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B3605 2016 GMC Sierra Code - Adjustable Pedal Rearward Switch Circuit Protection Time-Out

Quick Answer

The B3605 diagnostic trouble code (DTC) for the 2016 GMC Sierra relates to the Adjustable Pedal Rearward Switch Circuit Protection Time-Out. Common causes include Faulty adjustable pedal switch, Damaged wiring in the adjustable pedal circuit, Defective control module that controls the adjustable pedal system. 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
B3605 2016 GMC Sierra indicates Adjustable Pedal Rearward Switch Circuit Protection Time-Out.
Common causes
Common causes include Faulty adjustable pedal switch, Damaged wiring in the adjustable pedal circuit, Defective control module that controls the adjustable pedal system.
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 11, 2024
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Code B3605 2016 GMC Sierra Description

The B3605 diagnostic trouble code (DTC) for the 2016 GMC Sierra relates to the Adjustable Pedal Rearward Switch Circuit Protection Time-Out. This code indicates that there is an issue with the circuit that controls the adjustable pedal feature in the vehicle. The adjustable pedal feature allows the driver to move the pedals closer or further away from the driver's seat, providing a more comfortable driving position.

OBDII Code B3605 2016 GMC Sierra - Adjustable Pedal Rearward Switch Circuit Protection Time-Out
B3605 2016 GMC Sierra Code - Adjustable Pedal Rearward Switch Circuit Protection Time-Out

Common Causes of B3605 2016 GMC Sierra

  1. Faulty adjustable pedal switch.
  2. Damaged wiring in the adjustable pedal circuit.
  3. Defective control module that controls the adjustable pedal system.
  4. Corrosion or poor connections in the circuit.
  5. Electrical issues such as a blown fuse or relay related to the adjustable pedal system.

Symptoms of B3605 2016 GMC Sierra

  1. The adjustable pedals may not move when the switch is activated.
  2. The adjustable pedal feature may only work intermittently.
  3. The adjustable pedals may move unexpectedly without input from the driver.
  4. The adjustable pedal system may be unresponsive to adjustments.

How to Fix B3605 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the adjustable pedal system, including the switch, wiring, and control module.
  2. Test the switch for proper functionality and replace it if necessary.
  3. Check the wiring for any damage or corrosion and repair or replace as needed.
  4. Test the control module for faults and replace if it is found to be defective.
  5. Clear the DTC and test the adjustable pedal system to ensure it is functioning correctly.

Cost to Fix B3605 2016 GMC Sierra

The typical repair costs for addressing the B3605 DTC in a 2016 GMC Sierra may range from $200 to $500, including parts and labor. However, it's important to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to obtain quotes from multiple repair shops to get a more accurate estimate for this repair.

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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 B3605 2016 GMC Sierra Code

1. What does the OBDII code B3605 mean on a 2016 GMC Sierra?

The code B3605 indicates an issue with the Adjustable Pedal Rearward Switch Circuit, specifically a protection time-out error.

2. What are the common symptoms of code B3605 in a 2016 GMC Sierra?

Symptoms may include the adjustable pedals not moving rearward, a malfunction warning, or the pedal adjustment system becoming unresponsive.

3. What causes the B3605 code to appear on a 2016 GMC Sierra?

Common causes include a faulty pedal adjustment switch, wiring issues such as damaged or shorted wires, or a problem with the adjustable pedal motor.

4. How can I troubleshoot the B3605 code in my GMC Sierra?

Start by inspecting the pedal adjustment switch, checking the wiring and connectors for damage, and testing the adjustable pedal motor for proper operation.

5. Can I still drive my 2016 GMC Sierra with the B3605 code active?

Yes, the vehicle is still drivable, but you may lose the ability to adjust the pedals, which could affect driver comfort and ergonomics.

6. How is the B3605 code diagnosed on a 2016 GMC Sierra?

A technician will use a scan tool to confirm the code, inspect the pedal adjustment system, and test the electrical circuit for faults like shorts, opens, or high resistance.

7. What repairs are commonly needed to fix code B3605?

Repairs may include replacing the pedal adjustment switch, repairing or replacing damaged wiring, or replacing the adjustable pedal motor if it is defective.

8. How much does it typically cost to fix the B3605 code on a 2016 GMC Sierra?

Repair costs can range from $100 to $400 depending on the specific issue, such as replacing a switch, repairing wiring, or replacing the pedal motor.

9. Can I reset the B3605 code without making repairs?

Clearing the code without addressing the issue may temporarily turn off the warning, but the problem will likely return until the root cause is fixed.

10. Is the B3605 code a common issue for 2016 GMC Sierra owners?

While not extremely common, it can occur, especially in vehicles with high mileage or frequent use of the adjustable pedal system. Regular maintenance can help prevent such issues.

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