The news comes via GM Authority, which says the change was effective for the mid-2019 model year. Chevy's official consumer website for the Traverse no longer lists the turbo-four engine as an option. Both engines were mated to a nine-speed automatic transmission.
First offered for the front-wheel-drive RS version of the second-generation 2018 Traverse, the turbo-four made 257 horsepower and 295 pound-feet of torque, compared to 310 hp and 266 lb-ft in the V6. The four-cylinder engine is also found in the Chevrolet Malibu and Cadillac ATS, but in the Traverse, it apparently didn't offer enough to really distinguish it from the V6.
GM has developed a new version of the engine, this time a 2.0-liter inline-four with a twin-scroll turbocharger that makes 237 hp and 258 lb-ft of torque and can deactivate two of its four cylinders in order to conserve fuel. It makes its debut on the 2019 Cadillac XT4 — you can read our First Drive review of it here — and is rated by the EPA as getting a respectable 26 mpg in combined city/highway driving. It's also expected on the 2020 GMC Acadia crossover as one of three engine options, and standard on the SLT and Denali trim levels, and on the 2020 Cadillac XT5 and just-revealed CT5. We'll have to see whether GM brings it back for the Traverse.