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Engine-Codes – GMC – P1761 2015 GMC Sierra

P1761 2015 GMC Sierra Code - Up and Down Shift Switch Signal Circuit

Quick Answer

The P1761 diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Up and Down Shift Switch Signal Circuit. Common causes include Faulty up and down shift switch, Damaged wiring or connectors in the shift switch circuit, Defective transmission control module (TCM). 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
P1761 2015 GMC Sierra indicates Up and Down Shift Switch Signal Circuit.
Common causes
Common causes include Faulty up and down shift switch, Damaged wiring or connectors in the shift switch circuit, Defective transmission control module (TCM).
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 12, 2024
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Code P1761 2015 GMC Sierra Description

The P1761 diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Up and Down Shift Switch Signal Circuit. This code indicates that there is a malfunction in the circuit responsible for sending signals to the transmission control module (TCM) when the upshift or downshift buttons on the shift lever are pressed. The TCM uses these signals to determine when to change gears in the transmission. When this circuit malfunctions, it can lead to issues with the transmission's shifting patterns, potentially causing erratic shifting, harsh shifting, or even the transmission getting stuck in a particular gear.

OBDII Code P1761 2015 GMC Sierra - Up and Down Shift Switch Signal Circuit
P1761 2015 GMC Sierra Code - Up and Down Shift Switch Signal Circuit

Common Causes of P1761 2015 GMC Sierra

  1. Faulty up and down shift switch
  2. Damaged wiring or connectors in the shift switch circuit
  3. Defective transmission control module (TCM)
  4. Corrosion or poor connections in the circuit
  5. Electrical issues such as a blown fuse or relay

Symptoms of P1761 2015 GMC Sierra

  1. Erratic shifting patterns
  2. Harsh shifting between gears
  3. Transmission getting stuck in a specific gear
  4. Delayed shifting response
  5. Illumination of the Check Engine Light

How to Fix P1761 2015 GMC Sierra

  1. Begin by conducting a visual inspection of the up and down shift switch and its wiring for any visible damage or corrosion.
  2. Test the shift switch using a multimeter to check for proper functionality.
  3. Inspect the wiring harness and connectors for any signs of damage or poor connections, repairing or replacing as necessary.
  4. Test the transmission control module (TCM) to ensure it is functioning correctly and communicating with the shift switch.
  5. Clear the DTC and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P1761 2015 GMC Sierra

The typical repair costs for addressing a P1761 code in a 2015 GMC Sierra can vary depending on the specific cause of the issue. On average, the parts required for this repair, such as a new shift switch or wiring harness, can range from $50 to $200. Labor costs at an auto repair shop can add an additional $100 to $300, depending on the shop's hourly rates and the complexity of the repair. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the extent of the repairs needed. It is advisable to consult with a professional mechanic for a more accurate cost estimate.

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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 P1761 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P1761 in a 2015 GMC Sierra?

The common symptoms of OBDII code P1761 in a 2015 GMC Sierra include issues with shifting gears, harsh shifting, transmission slippage, and the transmission going into "limp mode."

2. What can cause the OBDII code P1761 to trigger in a 2015 GMC Sierra?

The OBDII code P1761 in a 2015 GMC Sierra is typically triggered by a faulty up and down shift switch signal circuit, damaged wiring or connectors, or a defective shift solenoid.

3. How can I diagnose the OBDII code P1761 in my 2015 GMC Sierra?

To diagnose the OBDII code P1761 in a 2015 GMC Sierra, you can use a scan tool to retrieve the trouble codes, inspect the wiring and connectors for any damage, and test the shift solenoid for proper operation.

4. Can I continue driving my 2015 GMC Sierra with the OBDII code P1761?

It is not recommended to continue driving your 2015 GMC Sierra with the OBDII code P1761 as it can lead to further damage to the transmission. It is best to address the issue promptly.

5. How can I repair the OBDII code P1761 in my 2015 GMC Sierra?

Repairing the OBDII code P1761 in a 2015 GMC Sierra involves fixing the up and down shift switch signal circuit, repairing any damaged wiring or connectors, and replacing the shift solenoid if necessary.

6. Is it possible to clear the OBDII code P1761 in my 2015 GMC Sierra without repairing the issue?

Clearing the OBDII code P1761 without repairing the underlying issue will only temporarily turn off the check engine light. The code is likely to reappear if the root cause is not addressed.

7. How much does it cost to fix the OBDII code P1761 in a 2015 GMC Sierra?

The cost of fixing the OBDII code P1761 in a 2015 GMC Sierra can vary depending on the exact cause of the issue, but it typically ranges from $200 to $600 for parts and labor.

8. Can a DIY enthusiast repair the OBDII code P1761 in a 2015 GMC Sierra?

While some experienced DIY enthusiasts may be able to diagnose and repair the OBDII code P1761 in a 2015 GMC Sierra, it is recommended to seek professional help due to the complexity of transmission-related issues.

9. What are the long-term effects of ignoring the OBDII code P1761 in my 2015 GMC Sierra?

Ignoring the OBDII code P1761 in a 2015 GMC Sierra can lead to more severe transmission problems, potential transmission failure, and costly repairs in the long run.

10. How often does the OBDII code P1761 occur in a 2015 GMC Sierra?

The OBDII code P1761 can occur sporadically in a 2015 GMC Sierra, but it is essential to address it promptly to prevent further damage and ensure the proper functioning of the transmission.

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