AutoCodes – GMC – B3577 GMC

B3577 GMC Code - Suspension Control Select Switch Contact Malfunction

Quick Answer

The Electronic Suspension Control (ESC) Module supplies 5 volts and a ground to the suspension control switch's voltage divider circuit. Common causes include Faulty Suspension Control Select Switch, Suspension Control Select Switch harness is open or shorted, Suspension Control Select 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: B3577 GMC indicates Suspension Control Select Switch Contact Malfunction.
Common causes: Common causes include Faulty Suspension Control Select Switch, Suspension Control Select Switch harness is open or shorted, Suspension Control Select 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 447

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 Mar 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B3577 GMC Description

The Electronic Suspension Control (ESC) Module supplies 5 volts and a ground to the suspension control switch's voltage divider circuit. The suspension control switch changes the resistance value of the switch circuit which alters the voltage level received by the ESC module on the suspension control signal circuit. There are two possible voltage levels, and each voltage level corresponds to a switch selection position. The two switch positions are TOUR and SPORT. The ESC module monitors the voltage level on the suspension control switch signal circuit, and will set a Diagnostic Trouble Code (DTC) if the detected voltage level is not within the calibrated amount.

OBDII Code B3577 GMC - Suspension Control Select Switch Contact Malfunction - AutoCodes.com — B3577 GMC Code - Suspension Control Select Switch Contact Malfunction

What does this mean?

What are the Possible Causes of the DTC B3577 GMC?

Faulty Suspension Control Select Switch
Suspension Control Select Switch harness is open or shorted
Suspension Control Select Switch circuit poor electrical connection
Faulty Electronic Suspension Control (ESC) Module

How to Fix the DTC B3577 GMC?

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 B3577 GMC 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 B3577 GMC code?

Need more information on how to fix the B3577 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B3577 GMC code diagnosed by a professional: Find a repair shop in your area

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 B3577 GMC Code

1. What are the common symptoms of OBDII code B3577 GMC (Suspension Control Select Switch Contact Malfunction)?

- The common symptoms include an illuminated warning light on the dashboard, issues with the suspension system operation, and potential loss of control over suspension settings.

2. What are the possible causes of OBDII code B3577 GMC?

- The code B3577 GMC can be triggered by a faulty suspension control select switch, damaged wiring or connectors related to the switch, or a malfunction in the suspension control module.

3. How can I diagnose the Suspension Control Select Switch Contact Malfunction?

- Diagnosing this issue involves using a diagnostic scan tool to retrieve the OBDII code B3577, checking the suspension control select switch for proper functionality, and inspecting the wiring and connectors for any damage.

4. Can a DIYer repair OBDII code B3577 GMC at home?

- While it's possible for experienced DIYers to attempt repairs related to the suspension control select switch malfunction, it's recommended to consult a professional mechanic for accurate diagnosis and repair.

5. Is it safe to continue driving with OBDII code B3577 GMC active?

- It is not recommended to drive the vehicle with the B3577 code active, as it can affect the proper functioning of the suspension system and potentially compromise vehicle safety.

6. How much does it typically cost to repair OBDII code B3577 GMC?

- The cost of repairing the Suspension Control Select Switch Contact Malfunction can vary depending on the exact cause of the issue, but it may involve replacing the suspension control select switch, repairing wiring, or addressing issues with the suspension control module.

7. Will resetting the OBDII code B3577 GMC make it go away permanently?

- Resetting the code may temporarily turn off the warning light, but if the underlying issue causing the B3577 code is not addressed, it is likely to return. It's important to diagnose and repair the root cause of the problem.

8. Can extreme weather conditions trigger OBDII code B3577 GMC?

- Extreme weather conditions can potentially affect the electrical components related to the suspension control select switch, leading to malfunctions that trigger the B3577 code.

9. Are there any preventative measures to avoid OBDII code B3577 GMC?

- Regular inspection and maintenance of the suspension control select switch, as well as keeping an eye on any warning lights related to the suspension system, can help prevent the occurrence of code B3577 GMC.

10. How long does it typically take to repair OBDII code B3577 GMC?

- The repair time for OBDII code B3577 GMC can vary depending on the exact cause of the issue and the availability of parts. It's best to consult with a mechanic for a more accurate estimate based on your specific situation.