Dumbing down the smarts in my modern Toyota Tundra

Sun, 08 Feb 2026 16:00:31 -0500

I'm not a big fan of data collection and connection just for the sake of it.

When I learned that remote start was paywall’d behind a subscription, both with the fob and the mobile app, it pushed me over the edge to find out how to dumb my 2021 Toyota Tundra.

This led me to the DCM module. You can learn more about this here. The long and short of it is constant data collection with data brokering to insurance companies on the side. No thank you. Toyota will tell you that you can completely opt out and disable all this via a software toggle on their end. Since these claims consistently are debunked, I wanted to go the for sure route. For sure after seeing this little nugget:

Unhooking the fuse to the DCM will throw errors, unplugging it will do the same while also disabling the trucks built in mic. I'm sure this was just a oversight, not just a way to demotivate folks from unplugging them. 😉

A bit more digging led me to other privacy minded folks. One person also made block off harnesses to disable the DCM while not losing unexpected functionality. Big shout out to this thread here.

Taking the dash and glove box apart wasn't too bad, for sure easier with my assistant.

Here's the little booger, slammed way back up and behind everything. I'm sure for no reason at all 😗

Installing the little wiring harness was a breeze

all back together and good as new. It's winter so the truck is dirtier than usual.

Success, I can now be certain the tundra can't phone home.

privacy on Lucas Freeman

Dumbing down the smarts in my modern Toyota Tundra