AutoCodes – GMC – B317A 2018 GMC Sierra

B317A 2018 GMC Sierra Code - Passenger Window Switch

Quick Answer

The driver and passenger window motors supply 12 V signal circuits to their respective window switches, when a window switch has been activated, a switch closes providing a ground to the appropriate signal circuit causing the voltage to drop to 0 V. Common causes include Faulty Driver Window Switch, Driver Window Switch harness is open or shorted, Driver Window 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: B317A 2018 GMC Sierra indicates Passenger Window Switch.
Common causes: Common causes include Faulty Driver Window Switch, Driver Window Switch harness is open or shorted, Driver Window 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 155

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 11, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B317A 2018 GMC Sierra Description

The driver and passenger window motors supply 12 V signal circuits to their respective window switches, when a window switch has been activated, a switch closes providing a ground to the appropriate signal circuit causing the voltage to drop to 0 V. The window motor will detect the voltage drop in the signal circuit and will command the window to move in the desired direction.
The driver window master control switch also contains control switches for the passenger, left rear and right rear window functions. When a window switch is pressed, a serial data message is sent to the Body Control Module (BCM). The BCM examines the request and checks for messages from other power window motors that may prohibit window movement. If no prohibitive messages have been received, the BCM will send a serial data message to the passenger window motor or to the appropriate rear window switch which will perform the command as requested.

OBDII Code B317A 2018 GMC Sierra - Passenger Window Switch - AutoCodes.com — B317A 2018 GMC Sierra Code - Passenger Window Switch

What does this mean?

What are the Possible Causes of the DTC B317A 2018 GMC Sierra?

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

How to Fix the DTC B317A 2018 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 B317A 2018 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 B317A 2018 GMC Sierra Code

1. What does the OBDII code B317A mean for a 2018 GMC Sierra?

This code indicates a fault with the passenger window switch, specifically a communication or functionality issue detected by the vehicle's Body Control Module (BCM).

2. What are the common symptoms of code B317A?

Symptoms may include the passenger window not operating, intermittent functionality, or the window switch not responding to inputs.

3. What causes code B317A on a 2018 GMC Sierra?

Common causes include a faulty passenger window switch, wiring issues, connector problems, or a failure in the BCM.

4. Can a bad fuse cause code B317A?

Yes, a blown fuse related to the window circuit may contribute to this code, although wiring or switch issues are more common.

5. How do I fix code B317A on my GMC Sierra?

Inspect the passenger window switch, wiring, and connectors for damage or corrosion. Replace the switch if faulty, and repair or reconnect wiring as needed.

6. Do I need to replace the passenger window switch for code B317A?

Not always. Sometimes the issue might be related to wiring or connector problems rather than the switch itself.

7. Can I clear code B317A without fixing the issue?

Clearing the code without addressing the root cause will likely result in the code returning. Proper diagnosis and repair are necessary.

8. How can I test the passenger window switch for functionality?

Use a multimeter to check for continuity and proper voltage at the switch. If the readings are outside normal ranges, the switch may need replacement.

9. Is code B317A related to the BCM?

Yes, the Body Control Module monitors the passenger window switch and may flag this code if it detects a malfunction or communication issue.

10. Should I take my 2018 GMC Sierra to a professional for code B317A?

If you lack experience with electrical diagnostics or if the issue persists after basic troubleshooting, it's advisable to consult a qualified mechanic.