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P0733 2016 GMC Sierra Code - Transmission 3rd Gear Ratio Incorrect

Quick Answer

The P0733 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the transmission's third gear ratio is incorrect. Common causes include Faulty transmission solenoids, Malfunctioning transmission control module (TCM), Low transmission fluid levels. 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
P0733 2016 GMC Sierra indicates Transmission 3rd Gear Ratio Incorrect.
Common causes
Common causes include Faulty transmission solenoids, Malfunctioning transmission control module (TCM), Low transmission fluid levels.
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 16, 2024
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Code P0733 2016 GMC Sierra Description

The P0733 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the transmission's third gear ratio is incorrect. This means that the transmission is not shifting into third gear properly, which can lead to a variety of performance issues. The transmission in a vehicle is responsible for transferring power from the engine to the wheels, and when the gear ratios are incorrect, it can result in inefficient power transfer and poor overall performance.

OBDII Code P0733 2016 GMC Sierra - Transmission 3rd Gear Ratio Incorrect
P0733 2016 GMC Sierra Code - Transmission 3rd Gear Ratio Incorrect

Common Causes of P0733 2016 GMC Sierra

  1. Faulty transmission solenoids
  2. Malfunctioning transmission control module (TCM)
  3. Low transmission fluid levels
  4. Internal transmission damage
  5. Electrical issues in the transmission system

Symptoms of P0733 2016 GMC Sierra

  1. Harsh shifting between gears
  2. Slipping gears during acceleration
  3. Hesitation or delay in gear engagement
  4. Decreased fuel efficiency
  5. Illumination of the Check Engine Light

How to Fix P0733 2016 GMC Sierra

  1. Begin by conducting a thorough diagnostic scan to confirm the P0733 code and identify any other related issues.
  2. Check the transmission fluid level and quality, topping off or replacing as needed.
  3. Inspect the transmission solenoids and TCM for any signs of damage or malfunction, replacing as necessary.
  4. Perform a road test to verify that the transmission is shifting properly after repairs have been made.
  5. Clear the DTC and reset the vehicle's computer to ensure that the issue has been resolved.

Cost to Fix P0733 2016 GMC Sierra

The typical repair costs for addressing a P0733 code in a 2016 GMC Sierra can range from $200 to $800, depending on the specific cause of the issue and the extent of repairs needed. This estimate includes parts and labor, but it's important to note that prices can vary based on location, vehicle make and model, and the shop's labor rates. It's recommended to consult with a trusted mechanic or dealership for a more accurate cost estimate based on your individual circumstances.

What does this mean?

Tech Notes for P0733 2016 GMC Sierra

Incorrect ratio Diagnostic Trouble Code (DTC) may indicate a component condition with piston seals, clutch plates, or solenoids or it may be caused by a faulty turbine or output speed sensor signal.

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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 P0733 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P0733 in a 2016 GMC Sierra?

The common symptoms of OBDII code P0733 in a 2016 GMC Sierra include harsh shifting, slipping gears, hesitation during acceleration, and illuminated warning lights on the dashboard.

2. What does the OBDII code P0733 indicate in a 2016 GMC Sierra?

OBDII code P0733 in a 2016 GMC Sierra indicates that the powertrain control module (PCM) has detected an incorrect ratio for the transmission's third gear.

3. What are some possible causes of OBDII code P0733 in a 2016 GMC Sierra?

Possible causes of OBDII code P0733 in a 2016 GMC Sierra include low transmission fluid, a faulty transmission solenoid, a worn-out clutch, a malfunctioning torque converter, or internal transmission damage.

4. How can I diagnose the root cause of OBDII code P0733 in my 2016 GMC Sierra?

Diagnosing the root cause of OBDII code P0733 in a 2016 GMC Sierra may involve performing a transmission fluid level and condition check, conducting a thorough inspection of the transmission system, and using a professional diagnostic scanner to retrieve live data from the PCM.

5. Can I continue driving my 2016 GMC Sierra with OBDII code P0733?

It is not recommended to continue driving a 2016 GMC Sierra with OBDII code P0733, as it can lead to further damage to the transmission system and potentially result in costly repairs. It is advisable to address the issue promptly.

6. How can OBDII code P0733 in a 2016 GMC Sierra be repaired?

Repairing OBDII code P0733 in a 2016 GMC Sierra may involve addressing the root cause of the issue, which could include topping up or changing the transmission fluid, replacing faulty components like solenoids or clutches, or seeking professional help for more complex repairs.

7. Is it possible to reset OBDII code P0733 in a 2016 GMC Sierra without fixing the underlying issue?

Resetting OBDII code P0733 in a 2016 GMC Sierra without fixing the underlying issue may temporarily turn off the warning light, but the problem will likely reoccur. It is crucial to address the root cause of the code for a lasting solution.

8. Can a DIY enthusiast fix OBDII code P0733 in a 2016 GMC Sierra?

While some basic checks and maintenance tasks can be performed by a DIY enthusiast, diagnosing and repairing OBDII code P0733 in a 2016 GMC Sierra often requires specialized tools, technical knowledge, and experience. It is advisable to seek professional help for complex transmission issues.

9. How much does it typically cost to repair OBDII code P0733 in a 2016 GMC Sierra?

The cost of repairing OBDII code P0733 in a 2016 GMC Sierra can vary depending on the root cause of the issue, the extent of the damage, and the labor rates in your area. It is recommended to obtain quotes from reputable mechanics or dealerships for an accurate estimate.

10. Can regular maintenance help prevent OBDII code P0733 in a 2016 GMC Sierra?

Regular maintenance, such as timely transmission fluid changes, inspections, and addressing any minor issues promptly, can help prevent OBDII code P0733 in a 2016 GMC Sierra. Following the manufacturer's recommended maintenance schedule is key to keeping the transmission system in good condition.

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