GM trucks losing another fuel economy feature due to chip shortage

General Motors will start building some full-size trucks next week with no major fuel-saving function as the industry continues to be short of semiconductor chips.

The Chevrolet Tahoe is built at the GM plant in Arlington, Texas. (GM)

The start-stop function switches the engine off when the vehicle is stationary and starts it again automatically when the driver takes his foot off the brake. It is common in many internal combustion engines vehicles today.

A GM spokesman told The Detroit Free Press that the change would result in a 1 to 2 mpg drop in the combined fuel economy rating for the trucks and that the price would be reduced by $ 50.

The change affects certain trim levels of the following 5.3-liter and 6.2-liter V8 models with 10-speed automatic transmissions, including Base, High Country, Denali and AT4:

Certain equipment, including Base, High Country, Denali and AT4,

  • Chevrolet Tahoe and Suburban
  • GMC Yukon and Yukon XL
  • Cadillac Escalade and Escalade ESV
  • Chevrolet Silverado 1500
  • GMC Sierra 1500

In March the shortage resulted GM removed a cylinder deactivation function from the 5.3-liter V8 That also aims to improve fuel economy by cutting fuel to a few cylinders under light loads, and said it wouldn’t return until model year 2022 trucks go into production later this year.


GM has built some trucks without all the chips they need and stored them until supplies are available. It is now adding multiple booths at the Fort Wayne, Indiana assembly plant, which produces the Chevrolet Silverado 1500 and GMC Sierra 1500, to expedite completion of key models.

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