AutoCodes – GMC – C0585 2015 GMC Sierra

C0585 2015 GMC Sierra Code - Left Rear Shock Absorber Actuator Circuit

Quick Answer

The Suspension Control Module commands variable levels of current to each shock absorber actuator in response to rough road, braking, or abrupt steering maneuver driving conditions. Common causes include Faulty Left Rear Shock Absorber Actuator, Left Rear Shock Absorber Actuator harness is open or shorted, Left Rear Shock Absorber Actuator 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: C0585 2015 GMC Sierra indicates Left Rear Shock Absorber Actuator Circuit.
Common causes: Common causes include Faulty Left Rear Shock Absorber Actuator, Left Rear Shock Absorber Actuator harness is open or shorted, Left Rear Shock Absorber Actuator 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 239

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 Jul 16, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C0585 2015 GMC Sierra Description

The Suspension Control Module commands variable levels of current to each shock absorber actuator in response to rough road, braking, or abrupt steering maneuver driving conditions. The current variation is performed by pulse width modulation (PWM) of the system voltage. The Suspension Control Module continuously measures the actual current of each actuator. When a deviation between commanded and actual current is detected, a Diagnostic Trouble Code (DTC) is set.

OBDII Code C0585 2015 GMC Sierra - Left Rear Shock Absorber Actuator Circuit - AutoCodes.com — C0585 2015 GMC Sierra Code - Left Rear Shock Absorber Actuator Circuit

What does this mean?

What are the Possible Causes of the DTC C0585 2015 GMC Sierra?

Faulty Left Rear Shock Absorber Actuator
Left Rear Shock Absorber Actuator harness is open or shorted
Left Rear Shock Absorber Actuator circuit poor electrical connection
Faulty Suspension Control Module

How to Fix the DTC C0585 2015 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

C0585:01 Left Rear Shock Absorber Actuator Circuit Short to Battery
C0585:02 Left Rear Shock Absorber Actuator Circuit Short to Ground
C0585:04 Left Rear Shock Absorber Actuator Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0585 2015 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 C0585 2015 GMC Sierra code?

Need more information on how to fix the C0585 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the 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 C0585 2015 GMC Sierra Code

1. What does the OBDII code C0585 mean on a 2015 GMC Sierra?

C0585 indicates an issue with the left rear shock absorber actuator circuit, which is part of the vehicle's suspension system.

2. What are the common symptoms of code C0585?

Symptoms may include reduced ride quality, a Service Suspension System warning on the dashboard, and possibly a noticeable difference in handling or stability.

3. What causes the C0585 code to appear?

Common causes include a faulty shock absorber actuator, damaged wiring or connectors in the circuit, or failure of the suspension control module.

4. Can I drive my 2015 GMC Sierra with the C0585 code?

Yes, but itâ€™s not recommended for extended periods as it may lead to further suspension damage or reduced handling performance.

5. How do I diagnose the C0585 code?

Diagnosis involves inspecting the wiring and connectors for damage, testing the left rear shock actuator for functionality, and using a scan tool to check for related codes.

6. How do I fix the C0585 code?

Repairs may include replacing the left rear shock actuator, repairing damaged wiring or connectors, or reprogramming or replacing the suspension control module if needed.

7. How much does it cost to fix the C0585 code?

Repair costs vary but can range from $200 to $800, depending on whether the actuator, wiring, or control module needs replacement.

8. Can a bad suspension control module cause code C0585?

Yes, a malfunctioning suspension control module can cause communication issues with the shock absorber actuator, triggering the code.

9. How can I prevent the C0585 code from recurring?

Regularly inspect the suspension system, keep connectors free of corrosion, and address suspension-related issues promptly to avoid future problems.

10. Do I need special tools to repair the C0585 code?

Yes, a professional-grade scan tool is often required to diagnose and clear the code, and in some cases, specialized tools may be needed to replace the shock actuator.