I have a 99' gmc sierra 4.8l... i want to supercharge it.. is there anything i have to do to anything else so it wont blow up any parts.. and does any one reccommend any type of supercharger or brand, please let me know thanks.  

I installed a Magnuson supercharger on a 4.8L tahoe and it ran great. It looked factory when done and drove perfect. I would recomend this supercharger to anyone. Everything needed came n the kit and the instructions where very good. It took about 8 hours to do. Makes a good weekend project  

Yeah, I've been impressed with the trucks I've driven that had a Magnacharger on them. Great throttle response, and straightforward installation.  

Really? I've done a little research and a lot of gmc/chevy truck owners needed to swap different trannys and get new gears..  

If it's just your basic off-the-shelf Magnacharger, you should be fine with the stock tranny. If it doesn't already have one, I'd definitely consider installing a trans cooler, though, as the added power going through the trans is definitely going to produce more heat.