For fastest service, contact Lowrance directly at 800-628-4487. Have your model, serial # and purchase receipt available.If your GPS was purchased from PCI Race Radios or through one of our dealers and distributed by PCI, we would be happy to help coordinate the warranty return/replacement process for you. You are responsible for all freight charges, but there are no PCI service fees.If your GPS was purchased outside of PCI distribution, we will still gladly help you with your repair/warranty for a $40 service charge.To send your GPS to PCI for warranty support, please fill out the service repair form.