i have a 03 bonneville sle n/a l36 my ? is what do i have to do to run e85 im going turbo soon and doing rockers,hv3,and cam but for now how do i run it?

There are conversion kits i beleive..but
cars can run on E85 by putting in larger injectors then using an air /fuel controller to adjust the ratio.it just recalibrates the signal from the airflow meter to the ECU. you have to add about 60% more fuel. and its hard to keep the CEL from lighting. kits are like 600 bucks or so this above is a cheaper alternitave..Also as e-85 is cheaper economy is less

Edit:Also you may want to think about diffrent fuel lines and o rings and such but sense your car is newer you may not have that issue

The injectors need to be 25% larger because of the difference in AFR. O rings may be a problem, but generally are OK. You will also need the tune changed on the PCM to reflect the change in AFR between E10 and E85. You wont be able to go back and forth, it'* one or the other unless you swap out PCMs.

The 63.2 or greater lb/hr injectors. 255 fuel pump and rewire. 04 flex tahoe filter, change fuel filter after initial fill-up, again on the next tank, then once a year. Wideband is a must. Tune. Scaled IFR down for injector size on gas than added 35% back to the IFR, then maf tune. Pretty easy actually.