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There's a good discussion over on www.ColoradoK5.com going on that has had some good info about the GV unit in it. I'm even less impressed than I was before. http://coloradok5.com/forums/showthread.php?t=230696

Well, all I know is I haven't actually met anyone with a big truck and the GV unit that really liked it. Great theory but in practice you're out thousands and it's practical uses are limited. As the guy with the C30 told me, "what do I need to split 2nd gear for?" He also said sometimes it...

Ever priced one of those GV od's? I know a few folks who have run them, including one on a 80's C35 crewcab with a 6.2L and TH400, and none of the results enough to do it again. A 700R4 can easily be upgraded to handle anything a 6.2L, even a turbo'd J model, can put out. They have a bad...

In '87 it should have had a NP208 part time. The full time 203 went away by 80.

If you get the whole Suburban you should have all the necessary parts provided nothing is broken or damaged. Talk to mangus on here, he's done the swap in a M1009.