

6. Is the B2545 code serious?

While not critical, it can be a safety concern since the backup lamps are essential for visibility when reversing.

7. How do I fix the B2545 code on a 2017 Chevrolet Silverado?

Replace any blown bulbs, repair damaged wiring, clean corroded connectors, and, if necessary, reprogram or replace the BCM.

8. Can I drive with the B2545 code active?

Yes, but itâ€™s not recommended as the backup lamps may not function properly, creating a potential safety hazard.

9. How much does it cost to fix the B2545 code?

Costs vary depending on the root cause. Bulb replacement is inexpensive, while wiring repairs or BCM replacement could be more costly, ranging from $50 to $500+.

10. Do I need special tools to repair the B2545 code?

Basic tools like a multimeter and a scan tool can help diagnose and repair the issue. Advanced repairs may require professional equipment.