Hey there, if your brake lights are staying on all the time or not working at all, this Wells A04701 brake light switch is probably what you need! This little part does a big job - it controls your brake lights, cruise control, and even the shift interlock so you can get out of park. Fits a ton of GM vehicles from 1999 to 2009 including Chevy, GMC, Buick, Cadillac, Hummer, and Isuzu models. Wells makes quality replacement parts that meet or exceed the original equipment specs, so you know it'll fit right and work properly. Installation is usually pretty straightforward - just make sure to disconnect your battery first! Don't drive around with malfunctioning brake lights - it's a safety issue and you might get pulled over. Keep a spare in your glove box just in case, especially if you drive an older GM truck or SUV. This is one of those parts that can leave you stranded if it fails completely, so it's good to replace it when you first notice issues.