[hugger6933]

I have removed the upper collar on the ones I have done. I started out by taking a little flat screwdriver[ the really small type with the magnet in the end] and kinda "score" around the bottom of the collar where it is pressed on to the shaft knuckle and work the groove. I go around it a couple of times to scrape out the gunk in there and then start gently pry or pulling up at the top. The Chevrolet service manual calls for a puller that hooks into the upper lip to pull it off but good luck finding one of those tools. After scoreing and prying and pulling it usally[the upper collar that is] will work loose and come right off. Be careful and work slowly because that metal is thin and will bend easily. Once the collar is off it is very easy to change the turn signal wsitch.