Hey David Paul, It looks similar but this one does not seem to work with GM trucks? I could not find the exact SST. Of course, i forgot to ask if the local parts place had a loaner tool (also check local GM truck clubs). However, the lubricant on the lock ring will most likely make this job a piece of cake. I would also add some anti-seize to the metal pieces that hold the lockring in place. They were pretty rusted and not sure if you can replace those without replacing entire tank.
https://www.amazon.com/dp/B000F5LJ7...TF8&colid=26LK4IN5NEJR0&coliid=I3131OGKMFL7RA
Good morning Red. I don't have an answer to why you can not edit, but I'd this the SST you were thinking of?