keep seeing them in sigs...help plz.

 

click the 4.8 column, and that tells you how to do the free mods there.
http://www.sshotrods.com/performance/gmtruck/

 

here the are you can look at the othere things you can do in the link I gave before

http://www.sshotrods.com/performance...e/99up/airbox/

http://www.sshotrods.com/performance...size/99up/egr/

http://www.sshotrods.com/performance.../99up/airtube/

http://www.sshotrods.com/performance...99up/egrplate/

 

Thanks,I'll check there.

 

once you look there and see what they are you'll be able to do them easily. most of them help part throttle response and such. mainly like driving around town. i think the egr delete helped me a lot. at least it seemed so.

 

Thanks.