Not sure which 1999 GMC C/K 2500 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:
"This product do what they claim it does. I just had a little issue first when trying to install it but after contacting Superchips directly they had an update that fix the issue. Truck is now running a lot better." —Johnny C from Hephzibah, GA bought a Superchips Cortex Programmer for a 1999 GMC C/K 2500.