Largest Inventory of Factory Car Audio in the USA! 2002 – 2003. Chevy Trailblazer & GMC Envoy Radio. Part Number: 15058225 Compatible Part Numbers. 15169582 & 15195517 Option Code: UP0. This radio will need to be unlocked by a dealer and paired to your truck. Please see below for more details. This radio has been cleaned, serviced as needed and thoroughly checked. Part number is 15058225 with option code UP0. So please make sure this is the correct radio for your vehicle. Appearance is great as pictured, function is perfect! Please note that this radio will need to be unlocked by a GM dealer upon installation. Please confirm: that this is the radio your vehicle requires as some of the vehicles on the chart used more than one style of radio. Although this radio looks the same as the one used in cars, it is electronically different and will not work. This radio has been cleaned, upgraded, serviced as needed and thoroughly checked. All light bulbs in the face of the radio have been replaced and are brand new. This radio will need to be unlocked upon installation in your vehicle. It can be put into a fully functioning test mode for 10 minutes at a time but will need to be taken to a dealer for permanent pairing. The radio you receive will be as described. 9a – 6p EST, M-F. My family has been in the car radio business virtually from the beginning. My grandfather started the business back in the early 1930’s. I have been involved since the 1950’s with factory training from Ford, GM, and Chrysler. Give us a shot! Radios will generally be sent via UPS to the lower 48.