Well, that Autozone part cross-references correct, but aftermarket temp senders are notorious for being the wrong resistance curve. I would probably get a different aftermarket sender that cross-references correctly and try it, like this one. They're cheap enough you can experiment a little.
http://www.summitracing.com/parts/sm...olet/model/k10
You could also try to find a NOS GM part 8993106.
BTW, any chance the temp gauge in your truck was replaced? You should probably get some resistors and check those numbers to verify that it is the stock gauge. Easy to do.