Put your trust in your 2009 Silverado 2WD. The distance at the front and back is exactly the same. Installation took about 2-3 hours. There are many reviews on installation help here. The only problem is that the fenders make contact with the axle after only 250 lbs. I suggest changing (cutting) or finding shorter stops. But who really wants to carry a heavy load by dropping a truck? Very happy with the quality and look of the truck.