AutoCodes – GMC – P1762 GMC

P1762 GMC Code - Transmission Mode Switch Signal Message

Quick Answer

The Body Control Module (BCM) is constantly sending the Engine Control Module (ECM) and Transmission Control Module (TCM) serial data messages with information regarding transmission mode switch activation. Common causes include Faulty Transmission Control Module (TCM), Faulty Body Control Module (BCM). 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: P1762 GMC indicates Transmission Mode Switch Signal Message.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Faulty Body Control Module (BCM).
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 1,397

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 Aug 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1762 GMC Description

The Body Control Module (BCM) is constantly sending the Engine Control Module (ECM) and Transmission Control Module (TCM) serial data messages with information regarding transmission mode switch activation. The TCM sets this code when it detects a discrepancy in the structure of the message causing the signal message integrity to be questioned. The Diagnostic Trouble Code (DTC) is set when the TCM detects an error in the rolling count value that does not match with the BCM.

OBDII Code P1762 GMC - Transmission Mode Switch Signal Message - AutoCodes.com — P1762 GMC Code - Transmission Mode Switch Signal Message

What does this mean?

What are the Possible Causes of the DTC P1762 GMC?

Faulty Transmission Control Module (TCM)
Faulty Body Control Module (BCM)

How to Fix the DTC P1762 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 P1762 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 P1762 GMC code?

Need more information on how to fix the P1762 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1762 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P1762 2014 GMC Sierra — Transmission Mode Switch Signal Message
P1762 2015 GMC Sierra — Transmission Mode Switch Signal Message
P1762 2016 GMC Sierra — Transmission Mode Switch Signal Message
P1762 2017 GMC Sierra — Transmission Mode Switch Signal Message
P1762 2018 GMC Sierra — Transmission Mode Switch Signal Message

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 P1762 GMC Code

1. What are the common symptoms of OBDII code P1762 in a GMC vehicle?

- Common symptoms include issues with shifting gears, transmission slipping, and the transmission not engaging properly.

2. What does the OBDII code P1762 in a GMC indicate?

- This code indicates a problem with the transmission mode switch signal message, which can affect the transmission's performance.

3. What are the possible causes of OBDII code P1762 in a GMC?

- Possible causes include a faulty transmission mode switch, damaged wiring or connectors, or issues with the transmission control module.

4. How can I diagnose the cause of OBDII code P1762 in my GMC vehicle?

- A thorough inspection of the transmission mode switch, wiring, and connectors, as well as testing the transmission control module, can help diagnose the issue.

5. Can I continue driving my GMC vehicle with OBDII code P1762?

- It is not recommended to continue driving with this code as it can lead to further damage to the transmission system. Seek professional help for diagnosis and repairs.

6. How can I repair OBDII code P1762 in my GMC?

- Repair options may include replacing the transmission mode switch, repairing damaged wiring or connectors, or reprogramming the transmission control module.

7. Is it possible to reset OBDII code P1762 in a GMC without fixing the underlying issue?

- While you can clear the code with a diagnostic tool, it is important to address the root cause to prevent the code from reoccurring and ensure proper transmission function.

8. Can a DIY enthusiast fix OBDII code P1762 in a GMC?

- Depending on your skills and experience, you may be able to diagnose and repair this code yourself. However, complex transmission issues may require professional assistance.

9. How much does it typically cost to repair OBDII code P1762 in a GMC?

- The cost of repairs can vary depending on the specific cause of the code and the labor rates in your area. It's best to get a diagnosis from a trusted mechanic for an accurate estimate.

10. Are there any preventive maintenance tips to avoid OBDII code P1762 in a GMC?

- Regularly checking and maintaining your vehicle's transmission system, including the mode switch and wiring, can help prevent issues that may trigger this code.