welcome! truck looks nice.



I am newb as well in the north Dallas area, having 06 rcsb delivered this weekend if it all works out.....

 

Quick question...my dad and brother (1st owner & 2nd owner) have always run regular gas in this thing but it's the flex fuel setup where you can put E85 in it. Is it as easy as just pumping E85 in there or do I need to run the regular gas completely out of the tank if I want to do that or what? Can they be mixed?

By the way, I took the "SIERRA SLE" and "FLEX FUEL" badges off today. If anyone needs them they're free. Just paying shipping ($5-10). They're in great shape.

 

If you want the best results run all the gas out of it then fill it up with corn juice.

 

Welcome from Colleyville!!!

Start out with CAI, brand doesn't really matter b/c you on see so much from gain from one. Next get exhaust with longtube headers. Again don't have to buy the best b/c you only get so much gain from headers and exhaust. You will need to get a custom tune to see the full potential of the headers. Personally I would run true 2.5" duals with and x pipe over a ypip set up.

Gm installed electric fans in your truck so theres your first up grade!

 

i mix 93octane and e85 all the time. i think 90% e85 and 10% 93 seems to run good.