B2624 GMC Code - Display Dimming Signal Circuit
Quick Answer
The Body Control Module (BCM) directly sends a reference voltage to the Instrument Panel (I/P) Dimmer Switch which is then reduced based on the I/P Dimmer Switch position and monitored as a signal to the BCM. Common causes include Faulty Headlamp and Panel Dimmer Switch, Headlamp and Panel Dimmer Switch harness is open or shorted, Headlamp and Panel Dimmer Switch 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
- B2624 GMC indicates Display Dimming Signal Circuit.
- Common causes
- Common causes include Faulty Headlamp and Panel Dimmer Switch, Headlamp and Panel Dimmer Switch harness is open or shorted, Headlamp and Panel Dimmer Switch 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 B2624 GMC Description
What are the Possible Causes of the DTC B2624 GMC?
- Faulty Headlamp and Panel Dimmer Switch
- Headlamp and Panel Dimmer Switch harness is open or shorted
- Headlamp and Panel Dimmer Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B2624 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 B2624 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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Frequently Asked Questions about B2624 GMC Code
1. What does the OBDII code B2624 mean on a GMC vehicle?
B2624 indicates an issue with the Display Dimming Signal Circuit, which controls the dimming function of dashboard and display lights.
2. What are common symptoms of the B2624 code?
Symptoms can include dashboard lights not dimming, overly bright or dim displays, or inconsistent dimming functionality.
3. What causes the B2624 code to appear?
Common causes include a faulty dimmer switch, damaged wiring or connectors in the dimming circuit, or a malfunctioning body control module (BCM).
4. Can I drive my GMC vehicle with the B2624 code active?
Yes, the vehicle is typically drivable, but the dashboard lighting may not function properly, which could be distracting or unsafe at night.
5. How do I diagnose the B2624 code?
Start by inspecting the dimmer switch, wiring, and connectors for damage. Use a scan tool to check for related codes and test the voltage in the dimming circuit.
6. How can I fix the B2624 code on my GMC?
Repairs may involve replacing a faulty dimmer switch, repairing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the BCM if necessary.
7. How much does it cost to repair the B2624 code?
The cost depends on the cause of the issue, ranging from $50 for minor wiring repairs to $500 or more for BCM replacement.
8. Can a bad dimmer switch trigger the B2624 code?
Yes, a faulty dimmer switch is a common cause of this code and should be tested during diagnosis.
9. Does the B2624 code affect other vehicle systems?
Typically, this code only affects the dashboard and display lighting, but in rare cases, it could be linked to other BCM-related issues.
10. How do I prevent the B2624 code from occurring again?
Regularly inspect and maintain the dimmer switch, wiring, and connectors to ensure they remain in good condition and free from corrosion.
Discuss the causes and fixes for B2624 GMC OBDII Code
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