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Engine-Codes – GMC – B1770 GMC

B1770 GMC Code - Driver Seat Motor Horizontal Circuit

Quick Answer

The B1770 GMC code indicates a problem with the driver seat motor's horizontal circuit. Common causes include Faulty wiring or connectors in the driver seat motor circuit, Defective driver seat motor, Issues with the control switch for the driver seat. 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
B1770 GMC indicates Driver Seat Motor Horizontal Circuit.
Common causes
Common causes include Faulty wiring or connectors in the driver seat motor circuit, Defective driver seat motor, Issues with the control switch for the driver seat.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code B1770 GMC Description

The B1770 GMC code indicates a problem with the driver seat motor's horizontal circuit. This means that there is an issue with the electrical system that controls the horizontal movement of the driver's seat. The driver's seat motor is responsible for adjusting the seat position horizontally, allowing the driver to find a comfortable driving position. When this circuit malfunctions, it can lead to an inability to adjust the seat position, which can affect the driver's comfort and control of the vehicle.

OBDII Code B1770 GMC - Driver Seat Motor Horizontal Circuit
B1770 GMC Code - Driver Seat Motor Horizontal Circuit

Common Causes of B1770 GMC

  1. Faulty wiring or connectors in the driver seat motor circuit.
  2. Defective driver seat motor.
  3. Issues with the control switch for the driver seat.
  4. Corrosion or water damage in the electrical components.
  5. Electrical system malfunctions in the vehicle.

Symptoms of B1770 GMC

  1. Inability to adjust the driver's seat position horizontally.
  2. Unusual noises coming from the driver seat when attempting to adjust it.
  3. Jerky or uneven movement of the driver's seat.
  4. The driver's seat getting stuck in one position.
  5. Warning light on the dashboard related to the driver seat or electrical system.

How to Fix B1770 GMC

  1. Diagnose the issue by using a scan tool to retrieve the B1770 code and inspecting the driver seat motor circuit for any visible damage.
  2. Check the wiring, connectors, and switches for any signs of wear, corrosion, or loose connections.
  3. Test the driver seat motor to determine if it is functioning properly or needs to be replaced.
  4. Replace any faulty components such as wiring, connectors, switches, or the driver seat motor as needed.
  5. Clear the diagnostic trouble codes from the vehicle's system and test the driver seat to ensure it moves smoothly in both directions.

Cost to Fix B1770 GMC

The typical repair costs for addressing the B1770 GMC code can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the repair for this type of problem can range from $150 to $500, including parts and labor. However, it's important to note that the actual cost may be higher or lower based on the extent of the repairs needed and the rates charged by auto repair shops in your area. Additionally, diagnosis time and labor rates at auto repair shops can vary, so it's recommended to obtain a detailed estimate from a qualified technician before proceeding with the repair.

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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 B1770 GMC Code

1. What are common symptoms of OBDII code B1770 GMC (Driver Seat Motor Horizontal Circuit)?

The common symptoms include the driver seat not moving horizontally, the seat moving in the wrong direction, or the seat motor making unusual noises.

2. What can cause OBDII code B1770 GMC to trigger?

Possible causes include a faulty seat motor, damaged wiring or connectors in the seat motor circuit, or a malfunctioning seat motor control module.

3. How can I diagnose the issue related to OBDII code B1770 GMC?

You can start by checking the wiring and connectors for any visible damage, testing the seat motor for proper functionality, and using a diagnostic tool to scan for error codes.

4. What are some repair tips for addressing OBDII code B1770 GMC?

Try resetting the error code first to see if it reoccurs, then inspect and repair any damaged wiring or connectors, replace the faulty seat motor if necessary, and ensure proper connection and communication with the seat motor control module.

5. Can I drive my vehicle with OBDII code B1770 GMC present?

It is not recommended to drive the vehicle with this code active, as it may affect the functionality of the driver seat and compromise safety and comfort while driving.

6. How much does it typically cost to repair OBDII code B1770 GMC?

The cost of repair can vary depending on the cause of the issue and the extent of the repairs needed. It is advisable to consult with a professional mechanic for an accurate estimate.

7. Is OBDII code B1770 GMC a common issue in GMC vehicles?

While it may not be as common as some other OBDII codes, issues related to the driver seat motor horizontal circuit can occur in GMC vehicles, especially in older models or vehicles with high mileage.

8. Can I fix OBDII code B1770 GMC myself, or do I need a professional mechanic?

Depending on your skills and experience with automotive repairs, you may be able to address this code yourself by following proper diagnostic and repair procedures. However, if you are unsure or inexperienced, it is best to seek the help of a professional mechanic.

9. Will resetting the error code for OBDII code B1770 GMC solve the issue permanently?

Resetting the error code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed and repaired, it is likely to reoccur.

10. How urgent is it to address OBDII code B1770 GMC?

While the severity of the issue may vary, it is generally advisable to address this code in a timely manner to prevent further damage to the seat motor system and ensure the safe operation of the vehicle.

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