AutoCodes – GMC – B3605 2016 GMC Sierra

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

Quick Answer

Ground is supplied at all times to the adjustable pedal switch. Common causes include Faulty Adjustable Pedal Forward Switch, Adjustable Pedal Forward Switch harness is open or shorted, Adjustable Pedal Forward 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: B3605 2016 GMC Sierra indicates Adjustable Pedal Rearward Switch Circuit Protection Time-Out.
Common causes: Common causes include Faulty Adjustable Pedal Forward Switch, Adjustable Pedal Forward Switch harness is open or shorted, Adjustable Pedal Forward 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.

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Code Popularity 162

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3605 2016 GMC Sierra Description

Ground is supplied at all times to the adjustable pedal switch. The adjustable pedal forward and rearward switches are inputs to the seat memory control module. When the switch is operated to the forward or rearward direction, it supplies a ground path for the signal inputs from the seat memory control module. The seat memory control module then commands the adjustable pedals motor to move in response to the switch signal. The Diagnostic Trouble Code (DTC) will be set when the seat memory control module detects a short to ground in the rearward signal circuit for greater than 60 s.

OBDII Code B3605 2016 GMC Sierra - Adjustable Pedal Rearward Switch Circuit Protection Time-Out - AutoCodes.com — B3605 2016 GMC Sierra Code - Adjustable Pedal Rearward Switch Circuit Protection Time-Out

What does this mean?

What are the Possible Causes of the DTC B3605 2016 GMC Sierra?

Faulty Adjustable Pedal Forward Switch
Adjustable Pedal Forward Switch harness is open or shorted
Adjustable Pedal Forward Switch circuit poor electrical connection
Faulty Driver Seat Memory Control Module

How to Fix the DTC B3605 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3605 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.

Need more information about the B3605 2016 GMC Sierra code?

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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.