Suggestions..

[Lv4cad]

Vehicle Year: 2004
Vehicle Make: Chevy
Vehicle Model: Silverado
Vehicle Engine: 5.3L
Additional Mods: K&N cold air intake Magnflow exhaust Edelbrock Shorty Headers

Tool: Predator U7193
Revision:

Issue:
No Issue, just wondering which performance tune you might suggest for towing a boat..

[06MonteSS]

if you use 87 octane gas in the truck, then use the 87 octane tune...

if you use 91/93 octane gas in the truck, use the Diablo Tune...

I'm assuming you have a NEW version 7193, on a 9rxx revision - so then do a data log and see where your average fuel trims are at and adjust your injector slope accordingly, to get them around -1.xxx... you can find info about how to do this in the Logging sticky at the top of the GM forum listings...