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Posted

GM will not recal the computer for larger than stock. You will have to get a custom tune or god forbid a programmer to do that

Posted

With such a small difference in tire size, does it really matter? Is there any benefit to it?

Posted

With such a small difference in tire size, does it really matter? Is there any benefit to it?

 

His statement is incorrect. GM WILL re-calibrate it but they wont do anything for your particular size yet. The only size they've done right now is 35-36"

 

Only thing is a piece of mind, as long as you're aware you're actual speed is higher that displayed you're fine.

 

Programmer will void warranty even for just tire size because they can not tell a difference between different tunes, just logs as a change. Before anyone says it; GM can't technically void a warranty like that but good luck fighting them for it.

Posted

Thanks for the info! I think I will be better off just leaving well enough alone!!

Posted

Thanks for the info! I think I will be better off just leaving well enough alone!!

 

Just ask your dealer periodically if they can fix it for you. As of now there shouldn't be anything

Posted

A GPS or smartphone will tell you how fast you're going compared to what the speedometer says, then you can adjust accordingly.

 

Sent from my DROID RAZR HD

Posted

I am looking to change the stance of my 2014 silverado 4x4 and have been doing a lot of reading on the topic. I have a few questions I am hoping you all can help me with before I place my order.

 

1) I plan on going with the rough country 2.5 leveling + 1 rear. I park in a parking ramp at work with 7' max clearance will my truck still fit with ease?

 

2) I plan on putting on 20" wheels with +18 offset. For tires I want Nitto Terra Grapplers I am debating on going with either 305/55/r20 P rated tires or 275/65/r20 LT rated tires.

A) Will either of these fit with no rubbing once so ever even at full lock?

B) Which option would give me better ride quality?

C) Which option would give me better mpg?

 

I appreciate everyone's help!

Posted (edited)

I am looking to change the stance of my 2014 silverado 4x4 and have been doing a lot of reading on the topic. I have a few questions I am hoping you all can help me with before I place my order.

 

1) I plan on going with the rough country 2.5 leveling + 1 rear. I park in a parking ramp at work with 7' max clearance will my truck still fit with ease?

 

2) I plan on putting on 20" wheels with +18 offset. For tires I want Nitto Terra Grapplers I am debating on going with either 305/55/r20 P rated tires or 275/65/r20 LT rated tires.

A) Will either of these fit with no rubbing once so ever even at full lock?

B) Which option would give me better ride quality?

C) Which option would give me better mpg?

 

I appreciate everyone's help!

1) with ease..? It will be close I think. I just went in a 8'6 structure today and seemed to be enough room with a 2.5" only Front level. Maybe someone with a RC Kit can get a measurement

2)IF it were nMe I would go with the 305s cause your speedo wont be off as much and the trans will be happier selecting gears

A) seems people with 305s and stockers, rub the front sway but with +18 it would prob clear that but then could possibly make contact with the fender linners.

B) both LT should ride the same. youll Notice the level more

C) thats a toss up since 305s are wider so they have a higher rolling resistance but the 275s are an inch taller but thinner for a lower rolling resistance. It'll come down to weight vs rolling resistance IMO so no real #s to compare. I'd pick which ever ones look better to ya.

Edited by Full Lock
Posted (edited)

RC 2.5 in level installed today. Put the rear at 40inches and the front at 39.5inches vymuhuze.jpg

 

 

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Edited by Rob191288
  • Like 1
Posted

RC 2.5 in level installed today. Put the rear at 40inches and the front at 39inches vymuhuze.jpg

 

 

Sent from my iPhone using Tapatalk

 

Was this on stock tires? If so, can you get me a picture from further away. I'm trying to decide if I like it with the stock tires or if I need to wait until I can afford 33's. Thanks in advance.

Posted

 

Was this on stock tires? If so, can you get me a picture from further away. I'm trying to decide if I like it with the stock tires or if I need to wait until I can afford 33's. Thanks in advance.

Yea it's got the stock 20's on it still. Will prob upgrade once I get the money for it. ysybyvar.jpg

 

 

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