Originally posted by metalmulisha777@Aug 9 2005, 06:27 PM
i have a b&m and mines fine
Apparently the B&M shift kit for the 4L60E is for '93-'01, so it makes sense that your '99 would be fine w/ it.

It's interesting, since there have been no "major" changes to the 4L60E since model year 1999. Maybe the PCM program/version for '02 and above is the possible issue

I've noticed in another post or two that you plan to upgrade to an '02 PCM. You may want to make sure that the B&M shift kit will be okay for that. Not saying there will be a problem, just might want to confirm it for yourself