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Discussion Starter · #1 ·
The "2.5in GM Leveling Lift Kit (07-17 1500 PU)" will provide 2.5 " of lift in the front, and 1 extra inch in the back (due to the swap from 1 inch stock to 2 inch block. This will give the truck 1 inch of rake from the front to back?

Will running an aftermarket wheel with a negative offset allow me to fit bigger or smaller tires, than the stock wheels would (with the RC kit installed)?

I don't know if its possible but I would like to fit 275 or 285/ 65 R 20, or something pretty close.
 

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I'm not sure on the wheels, but with my experience you don't always get the complete amount of lift that the kit specifies it is for. For example I put a 1 inch spacer on the front of my truck and I ended up with 3/4 of an inch lift when it was all said and done. Even though I'm going to lift it again, I always subtract roughly a 1/4 of an inch off of the kit I'm buying.
 

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A 275/65R20 is a 34.1x10.8 inch tire. The 285 is closer to a 34.5x11.2 inch tire. Stock should be a 275/55R20 if you got stock 20s. Thats a roughly 31.9 inch tire. I'm not 100% on the newer generations but I think that's a bit too large for just a level. I believe with a level kit you are only going to be able to run mid 33s without getting into body modification.
 

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Discussion Starter · #4 ·
Is the clearance different on the newer generations than the 2016. I only ask because I had right at 34" on my 2006, and the tire place just torqued the torsion bars a little bit I think. I'm hoping if I go with something a little narrower than what most people are running I can go up in diameter a little bit.
 

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I would stick with 33's on a 2.5" lift. Also, the rear end of your truck already sits about 1"-1.5" higher than the front so adding 1" to the back (with the blocks) will even it out with the 2.5" added to the front. Goodluck.
 
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