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B3884 2016 Chevrolet Silverado Code - Center High Mounted Stop Lamp Circuit

Quick Answer

The B3884 diagnostic trouble code (DTC) in a 2016 Chevrolet Silverado relates to the Center High Mounted Stop Lamp (CHMSL) circuit. Common causes include Burnt-out CHMSL bulb, Damaged wiring harness leading to the CHMSL, Faulty CHMSL assembly. 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 Chevrolet Silverado indicates Center High Mounted Stop Lamp Circuit.
Common causes
Common causes include Burnt-out CHMSL bulb, Damaged wiring harness leading to the CHMSL, Faulty CHMSL assembly.
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 12, 2024
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Code B3884 2016 Chevrolet Silverado Description

The B3884 diagnostic trouble code (DTC) in a 2016 Chevrolet Silverado relates to the Center High Mounted Stop Lamp (CHMSL) circuit. This code indicates a malfunction in the circuit responsible for the vehicle's high-mounted brake light, which is typically located at the top of the rear window or on the roof of the vehicle. The CHMSL is an essential safety feature as it provides additional visibility to drivers behind the vehicle when braking, especially in adverse weather conditions or at night.

OBDII Code B3884 2016 Chevrolet Silverado - Center High Mounted Stop Lamp Circuit
B3884 2016 Chevrolet Silverado Code - Center High Mounted Stop Lamp Circuit

Common Causes of B3884 2016 Chevrolet Silverado

  1. Burnt-out CHMSL bulb
  2. Damaged wiring harness leading to the CHMSL
  3. Faulty CHMSL assembly
  4. Malfunctioning CHMSL control module
  5. Corrosion or loose connections in the CHMSL circuit

Symptoms of B3884 2016 Chevrolet Silverado

  1. Inoperative high-mounted brake light
  2. Warning light on the dashboard indicating an issue with the CHMSL
  3. Vehicle failing a state inspection due to a malfunctioning CHMSL
  4. Other drivers signaling that the high-mounted brake light is not working

How to Fix B3884 2016 Chevrolet Silverado

  1. Begin by visually inspecting the CHMSL bulb to check for any signs of damage or burnout. Replace the bulb if necessary.
  2. Inspect the wiring harness leading to the CHMSL for any visible damage, corrosion, or loose connections. Repair or replace the wiring as needed.
  3. Test the CHMSL assembly to ensure it is functioning properly. If the assembly is faulty, replace it with a new one.
  4. Use a diagnostic tool to check the CHMSL control module for any error codes or malfunctions. Replace the control module if it is the source of the issue.
  5. Clear the DTC from the vehicle's computer system and test the CHMSL to verify that it is now operating correctly.

Cost to Fix B3884 2016 Chevrolet Silverado

The cost of repairing a B3884 DTC related to the Center High Mounted Stop Lamp Circuit in a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of replacing a CHMSL bulb is relatively inexpensive, typically ranging from $10 to $20 for the part. However, if the problem lies in the wiring harness, CHMSL assembly, or control module, the repair costs can increase significantly.

What does this mean?

Tech Notes for B3884 2016 Chevrolet Silverado

B3884:01 Center High Mounted Stop Lamp Circuit Short to Battery

B3884:02 Center High Mounted Stop Lamp Circuit Short to Ground

B3884:04 Center High Mounted Stop Lamp 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 B3884 2016 Chevrolet Silverado Code

1. What does the OBDII code B3884 on a 2016 Chevrolet Silverado mean?

The code B3884 indicates a problem with the Center High Mounted Stop Lamp Circuit in the vehicle.

2. What are the common symptoms of a B3884 trouble code in a 2016 Chevrolet Silverado?

Common symptoms include the center high-mounted stop lamp not working, the brake light staying on continuously, or the brake light flickering intermittently.

3. What are the possible causes of the B3884 trouble code in a 2016 Chevrolet Silverado?

Potential causes may include a faulty center high-mounted stop lamp assembly, a damaged wiring harness, a blown fuse, or a malfunctioning brake light switch.

4. How can I diagnose the B3884 trouble code in my 2016 Chevrolet Silverado?

You can start by visually inspecting the center high-mounted stop lamp for any visible damage. Then, check the wiring and connections for any signs of wear or corrosion. Finally, use a multimeter to test the voltage at the stop lamp circuit.

5. What are some repair tips for fixing the B3884 trouble code in a 2016 Chevrolet Silverado?

If the center high-mounted stop lamp is faulty, replace it with a new assembly. Ensure all wiring connections are secure and free of corrosion. Check and replace any blown fuses related to the stop lamp circuit.

6. Can I continue driving my 2016 Chevrolet Silverado with the B3884 trouble code?

It is not recommended to drive the vehicle with a malfunctioning center high-mounted stop lamp, as it can compromise road safety. Get the issue diagnosed and repaired as soon as possible.

7. How much does it typically cost to repair the B3884 trouble code in a 2016 Chevrolet Silverado?

The cost of repair can vary depending on the specific cause of the issue. Replacing a faulty stop lamp assembly may cost between $50 to $150, while repairing wiring or fuse issues can range from $100 to $300.

8. Will resetting the trouble codes clear the B3884 code in my 2016 Chevrolet Silverado?

Resetting the trouble codes may temporarily clear the B3884 code, but if the underlying issue is not fixed, the code is likely to return. It's important to diagnose and repair the root cause of the problem.

9. How can I prevent the B3884 trouble code from recurring in my 2016 Chevrolet Silverado?

Regularly inspecting the center high-mounted stop lamp for any damage, maintaining a clean and secure wiring harness, and promptly addressing any brake light issues can help prevent the B3884 trouble code from reoccurring.

10. Is the B3884 trouble code a common issue in 2016 Chevrolet Silverado vehicles?

While it may not be extremely common, issues with the Center High Mounted Stop Lamp Circuit can occur in 2016 Chevrolet Silverado vehicles, especially with age and wear on the components.

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