If it's a 4 wheel drive, you will need to crank the torsion bars to get them to fit the front. If it is a 2 wheel drive, you will need a lift kit. A 3" body lift or a 4" suspension lift should do the trick.
Yes they will. I have 305 24" wheels for my 01 Tahoe. They fit well.
The Chevrolet Silverado has been in production for a number of years. The 2014 Chevrolet Silverado 1500 (2WD Crew Cab) can be fitted with 17 through 22 inch tires. These will require the use custom wheel and tire packages.
brakes are to big to fit 15 inch rims
35" Tires will require a 6" suspension lift to clear with no rubbing. A cheaper alternative is a 3" body lift, and 33" tires, although not as appealing.
1 inch
yes they would I used to have 31s on my 94 and they fit just fine they just rubbed a little
The Rims will fit as long as they are the same number of studs and puting 17 inch rims on will not screw up your speedo as long as the tires you use have the same outside diamiter. If they are the tires that came with the original 2007 silverado they will be the same outside diamiter as your 16" wheels and tires You can also adjust for larger tires on the speedometer with a hypertech controller.
+31
wheels or tires? the wheels are 15 inch the tire size is 235/70/15
No
0.060 inch
Yes with torsions cranked till the truck sits level. Crank it about an inch past level and 33s would look great