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How To Reset Transmission Control Module Chevy?

Do you feel your chevy is getting sluggish, and you are tired of its transmission? Are you think thinking about how to reset the transmission control module chevy? Well, you don’t need to be an engineer or expert to do that, and in fact, it is excellent for transmission.

Do you know, many other parts of your vehicle rely on the transmission control module’s functionality, including the throttle position sensor, temperature sensor, turbine sensor, transmission fluid, engine, and brake pedal position sensor.

If this mechanism doesn’t work properly, your transmission will not be able to perform effective shift gears. Other parts in your vehicle may break down and even get damaged when couldn’t function properly.

You will come across a quick and easy chevy transmission reset method as you read ahead.

Resetting chevy’s transmission control module: 

1. Check key position

Before you start the procedure of resetting the transmission control module of your Chevy, it is really necessary first to check the key position. You must change the key’s position to 2 at the beginning. 

Check if the dashboard lights are glowing or not and if yes, you can carry the further process. You don’t need to step on the accelerator and start your chevy. And also, be careful while you set the key position to the appropriate number.

Keep your ears attentive when listening to the engine sounds, as there will be two clicks at a time. The dashboard lights will glow but remember you should still not start the engine even in this position.

2. Press the accelerator 

After finishing the previous step, the lights and key position are ready to use. Now, let’s focus mainly on the accelerator, and you just have to step lightly on the accelerator pedal and press the liver down.

Ensure that you don’t push the accelerator all the way down, as it will activate the kick-down switch. Now keep pressing the pedal to turn on the switch without changing pressure for a few minutes and continue to the next step.

3. Keep waiting and be patient 

Remember that this is not a fast process, and it may take some time, for like about 10 minutes, for this process to occur. Now, if you are determined and set your mind to reset the transmission control module of your chevy, you cannot hurry things up.

You got to keep patience and wait for the accelerator to do its work. While maintaining your patience, just make sure that you don’t move your leg from the peddle or change its pressure. 

Initially, applying pressure to the accelerator for about 15 seconds during this time period is quite enough for the accelerator pedal to begin its working for the full reset procedure for your chevy’s transmission control module.

4. Turn off the keys

Now, this is the stage where we talk about turning off the keys. You have pressed the pedal without intervals at certain times, and you need to go ahead and return to the key after applying pressure from your foot on the accelerator pedal for about 10-12 seconds. 

You must strictly note that you must not release the pressure by letting your foot off of the pedal during this process, as this is really important for this step to get completed. Make sure your foot is always on the pedal. 

Remember the keys that we have talked about in the previous step. You made the keys turn to 2, right? You have to go through the particular key again so that you can return it to its previous position.

Like the starting point, it will set the key to turning it off. You can just use your hands to manually turn the key to zero and don’t remove the key from the ignition after selecting the key to zero. 

Remember that you don’t need to or even try to remove the keys if the button is not getting off, and this might happen when you don’t turn off the key switch. So, after changing the key to its previous position, you must keep it there.

Ensure that this step is followed as your chevy’s TCM resetting program actually depends on it. These things still depend on chevy’s model as most don’t really require the key to getting removed. 

So keep the variation process in check as not every model has the smoothness of performing this step correctly. 

5. Release pressure from the pedal

Now you must be relieved to hear that you can take your foot off the pedal and stop applying pressure on it. But before that, there are some things you must conform to, and you have first to see if the key turned back to its previous zero position.

You will see your efforts going in vain if you don’t maintain the pressure on the pedal until the key turns off to zero. You don’t want that to happen, right? So, keep your foot working on the accelerator until you have finished turning the key to zero.

6. Wait and let the engine rest 

The restart process for chevy’s transmission control module takes a little time. You might be thinking this is such a long process, but understand that, just as the human body needs rest, a car’s engine needs to take rest too, and you are almost near to finishing this process. 

Let your car’s engine rest at least for about 5 minutes after taking your foot off the pedal, and also look if the ignition key is off. Take your time and do not change the key.  

7. Ready to go

The procedure is done, and you are done with the Engine Control Unit (ECU) process and the Transmission Control Unit (TCM) process. 

Now, all you have to do is take your chevy on a nice drive for a minimum of about 20 minutes to understand the cooperation between these two units when done with the TCU and ECU programming.

First, start driving slowly at the beginning and focus on the gear shifting response. While driving, the transmission of gare should be smooth and accurate, which means that the TCU process will certainly work cooperatively along with the ECU.

This was the last step for resetting the transmission control module, and now you are all set to hit the roads once again in your chevy. 

Signs that your Transmission Control Module is Going Bad 

There are many different signs that your car’s transmission control module will give you when going bad. Here are some of the most common signs of a bad transmission control module:

1. Slow acceleration: 

You will know your car’s TCM isn’t working properly when your vehicle takes longer than usual to pick up speed.

2. Unpredictable Gear Shifting

The automatic transmission system depends on the transmission control module for shifting, so a bad transmission module will cause incorrect, unpredictable, or unintended shifting. This can even lead to serious accidents. 

3. Unable to Shift Gears

This usually presents itself when you can’t shift out of neutral or get stuck in the same gear. The transmission will not shift, and you either won’t be going anywhere and be stuck in neutral/ first gear, or the maximum speed of first gear is limited.

4. Affects Fuel Economy

When the fuel economy of your chevy has drastically declined for no reason, then a bad TCM could be its main reason as, generally, problems with the vehicle’s transmission system usually lead to bad fuel economy and poor gas mileage. 

Your engine will end up working harder than usual if you have a bad transmission control module that affects this timing. It will consume more fuel than normal, causing you to spend extra money than the actual expectation at the fuel station.

5. High Gear Shifting Problem

If you face problems shifting into higher gears, get your car’s TCM checked. When you gradually increase speed while driving, the transmission should properly shift into higher gears at the appropriate time. 

If this doesn’t happen in your case, you might notice that your chevy engine’s RPM just keeps increasing instead of slightly dropping. If the faulty TCM refuses to shift to a higher gear, you may never reach your intended speed.

6. Check Engine Light

See if there are any lights on the dashboard. The Check Engine warning light could mean several things when illuminated on your dashboard. 

But suppose you notice any problems with your shifting in addition to the Check Engine light being on. In that case, the problem is most likely with your transmission control module or some other component of your transmission system.


If you follow the method mentioned above step to step with keeping every warning and important point in mind, you will find resetting chevy’s transmission control module is not that difficult as it sounds. 

It certainly won’t take much of your time to finish the method, and you can drive your chevy on the road without any worries. I hope you got a better understanding after reading this article of how to reset transmission control module chevy.

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