AutoCodes – GMC – B1770 GMC

B1770 GMC Code - Driver Seat Motor Horizontal Circuit

Quick Answer

The seat adjuster motors are controlled by the Driver Seat Module (DSM) through the adjuster motor control circuits. Common causes include Faulty Driver Seat Motor Horizontal, Driver Seat Motor Horizontal harness is open or shorted, Driver Seat Motor Horizontal 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: B1770 GMC indicates Driver Seat Motor Horizontal Circuit.
Common causes: Common causes include Faulty Driver Seat Motor Horizontal, Driver Seat Motor Horizontal harness is open or shorted, Driver Seat Motor Horizontal 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 710

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 31, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1770 GMC Description

The seat adjuster motors are controlled by the Driver Seat Module (DSM) through the adjuster motor control circuits. In an inactive state both of the motor control circuits are grounded within the DSM. In an active state the DSM switches the appropriate motor control circuit to battery positive voltage. The direction of the adjuster motor rotation is determined by which of the motor control circuits is switched to battery positive voltage while the other remains grounded. During adjuster motor operation the DSM also monitors the current flow through the motor control circuits.

OBDII Code B1770 GMC - Driver Seat Motor Horizontal Circuit - AutoCodes.com — B1770 GMC Code - Driver Seat Motor Horizontal Circuit

What does this mean?

What are the Possible Causes of the DTC B1770 GMC?

Faulty Driver Seat Motor Horizontal
Driver Seat Motor Horizontal harness is open or shorted
Driver Seat Motor Horizontal circuit poor electrical connection
Faulty Driver Seat Module (DSM)

How to Fix the DTC B1770 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 B1770 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.

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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.