Not sure which 2004 Chevy Silverado Performance Chips & Programmers are right for you? We have over 3535 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 ordered the stage 2 chip. It was easy to install it took about 15 min. I do'nt if it has improved my gas milage because I've been having to much fun driving my truck with all the extra power if you know what I mean!" —Ed G from Sterling Heights, MI bought a Jet Performance Module for a 2004 Chevy Silverado.
"I programmed my Superchip to the performance mode and not only got more power but also am getting better gas mileage. I have only ran one tank through it so far but am very pleased." —Jeff B from Blossom, TX bought a Superchips Flashpaq Tuner for a 2004 Chevy Silverado.
"My 2500 HD was getting 12.3 miles per gallon city and 14.5 highway according to factory settings. It was getting more like 10-11 city and 13.5 highway. I changed the air filter and added the Hypertech E-con and it is now getting 13.8 city and 15.3 highway according to last tank of gas. I installed the programmer and then added the first setting and have seen a difference so I'm curious to see if how the other settings will work.With a truck heavy duty truck like mine, anything helps. Good product!" —Mark C from Loganville, GA bought a Hypertech Max Energy E-CON for a 2004 Chevy Silverado.
"The power & gas miledge is well worth the money." —John H from Athens, GA bought a Superchips Flashpaq Tuner for a 2004 Chevy Silverado.
"This thing preforms as advertised, adds some power for sure. This is mainly done through shift points etc, but is fun none the less. I did not purchse this for fuel economy, so I have not tested that program. Service from superchips is lacking to say the least, I have emailed them a couple times and have yet to recieve a reply. If you have replaced your stock radio beware, as you will have to play with the wireing a little before programing your vehicle. This is something superchips has not mentioned and not replied to. Other than that a fun product that does indeed change the way you rig will run, and it is easily noticable." —Clay V from Deering, NH bought a Superchips Cortex Programmer for a 2004 Chevy Silverado.
"Overall a 3.5 out of 5." —Matt B from Jefferson City , MO bought an Edge CS Evolution Programmer for a 2004 Chevy Silverado.
"After comparing several of the tuners I settled on the Cortex from Superchip. It is super easy to install and I have noticed my mileage improved from mid 14's to high 16's mpg. I also added a K&N air filter. I will try the trailer hauling mode in the next few weeks. I travel 200 miles each way to our farm in central Kansas to hunt turkeys and deer. I pull a trailer with a Kawaski Mule back and forth. The trailer and mule weigh about 2500 lbs. I am excited to see how much it helps with pulling my trailer. Your people were very helpful and knowledgeable. Thanks for your help, I will order from AutoAnything again." —Richard B from Burlingame, KS bought a Superchips Cortex Programmer for a 2004 Chevy Silverado.
"Easy to install looks great and tons of options" —Jason T from Hanlontown, IA bought a Bully Dog Triple Dog GT Tuner (49-State Legal) for a 2004 Chevy Silverado.