Performance gas mileage chips are available at places like Amazon or AutoZone. The cost of these chips can be as low as $80, but do your research—since the performance chip overrides Chevy’s original manufacturer’s settings, going cheap could be dangerous if the chip is faulty.
While installation of the chip is simple, proceed with caution. Any time changes are made to the ECU (electronic control unit) of a vehicle, there is a strong chance** it won’t pass an emissions test**.
Also, remember that tuning is illegal in some states.