Hello, I am a new member from Tucson Arizona. I have a Victory Red Silverado HD2500 CC, Duramax with 93,000 miles. The truck is stock and is getting pretty good fuel mileage (17.5-18.5 in town, 17-18 Hwy @ 70mph. I am almost out of the engine warrenty an would appreciate some tips on what to add, i.e. tuner, exhaust, etc. to improve performance and fuel efficiency. I pull a small 21' Weekend Warrior Superlite about 20% of the time. The forum is great and I have learned a lot since I found it. Thanks
