The Lexus GX is a survivor. The current second-generation model has been around since 2009 and only very recently received vital upgrades for the 2022 model. A new 10.3-inch touchscreen with Apple CarPlay, Android Auto, and Amazon Alexa integration, as well as six USB ports will add some modern tech to a dated cabin. The aging naturally-aspirated 4.6-liter V8, linked to an eight-speed automatic transmission, remains untouched with 301 horsepower and 329 lb-ft of torque on tap. But it appears Lexus has an upgrade in mind.

MotorTrend discovered that Toyota filed trademark application materials for the GX550 moniker in Costa Rica, positing that the upgrade would likely apply to US models. So we did some digging and uncovered a similar trademark application for the name "GX550" that Toyota filed with the United States Patent and Trademark Office (USPTO) on September 7, 2021.

While this confirms the 550 trim is US-bound, the documents make no mention as to when the GX550 will debut.

We're pretty sure it won't be before the redesigned Tundra arrives. That reveal is taking place later this month. Once the Tundra and its new twin-turbo V6 enjoy some time in the spotlight, we can easily see Lexus revealing an updated GX for the 2023 model year.

The current GX is officially called the GX460 in reference to its V8. What does the "550" refer to? The answer is very likely the new 3.5-liter twin-turbocharged V6 engine found under the hood of the recently revealed Toyota Land Cruiser 300 Series.

Unfortunately, that SUV isn't slated to be sold in the US, but the engine is expected to be found in the about-to-be-revealed all-new Tundra full-size truck. Expect around 450 hp and 500 lb-ft of twist.

The GX550 is highly unlikely to have 550 hp, as its name suggests. The reason for this name is probably because it represents the SUV's engine progression. Using GX450 wouldn't make sense.

Would the V6's arrival mean the V8 is dead? Probably. The former has more power and better fuel efficiency. It's a simple business case. A 450-hp or so Lexus GX is just around the corner and SUV fans should celebrate.