Not sure which 2009 Chevy Impala Power Programmers & Performance Tuners are right for you? We have over 5642 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:
"I bought this to improve performance and mpg. Happy with both. 1 to 2 MPG increase and plenty of power. Never thought my 03 F150 4.2 had this kind of power. Running premium setting. Great product." —Ken P from Harrison, OH bought a Jet Performance Programmer for a 2009 Chevy Impala, 4.2L V6, EFI, automatic transmision.