highroller54
New member
- Joined
- Mar 21, 2008
- Messages
- 42
Hi, I am looking for some info for one of my good customers, he has a 07 lbz 4x4 and wants better fuel millage. I am not a duramax guy so I could use some help. Hes thinking programmer and exhaust. Whats my best direction for this? Thanks! Chad.