Not sure which 2003 Chevy Silverado In-Line Modules are right for you? We have over 945 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"The chip was fairly easy to install if you have a torque wrench. Make sure you torque it down to factory spec or lights will come on the dash and gas gauge may not work right. Once torqued down it works great, better mileage and horsepower and with the price of gas where it is it should pay off in no time." —Kim B from Mount Vernon, IN bought a Jet Performance Module for a 2003 Chevy Silverado.