Not sure which 2009 Chevy Impala Performance Chips & Programmers are right for you? We have over 7429 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 was most impressed by how fast it tunes your vehicle and goes back to stock in a matter of 4 minutes I mainly purchased it to eliminate my
DOD it works I used the 91 octane tune and removed my speed limiter
I tried both firm and hard shift mode which makes a big difference
but I use normal shift because there are stories about my transmissions
reliability my gas mileage is crappy with or without DOD it always says
avg milage is 18.9" —Kenneth C from East Boston, MA bought a DiabloSport inTune I-1000 Tuner for a 2009 Chevy Impala, SS, 5.3L V8 LS4.