Not sure which 2004 Jeep Grand Cherokee 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:
"Wow i love this programmer. It outperforms the JET chip i had before and gives more options. Although its a little pricey, i would definitely buy again. The fact that its internet updateable is a huge plus as well. I only use top of the line products on my jeep and this is definitely top of the line. I tuned my engine for 91 octane fuel, adjusted my speedo for 32" tires, and removed the top speed and rev limiters. The JET chip could never do all of that. Definitely recommend this tuner for auto enthusiasts" —Cameron D from Enon Valley, PA bought a Superchips Flashpaq Tuner for a 2004 Jeep Grand Cherokee, 4.0L 6-cyl. engine.
"The tuner does appear to improve the fuel economy even when the performance program is uploaded. The cost of the tuner should be alot less, it is only software, and the hardware of the tuner is not very expensive looking. Overall I did notice some improvement in the performance department too." —Eric K from Lake Ariel, PA bought a Superchips Flashpaq Tuner for a 2004 Jeep Grand Cherokee, 4.0L 6-cyl. engine.
"Upon recieving my tuner I immediatly changed the tune to 87 performance and corrected my speedometer for my larger tires. The performance gains are more than i expected and its corrected the lag i used to feel on hot days and with the a/c running. Mileage increased 2mph and im now able to keep up with traffic in the fast lane." —Craig B from Allentown, PA bought a Superchips Flashpaq Tuner for a 2004 Jeep Grand Cherokee, 4.0L 6-cyl. engine.