u7194-9r16
2009 Silverado 5.3L 4spd Z71 ext cab

Hey guys I was comparing the 87 tune to the diablo tune using 93 octane gas and running at least 60 miles on each tune. They both felt to have the same level of performance (seat of the pants test) except for one critical issue. The diablo tune ...

U7194
9r16
2009 Silverado 5.3L Ext Cab 4spd Z71
All stock

I got the U7194 about 2 weeks ago and finally got it to update to 9r16. I installed the 87 tune and liked it a lot, tires spun from a stop, good throttle response, etc. I got my gas swtiched around to 93 octane and installed the Diablo tune ...

Excellent! Thank you for your quick reply. I'll be picking one up in a couple of weeks.

Just bought a new '09 Silverado 1500 5.3L (FlexFuel w/AFM) 4x4 Z71.
(FYI: I avoid E85 it at all possible)

It is currently bone stock. I'd like to buy a U7194 and run one of the preprogrammed tunes until I add a CAI and backcat, then I'd have a custom tune done for me.

The one thing worrying me is ...