Quote Originally Posted by danbenili
....I think I'm in need of a GM shop manual for the Truck. I have a Chilton manual and it is severely lacking (IMO) and the alldata does not appear to have everything the shop manual would contain....Paul
The GM shop manual won't have anything in it (except dust) you can't find at alldatadiy, but the same can't be said about the reverse. Try using the search feature. Some things are located categorically and not so easy to find. Terminology can be an issue as well.

If you already have alldata, there's no advantage to having a manual, unless you just want a bound copy. Also, if you get one off Ebay, it may not be current, and lack updated bulletins and part numbers.