AutoCodes – GMC – B1745 2016 GMC Sierra

B1745 2016 GMC Sierra 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 2016 GMC Sierra 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 172

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2016 GMC Sierra 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 2016 GMC Sierra - Driver Seat Rear Up Switch Circuit - AutoCodes.com — B1745 2016 GMC Sierra Code - Driver Seat Rear Up Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B1745 2016 GMC Sierra?

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 2016 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

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1745 2016 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.

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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 B1745 2016 GMC Sierra Code

1. What does OBDII code B1745 mean on a 2016 GMC Sierra?

Code B1745 indicates an issue with the Driver Seat Rear Up Switch Circuit, which controls the rear height adjustment of the driverâ€™s seat.

2. What are the common symptoms of code B1745 in a 2016 GMC Sierra?

Symptoms may include the driverâ€™s seat rear height adjustment not working, limited seat movement, or an illuminated check engine or airbag light.

3. What causes code B1745 to appear in a GMC Sierra?

Common causes include a faulty seat adjustment switch, damaged wiring or connectors, or a malfunctioning seat control module.

4. How can I diagnose code B1745 in my 2016 GMC Sierra?

Start by visually inspecting the seat adjustment switch, wiring, and connectors for damage or corrosion. Use a multimeter to test for continuity and proper voltage in the circuit.

5. Can I still drive my GMC Sierra with code B1745?

Yes, the vehicle is typically still drivable, but the driverâ€™s seat rear height adjustment may not function properly.

6. How do I fix code B1745 on a 2016 GMC Sierra?

Repairs may involve replacing the seat adjustment switch, repairing damaged wiring, or replacing the seat control module if it is faulty.

7. Is code B1745 covered under warranty for a 2016 GMC Sierra?

It depends on your vehicleâ€™s warranty terms. Check with your dealership to see if seat-related electrical issues are covered.

8. How much does it cost to repair code B1745 in a GMC Sierra?

Repair costs can vary, ranging from $50 to $300, depending on whether itâ€™s a simple wiring fix or a replacement of the seat adjustment switch or module.

9. Can a blown fuse cause code B1745 in a 2016 GMC Sierra?

While uncommon, a blown fuse in the seat adjustment circuit could trigger this code. Check the fuse box and replace any blown fuses if necessary.

10. Do I need professional help to fix code B1745 in my GMC Sierra?

If youâ€™re experienced with electrical diagnostics and repairs, you may be able to fix it yourself. Otherwise, itâ€™s best to seek assistance from a qualified mechanic.