Have a 2009 2500 suburban 6.0 , 6 speed . I pull a car & snowmobile trailer often. The fuel mileage is not so good & power is fair. Talked to friends they said cold air intake & headers, tuner. would appreciate any info on this subject. Would like the best of both worlds , more power , better fuel mileage.
Thanks

 

Power is fair? 353 hp and a six speed? My 08 2500 hits 60 in less than 8 seconds, and pulls strongly right into triple digits. I pull a 6500-lb travel trailer all over the country, including the Rockies, and have always been happy with the engine's power.

You already have a cold air intake. The air box pulls air from the passenger fender. And a cone air filter is less restrictive, which is good for airflow, but less restrictive means less filtering, which is bad because your engine is breathing in more dirt and junk.

A Blackbear tune will definitely help. Tell Justin what you want, and he'll take care of you.

Getting a tune isn't likely to help your mileage. It'll make you much more likely to put your foot into it, which negates any potential mileage improvement. I get 15-16 on the highway, 11-12 driving around town, and 9-10 pulling the trailer.

 

I'm with in the Burbs my 2011 2500 has no problems pulling my boat(5000lbs)or a couple 4 wheelers and side by side. The 2500 had plenty of power and torque.