Ahh yes, the 1999 and up 5 speed, I have one in my 2000 and I know what your talking about. My bigger problem was going from 5th to 4th. At anything over 50 mph I just usually double clutch. One thing I've noticed is form 35,000 miles from when I bought it to 55,000 mile on it now, it actually shifts better. I changed the gear oil to a synthetic and that actually seemed to help. Its a bit stiff in colder weather untill its driven a little while, but hte best thing to do was to just shift easy and drive it easy and eventually the tranny might come around. Mine stopped the 3rd gear gring a long time ago. I think if you shift them too fast or too hard its hard on the syncros. There is a bulletin on it and pretty much you have to take it to your local Chevy dealer and they replace all the syncros in it, I didn't want to trust them to do that, so I just left it, and its really not all that bad. Try double clutching (I know it may be a pain) but in time it'll help wear the syncros back in a little.
I know, this sounds like the lazy way out, and somewhat unbelievable, but it does help, don't push it too hard, go easy, and in time it will get better, also the synthetic gear oil might help a bit too.
How many miles on it?

?? HTH Dave
