ReplacementRadios, one of the largest factory audio/video websites, has branched out!! If you?ve been to our site, you know we have a HUGE selection of OEM radios and compatible accessories. Now we?re offering a few select products here too. Same great ReplacementRadios quality.....in a new location. DETAILS This is a brand new OEM factory original Delco rear door speaker with part number 15144058. These appear to have been used in the 2006-2011 Cadillac DTS. However, please match your part number because the same speakers were not used in all sound systems. There are also multiple speakers in every system so, just because this might match one of the speakers in the system, does not mean it is the one you need. In other words, we're not guaranteeing it to be the one you need. We're just guaranteeing it is a 15144058. Determining if that is the one you need is up to you. This is brand new and has never been used. Why settle for a used speaker or a speaker repair kit when you can get a speaker that's never been used? These are assembly line left-overs. They were never installed. They are first quality, not rejects. There is a 30 day warranty. A warranty exchange is different from a return. SHIPPING, etc Shipping cost is based on weight and zip code. This site does the figuring, not us. If you feel their calculation is high, you might be underestimating the package weight and/or current shipping costs from our zip code (62401) to yours. Please don't ding us for shipping in the ratings, as we have no control over ever-increasing carrier rates. We will enter a tracking number into your order details here on the site. They will email it to you if your notification preferences are set correctly. A signature is not typically required. If you are not home to receive the package, it will most likely be left at your door. Please monitor it's progress and arrange to collect it when it arrives. This site provides a section/tab in each ad for Shipping information. We encourage you to check that section for prices, methods, time-frames, etc.