AutoCodes – GMC – B3600 2017 GMC Sierra

B3600 2017 GMC Sierra Code - Passenger Compartment Dimming Request Signal Circuit

Quick Answer

The instrument panel dimmer switch is used to increase and decrease the brightness of the interior backlighting components. Common causes include Faulty Headlamp Switch, Headlamp Switch harness is open or shorted, Headlamp 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: B3600 2017 GMC Sierra indicates Passenger Compartment Dimming Request Signal Circuit .
Common causes: Common causes include Faulty Headlamp Switch, Headlamp Switch harness is open or shorted, Headlamp 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 156

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 13, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B3600 2017 GMC Sierra Description

The instrument panel dimmer switch is used to increase and decrease the brightness of the interior backlighting components. The instrument panel dimmer switch provides a voltage signal to the Body Control Module (BCM) that will increase as the brightness of the lights are increased and decrease as the brightness of the lights are decreased. The BCM provides a low reference, signal, and B+ voltage reference to the instrument panel dimmer switch. When the instrument panel dimmer switch is placed in the desired position, the dimmed voltage setting is applied from the instrument panel dimmer switch through the instrument panel dimmer switch signal circuit to the BCM. The BCM interprets the signal and applies a Pulse Width Modulated (PWM) voltage through the LED dimming 1 and dimming 2 control circuits illuminating the interior backlighting to the requested level of brightness.

OBDII Code B3600 2017 GMC Sierra - Passenger Compartment Dimming Request Signal Circuit - AutoCodes.com — B3600 2017 GMC Sierra Code - Passenger Compartment Dimming Request Signal Circuit

What does this mean?

What are the Possible Causes of the DTC B3600 2017 GMC Sierra?

Faulty Headlamp Switch
Headlamp Switch harness is open or shorted
Headlamp Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3600 2017 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 does this mean?

Code Tech Notes

B3600:03 Passenger Compartment Dimming Request Signal Circuit Low Voltage
B3600:07 Passenger Compartment Dimming Request Signal Circuit High Voltage

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3600 2017 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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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 B3600 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code B3600 in a 2017 GMC Sierra related to the Passenger Compartment Dimming Request Signal Circuit?

- Common symptoms include dim or flickering interior lights, erratic behavior of the instrument cluster, and issues with the radio display dimming.

2. What can cause the OBDII code B3600 in a 2017 GMC Sierra?

- The code B3600 typically indicates a problem with the Passenger Compartment Dimming Request Signal Circuit, which can be caused by wiring issues, a faulty dimming control module, or a malfunctioning ambient light sensor.

3. How can I diagnose the cause of OBDII code B3600 in my 2017 GMC Sierra?

- To diagnose the issue, you can start by checking the wiring connections related to the dimming control module, inspecting the ambient light sensor for any damage, and testing the dimming control module for proper functionality.

4. Can I repair the OBDII code B3600 issue in my 2017 GMC Sierra myself?

- Depending on your level of automotive knowledge and experience, you may be able to repair the B3600 code issue yourself by identifying and fixing any wiring faults, replacing the dimming control module if necessary, or addressing any problems with the ambient light sensor.

5. Is it safe to continue driving my 2017 GMC Sierra with OBDII code B3600 present?

- While the B3600 code related to the Passenger Compartment Dimming Request Signal Circuit may not directly affect the drivability of the vehicle, it is recommended to address the issue promptly to avoid potential electrical malfunctions in the future.

6. How much does it typically cost to repair OBDII code B3600 in a 2017 GMC Sierra?

- The cost of repairing the B3600 code can vary depending on the underlying cause of the issue. Simple fixes like repairing wiring connections may be inexpensive, while replacing a faulty dimming control module or ambient light sensor could be more costly.

7. Can a malfunctioning ambient light sensor trigger OBDII code B3600 in a 2017 GMC Sierra?

- Yes, a malfunctioning ambient light sensor can indeed trigger the B3600 code as it plays a crucial role in detecting changes in ambient lighting conditions and transmitting signals to the dimming control module.

8. What steps should I take if the interior lights in my 2017 GMC Sierra are not dimming properly?

- If the interior lights in your Sierra are not dimming as expected, it is advisable to first check the ambient light sensor for any issues, inspect the wiring connections, and test the dimming control module for functionality to diagnose the problem accurately.

9. Will resetting the vehicle's computer system clear OBDII code B3600 in a 2017 GMC Sierra?

- Resetting the vehicle's computer system may temporarily clear the B3600 code, but if the underlying issue with the Passenger Compartment Dimming Request Signal Circuit is not addressed and resolved, the code is likely to reappear.

10. Can extreme temperature changes impact the Passenger Compartment Dimming Request Signal Circuit in a 2017 GMC Sierra?

- Yes, extreme temperature changes can potentially affect the components of the Passenger Compartment Dimming Request Signal Circuit, leading to issues with the dimming functionality and triggering the B3600 OBDII code.