AutoCodes – GMC – P1775 2017 GMC Sierra

P1775 2017 GMC Sierra Code - Transmission Range Request Signal Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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
P1775 2017 GMC Sierra indicates Transmission Range Request Signal Message Counter Incorrect.
Common causes
Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 196
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 29, 2022
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Code P1775 2017 GMC Sierra Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Transmission Range Request Signal Message Counter is Incorrect.
OBDII Code P1775 2017 GMC Sierra - Transmission Range Request Signal Message Counter Incorrect - AutoCodes.com
P1775 2017 GMC Sierra Code - Transmission Range Request Signal Message Counter Incorrect

What are the Possible Causes of the DTC P1775 2017 GMC Sierra?

  • Faulty Transmission Control Module (TCM)
  • Transmission Control Module harness is open or shorted
  • Transmission Control Module circuit poor electrical connection

How to Fix the DTC P1775 2017 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1775 2017 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.

Need more information about the P1775 2017 GMC Sierra code?

Need more information on how to fix the P1775 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1775 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P1775 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P1775 in a 2017 GMC Sierra?

The common symptoms of OBDII code P1775 in a 2017 GMC Sierra may include issues with shifting gears, transmission slipping, hesitation when accelerating, and illuminated warning lights on the dashboard.

2. What does the OBDII code P1775 "Transmission Range Request Signal Message Counter Incorrect" mean for a 2017 GMC Sierra?

The code P1775 indicates that the transmission control module has detected an incorrect signal count related to the transmission range request message.

3. What are the possible causes of OBDII code P1775 in a 2017 GMC Sierra?

Possible causes of OBDII code P1775 in a 2017 GMC Sierra include faulty transmission range sensor, wiring issues, communication errors between modules, or a malfunctioning transmission control module.

4. How can I diagnose the OBDII code P1775 in my 2017 GMC Sierra?

Diagnosing the OBDII code P1775 may require using a diagnostic scanner to retrieve the code, checking the transmission range sensor for proper operation, inspecting the wiring for any damage, and testing the communication between modules.

5. Can I continue driving my 2017 GMC Sierra with OBDII code P1775 present?

It is not recommended to continue driving your 2017 GMC Sierra with the OBDII code P1775 present, as it can lead to further transmission issues and potentially cause damage if left unaddressed.

6. How do I repair OBDII code P1775 in a 2017 GMC Sierra?

Repairing OBDII code P1775 in a 2017 GMC Sierra may involve replacing the faulty transmission range sensor, repairing any damaged wiring, addressing communication errors between modules, or reprogramming the transmission control module.

7. Is it necessary to clear the OBDII code P1775 after making repairs to a 2017 GMC Sierra?

Yes, it is important to clear the OBDII code P1775 after making repairs to a 2017 GMC Sierra to reset the system and ensure that the issue has been resolved.

8. Can a DIYer fix OBDII code P1775 in a 2017 GMC Sierra?

While some aspects of diagnosing and repairing OBDII code P1775 may be possible for a DIYer, it is recommended to consult with a professional mechanic or technician for accurate diagnosis and proper repair.

9. How much does it cost to repair OBDII code P1775 in a 2017 GMC Sierra?

The cost of repairing OBDII code P1775 in a 2017 GMC Sierra can vary depending on the specific cause of the issue, parts needed for replacement, and labor costs. It is advisable to obtain estimates from local repair shops for an accurate cost assessment.

10. How can I prevent OBDII code P1775 from occurring in my 2017 GMC Sierra in the future?

To prevent OBDII code P1775 from occurring in the future, it is essential to perform regular maintenance on your vehicle, address any transmission issues promptly, and follow the manufacturer's recommended service schedule.

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