Worth Tuning??
Thread Starter
Burning Brakes
Joined: Jun 2012
Posts: 784
Likes: 37
From: Severn Maryland
Worth Tuning??
I had a 2007 3LT F55 Coupe for 4 years that I traded in a few months ago for a 2013 GS 3LT. I replaced the exhaust and CAI on the 07 and had it tuned with the DiabloTune. I don't plan on changing those parts on the 2013 because it has the NPP and I read somewhere on the forum where the CAI is better on the LS3 Engines. My question- is it worth it tuning a stock 2013 GS, and if so how much of a difference are you guys seeing? 
Race Director
Joined: Jul 2005
Posts: 12,045
Likes: 3,588
From: Central MO
If it's an auto it's worth tuning it to make the tranny behave how you like it. Beyond that, probably not so much. You will get some horsepower and torque gains, but not a lot for the price.
I had 2 credits left on my HPT so I licensed my 12 GS Centennial vert and have tweaked both the high and low octane timing tables some and am working on the tranny. It's a totally different beast than my 2002 Avalanche so I'm taking it slow so I don't cause any problems. Full throttle 1-2 shifts at 48 mph are a lot of fun!
I had 2 credits left on my HPT so I licensed my 12 GS Centennial vert and have tweaked both the high and low octane timing tables some and am working on the tranny. It's a totally different beast than my 2002 Avalanche so I'm taking it slow so I don't cause any problems. Full throttle 1-2 shifts at 48 mph are a lot of fun!
Thread Starter
Burning Brakes
Joined: Jun 2012
Posts: 784
Likes: 37
From: Severn Maryland
If it's an auto it's worth tuning it to make the tranny behave how you like it. Beyond that, probably not so much. You will get some horsepower and torque gains, but not a lot for the price.
I had 2 credits left on my HPT so I licensed my 12 GS Centennial vert and have tweaked both the high and low octane timing tables some and am working on the tranny. It's a totally different beast than my 2002 Avalanche so I'm taking it slow so I don't cause any problems. Full throttle 1-2 shifts at 48 mph are a lot of fun!
I had 2 credits left on my HPT so I licensed my 12 GS Centennial vert and have tweaked both the high and low octane timing tables some and am working on the tranny. It's a totally different beast than my 2002 Avalanche so I'm taking it slow so I don't cause any problems. Full throttle 1-2 shifts at 48 mph are a lot of fun!
Yes this one is auto trans I still have my Diablo tuner and flashed the 93 Octane tune on the car but it still feels sluggish in my opinion. I have to take it through emissions by the 23rd of next month so I'll do that before I mess with flashing it again. Like you I don't want to mess the car up so I never try to change the settings myself.
