Ok,I went out to look at my trucks lock,couldn't take it out because of my weather stripping.I remembered that the suburban really don't have any weather stripping and pulled it out.Flat side should be up.Use a small screw driver and pry back each prong on the clip(4) and pull the shaft and rotate it to the correct position.Remember,there is a small spring in there that will jump or fall out,should be a small washer also.Here are two pictures for you.
lock pic #1 lock pic#2 I hope this has helped you,good luck.
Tim