B3884 2016 GMC Sierra Code - Center High Mounted Stop Lamp Circuit
Quick Answer
The brake pedal position sensor is used to sense the action of the driver's application of the brake pedal. Common causes include Faulty Center High Mounted Stop Lamp, Center High Mounted Stop Lamp harness is open or shorted, Center High Mounted Stop Lamp 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
- B3884 2016 GMC Sierra indicates Center High Mounted Stop Lamp Circuit.
- Common causes
- Common causes include Faulty Center High Mounted Stop Lamp, Center High Mounted Stop Lamp harness is open or shorted, Center High Mounted Stop Lamp 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 B3884 2016 GMC Sierra Description
What are the Possible Causes of the DTC B3884 2016 GMC Sierra?
- Faulty Center High Mounted Stop Lamp
- Center High Mounted Stop Lamp harness is open or shorted
- Center High Mounted Stop Lamp circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B3884 2016 GMC Sierra?
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.
Code Tech Notes
B3884:02 Center High Mounted Stop Lamp Circuit Short to Ground
B3884:04 Center High Mounted Stop Lamp Circuit Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B3884 2016 GMC Sierra 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 B3884 2016 GMC Sierra Code
1. What does the OBDII code B3884 mean on a 2016 GMC Sierra?
The code B3884 indicates an issue with the Center High Mounted Stop Lamp (CHMSL) circuit, often related to wiring, connections, or the lamp itself.
2. What are the common symptoms of the B3884 code?
Common symptoms include the center high-mounted stop lamp not working, a warning light on the dashboard, or other brake light-related malfunctions.
3. What causes the B3884 code to appear?
The code can be caused by a burned-out CHMSL bulb, faulty wiring, corroded connectors, a damaged lamp assembly, or a malfunctioning Body Control Module (BCM).
4. How do you troubleshoot the B3884 code?
Start by inspecting the CHMSL bulb, checking the wiring and connectors for damage or corrosion, and testing the circuit for proper voltage and ground.
5. Can I drive my 2016 GMC Sierra with the B3884 code?
Yes, but it’s not recommended as the center high-mounted stop lamp plays a critical role in alerting drivers behind you when braking.
6. How do you fix the B3884 code on a 2016 GMC Sierra?
Repairs may include replacing the CHMSL bulb, repairing damaged wiring or connectors, cleaning corroded terminals, or replacing the lamp assembly.
7. Does the B3884 code always mean the CHMSL bulb is bad?
No, the issue could be with the wiring, connectors, or even the BCM, so a thorough diagnosis is necessary.
8. How much does it cost to repair the B3884 code?
Repair costs can range from $20 for a replacement bulb to $200 or more if wiring or BCM repairs are required.
9. Can a faulty BCM cause the B3884 code?
Yes, a malfunctioning Body Control Module can disrupt the CHMSL circuit and trigger the code.
10. Is the B3884 code covered under warranty for a 2016 GMC Sierra?
It depends on your vehicle’s warranty coverage, but electrical components like the BCM may be covered under a powertrain or extended warranty.
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