Hello, I'm new to the forum, reason i'm here I googled econo chip for a 2004 full size suburban. I chose this forum and thought I'd give it a shot. My Suburban is a great rig , w/ 5.3l engine it gets 14.1 mpg, I put a K&N on it, now it gets 14.2, any ideas?

 

Welcome to the forum..
There are many performance options available and some do include economy modes but for what you spend on upgrades you will never recoup in fuel economy..ever.

Using a full synthetic oil and regular preventive maintenance, good driving habits and driving at posted or slower speeds will yield the best results....

You can break most laws but not the laws of physics, to get the towing capacity and vehicle size you have, it comes at a cost..

 

+1

You might check Blackbear Performance to see if he can do an economy tune.

 

Maybe an exhaust, but I would be weary of a chip and what it would do to your engine.

 

Posting on threads that are eight months old is a waste of time.