2002 - 2003 Chevy Trailblazer & GMC Envoy Radio. AM FM CD Cassette Player. 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 is for a Chevrolet Trailblazer & GMC Envoy factory OEM AM FM cassette CD radio that has been professionally remanufactured. 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. 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 these vehicles 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. Feel free to give us a call with compatibility questions. 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. Please Note: 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. This process varies greatly from dealer to dealer, verify cost with your local dealer before purchase.