Chevy Silverado Tow/Haul Mode Not Working [Troubleshooting And Fixes]

Navigating the road with a hefty load in tow can be a challenging task, particularly if your vehicle’s Tow/Haul mode isn’t functioning as expected. If you’re a Chevy Silverado owner encountering this issue, this blog is for you. 

Issues with the Tow/Haul mode can range from a faulty switch, wiring problems, and issues with the Transmission Control Module to software glitches. 

So buckle up as we delve into this problem, demystify it, and equip you with the knowledge you need to keep your Chevy Silverado in optimal condition.

Chevy Silverado Tow/Haul Mode Not Working

Understanding Tow/Haul Mode In Your Chevy Silverado  

The Tow/Haul mode in your Chevy Silverado is an essential feature designed to make towing heavy loads easier and safer. 

Activating this mode modifies the vehicle’s transmission shift patterns, allowing for better control and performance when towing. 

It optimizes gear positions, reduces shift cycling, and enhances engine braking – all crucial when managing a heavy load. 

However, when this mode fails, your towing capability and vehicle control may be severely compromised, making every tow a potential hazard.

What Causes Chevy Silverado’s Tow/Haul Mode Not Working?

What Causes Chevy Silverado's Tow/Haul Mode Not Working?

Several factors could lead to the malfunction of the Tow/Haul mode in your Chevy Silverado. Let’s take a detailed look at the most common ones:

#1- Faulty Tow/Haul Mode Switch

The switch that activates the Tow/Haul mode could be the culprit. Prolonged use, dirt, moisture, or a short circuit could cause it to malfunction or fail entirely. 

Checking the switch for any visible signs of damage, and testing its continuity with a multimeter, can help identify if it is the root cause.

Check the switch for any visible signs of damage, such as cracks, loose connections, or moisture. If any damage is found, the switch may need to be replaced.

Use a multimeter to test the continuity of the switch. This will help determine if the switch is functioning properly. 

If continuity is not detected when the switch is activated, it may indicate a faulty switch that needs to be replaced.

#2- Wiring Issues

The electrical wiring connected to the Tow/Haul mode switch could be damaged, loose, or corroded.

Wires in your vehicle can deteriorate over time due to wear and tear, or they can be damaged by rodents or road debris. 

Inspecting the wiring and connectors for any signs of damage can help you spot if this is causing the problem.

Wiring Issues

Inspect the wiring and connectors for any signs of damage, such as frayed wires, loose connections, or corrosion.

If any issues are found, the damaged wiring or connectors should be repaired or replaced. In some cases, rodents or road debris can damage the wiring.

Check for signs of chewed wires or debris that may have caused damage. Repair or replace any damaged wiring as needed.

#3- Transmission Control Module (TCM) Problems

The TCM is the computer that controls your vehicle’s transmission, including the Tow/Haul mode.

If it’s malfunctioning or has failed, the Tow/Haul mode may not work properly. Diagnostic tools can be used to check for any trouble codes related to the TCM.

Use a diagnostic tool to scan for trouble codes related to the TCM. This will help identify if there are any specific issues with the module.

If trouble codes indicate TCM problems, it is recommended to consult a qualified mechanic or dealership to diagnose further and repair the TCM. They may need to replace the TCM if it is determined to be faulty.

#4- Software Issues

Sometimes, the problem could be with the software that controls the TCM and the Tow/Haul mode. Software glitches or outdated software could cause the Tow/Haul mode to malfunction as expected. 

In such cases, a software update or reset may be necessary.

Check with the vehicle manufacturer or authorized service center for any available software updates for the TCM. 

Updating the software may resolve any glitches or bugs that are causing the Tow/Haul mode malfunction.

In some cases, performing a software reset on the TCM can help resolve software-related issues.

This can be done by disconnecting the vehicle’s battery for a few minutes and then reconnecting it. 

Note that this procedure may require reprogramming certain vehicle settings.

Maintenance Tips To Prevent Chevy Silverado Tow/Haul Mode Malfunction

Preventive maintenance is key to averting problems with your Chevy Silverado’s Tow/Haul mode. Here are a few tips to help you:

  • Regularly inspect and clean the Tow/Haul mode switch. If it shows signs of wear or damage, consider replacing it.
  • Check the wiring and connectors related to the Tow/Haul mode for any signs of damage, corrosion, or looseness. Regularly inspect your vehicle for any signs of rodent activity, as they can often cause damage to the wires.
  • Regularly service your vehicle’s transmission and ensure the TCM is in good working condition. If your vehicle’s diagnostic system throws up any codes related to the transmission or the TCM, get it checked and repaired immediately.
  • Keep the vehicle’s software up-to-date. If you experience any issues with the Tow/Haul mode, consider checking if there’s a software update available or if a reset could solve the issue.
  • Follow the manufacturer’s recommended maintenance schedule. Regular service and checks can help catch and fix any potential issues before they become severe.


The Tow/Haul mode is a vital feature for Chevy Silverado owners who regularly haul heavy loads. When it’s not working, it can lead to a significant decline in performance and safety. 

Understanding the potential causes of this malfunction and how to prevent them is essential for maintaining your vehicle’s optimal performance and safety on the road.

However, if you’re experiencing persistent issues, it’s recommended to seek professional help to avoid further complications.

Remember, the key to smooth and hassle-free rides, especially when towing, is understanding your vehicle and taking good care of it. 

Stay informed, stay safe, and enjoy your journeys with your Chevy Silverado.

Related posts

Similar Posts