The injection pump went out on my Duramax on the way to work last week. Got a little pissed and went and bought a new truck. So far the only mod is 5% tint all the way around with 60% on the entire windshield. Its a 2013, so finding a tuner for under 1500$ is next to impossible. It'll stay stock until the warranty is gone. Only plans are color matched bumpers, leveling kit, 35x12.50s after these tires are gone, and a LED light bar in the grill.