Do you have any vibration at hwy. speed? That is another good indicator that your CV's are going. You might as well plan on replacing them, 386k is a good run on almost any component of your truck, especially the drivetrain. Do both sides, you'll have all the tools out and it's a pain so you might as well get it over with. I did a Nissan, first side took an hour, 2nd side 15 minutes. Once you are warmed up and know what to do it's easy.