Replaced my tire hoist with one refurbished by a company on ebay (seller ID = tirehoist, name Chris). Very reasonably priced and it works perfect. After my original quit working, I drove around with the spare in the garage and did not like the ride, truck rode hard and wanted more weight back there.
We also carry an air compressor from the Hybrids, with the fix-a-flat stuff, a real can of fix-a-flat and a plug kit with plugs. We almost always wind up giving the can away to some stranded motorist. Also run Load Range C tires to prevent road hazards but still got a nail through the treads earlier this month!
The Dorman style does away with the secondary latch as do the latest tire hoist part numbers. Type in your VIN over at GMPartsDirect and you can see what replacement parts and the numbers you need for things like the hoist and tube.