AutoCodes – GMC – B1745 GMC

B1745 GMC Code - Driver Seat Rear Up Switch Circuit

Quick Answer

The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster 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: B1745 GMC indicates Driver Seat Rear Up Switch Circuit.
Common causes: Common causes include Faulty Driver Seat Adjuster Switch, Driver Seat Adjuster Switch harness is open or shorted, Driver Seat Adjuster 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 750

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 Apr 24, 2023

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B1745 GMC Description

The Seat Memory Control Module supplies a reference voltage to each signal circuit of the Driver Seat Adjuster Switch. When the power seat or lumbar switches are pressed, the appropriate signal circuit from the Seat Memory Control Module is pulled low through the switch contacts indicating the power seat command. The Seat Memory Control Module then commands the driver seat or lumbar to move in response to the switch signals. The Diagnostic Trouble Code (DTC) will be set when there is a short to ground on a switch signal circuit.

OBDII Code B1745 GMC - Driver Seat Rear Up Switch Circuit - AutoCodes.com — B1745 GMC Code - Driver Seat Rear Up Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B1745 GMC?

Faulty Driver Seat Adjuster Switch
Driver Seat Adjuster Switch harness is open or shorted
Driver Seat Adjuster Switch circuit poor electrical connection
Faulty Seat Memory Control Module

How to Fix the DTC B1745 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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1745 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 B1745 GMC code?

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Need Help with the Code?

Get the B1745 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B1745 2014 GMC Sierra — Driver Seat Rear Up Switch Circuit
B1745 2015 GMC Sierra — Driver Seat Rear Up Switch Circuit
B1745 2016 GMC Sierra — Driver Seat Rear Up Switch Circuit
B1745 2017 GMC Sierra — Driver Seat Rear Up Switch Circuit
B1745 2018 GMC Sierra — Driver Seat Rear Up Switch Circuit

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 B1745 GMC Code

What does the OBDII code B1745 indicate for my GMC vehicle?

The B1745 code indicates a malfunction in the driver seat rear up switch circuit, which may affect the functioning of the seat adjustment feature.

What are common symptoms associated with the B1745 code?

Common symptoms include the driver seat not moving up or down, intermittent movement issues, or the seat adjustment switch not responding at all.

What could cause the B1745 code to trigger?

Possible causes include a faulty driver seat rear up switch, damaged wiring or connectors in the circuit, or a malfunctioning power seat control module.

How can I diagnose the issue related to code B1745?

Start by inspecting the driver seat rear up switch for physical damage, check the wiring and connectors for continuity, and test the power seat control module for proper operation.

What is the first step in repairing the B1745 code?

The first step is to visually inspect the driver seat rear up switch and its wiring for any signs of wear, damage, or corrosion that may be affecting the circuit.

Can I clear the B1745 code without fixing the issue?

While you can clear the code, it is not recommended as the underlying issue will likely cause the code to reappear and may lead to further seat adjustment problems.

How much does it typically cost to fix the issue related to B1745?

Repair costs can vary widely, but you might expect to pay between $100 to $500, depending on whether the switch, wiring, or control module needs to be replaced.

Is it safe to drive my GMC with the B1745 code present?

While it is generally safe to drive, the inability to adjust the driver's seat could lead to an improper driving position, which may affect comfort and safety.

Can I fix the B1745 code myself, or should I go to a professional?

If you have experience with automotive electrical systems, you may be able to diagnose and repair the issue yourself. Otherwise, it's best to consult a professional mechanic.