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B3604 2018 GMC Sierra Code - Adjustable Pedal Forward Switch Circuit Protection Time-Out

Quick Answer

The B3604 diagnostic trouble code (DTC) for the 2018 GMC Sierra relates to the Adjustable Pedal Forward Switch Circuit Protection Time-Out. Common causes include Faulty adjustable pedal switch, Damaged or corroded wiring in the adjustable pedal circuit, Issues with the control module that manages the adjustable pedal function. 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
B3604 2018 GMC Sierra indicates Adjustable Pedal Forward Switch Circuit Protection Time-Out.
Common causes
Common causes include Faulty adjustable pedal switch, Damaged or corroded wiring in the adjustable pedal circuit, Issues with the control module that manages the adjustable pedal function.
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 08, 2024
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Code B3604 2018 GMC Sierra Description

The B3604 diagnostic trouble code (DTC) for the 2018 GMC Sierra relates to the Adjustable Pedal Forward Switch Circuit Protection Time-Out. In simpler terms, this code indicates that there is an issue with the circuit that controls the adjustable pedal function in the vehicle. The adjustable pedal feature allows the driver to move the pedals closer or further away from the driver's seat to achieve a more comfortable driving position.

OBDII Code B3604 2018 GMC Sierra - Adjustable Pedal Forward Switch Circuit Protection Time-Out
B3604 2018 GMC Sierra Code - Adjustable Pedal Forward Switch Circuit Protection Time-Out

Common Causes of B3604 2018 GMC Sierra

  1. Faulty adjustable pedal switch.
  2. Damaged or corroded wiring in the adjustable pedal circuit.
  3. Issues with the control module that manages the adjustable pedal function.
  4. Electrical problems such as a blown fuse or relay affecting the circuit.
  5. Water or moisture intrusion causing a short circuit in the adjustable pedal system.

Symptoms of B3604 2018 GMC Sierra

  1. Inability to adjust the pedals forward or backward.
  2. Warning light on the dashboard related to the adjustable pedal system.
  3. Unusual noises coming from the adjustable pedal area.
  4. The adjustable pedal function may work intermittently.
  5. The vehicle may go into a limp mode, restricting performance.

How to Fix B3604 2018 GMC Sierra

  1. Begin by conducting a thorough inspection of the adjustable pedal system, checking for any visible damage to the switch, wiring, or control module.
  2. Use a digital multimeter to test the continuity and voltage of the circuit components to pinpoint the source of the issue.
  3. Replace any faulty components such as the switch, wiring harness, or control module as needed.
  4. Clear the DTC from the vehicle's computer system using a diagnostic scanner to reset the error code.
  5. Test the adjustable pedal function to ensure that the issue has been resolved and that the system is functioning correctly.

Cost to Fix B3604 2018 GMC Sierra

The cost of repairing the Adjustable Pedal Forward Switch Circuit Protection Time-Out issue can vary depending on the specific cause of the problem and the parts and labor required for the repair. Generally, the cost of parts for this repair can range from $50 to $200, while labor costs may add an additional $100 to $300. Therefore, the total cost for repairing this issue could be anywhere from $150 to $500. It's essential to consider that labor rates can vary between different repair shops and locations, so it's advisable to obtain quotes from multiple sources to ensure a competitive price.

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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 B3604 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code B3604 in a 2018 GMC Sierra?

The common symptoms of code B3604 include the adjustable pedal not moving forward, a non-functional adjustable pedal feature, and a warning light illuminated on the instrument panel.

2. What causes the OBDII code B3604 in a 2018 GMC Sierra?

The code B3604 is triggered when the Adjustable Pedal Forward Switch Circuit Protection Time-Out occurs, typically due to a faulty adjustable pedal forward switch, damaged wiring, or a malfunctioning control module.

3. How can I diagnose the issue related to code B3604 in my 2018 GMC Sierra?

To diagnose the issue, start by checking the wiring harness and connectors for any visible damage. Test the adjustable pedal forward switch for continuity and proper operation using a multimeter. If necessary, consult a professional mechanic for a thorough diagnosis.

4. Can I repair the OBDII code B3604 in my 2018 GMC Sierra myself?

Depending on your experience level, you may be able to repair the code B3604 yourself by replacing the faulty adjustable pedal forward switch or repairing any damaged wiring. However, for more complex issues or if you're unsure, it's recommended to seek professional help.

5. Are there any tips for preventing OBDII code B3604 from recurring in a 2018 GMC Sierra?

To prevent the code from recurring, regularly inspect the adjustable pedal system for any signs of wear or damage. Avoid putting excessive pressure on the adjustable pedal to prolong its lifespan and prevent premature failures.

6. Is it safe to drive my 2018 GMC Sierra with OBDII code B3604 present?

While the vehicle may still be operational with the code present, it's recommended to address the issue promptly to avoid any potential safety hazards or further damage to the adjustable pedal system. Limit driving until the issue is resolved.

7. How much does it typically cost to repair OBDII code B3604 in a 2018 GMC Sierra?

The cost of repairing code B3604 can vary depending on the extent of the issue, the parts needed for replacement, and labor costs. It's advisable to obtain quotes from different mechanics or service centers to compare prices.

8. Can a faulty adjustable pedal forward switch cause other issues in a 2018 GMC Sierra?

Yes, a faulty adjustable pedal forward switch can lead to other issues such as the loss of adjustable pedal functionality, potential electrical problems, and the triggering of additional error codes related to the pedal system.

9. Will disconnecting the battery reset the OBDII code B3604 in a 2018 GMC Sierra?

Disconnecting the battery may reset the code temporarily, but if the underlying issue causing code B3604 is not addressed, the code is likely to reappear once the system is back in operation. It's recommended to diagnose and repair the root cause of the problem.

10. How long does it typically take to repair OBDII code B3604 in a 2018 GMC Sierra?

The repair time for code B3604 can vary depending on the complexity of the issue, the availability of parts, and the expertise of the technician. In general, the repair process may take a few hours to complete, but this can vary.

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