[08Canyon]

Or lowering it to pre2011 specs, like the trucks pre2011 that don't rub. It requires a 1/2" breaker bar (or a ratchet if that's all you have) and a socket (either 1 1/8" or 1 1/16"). A short extension is helpful. And a tape measure. Maybe lower it an inch???

And 10 minutes of your time to count the number of turns on the torsion bar bolt. Working in quarter turn segments is suggested. Or marking the flat of the bolt and counting the number of full revolutions.

If you don't have access to the tools, see if your local alignment shop will work with you. Ask them to lower the vehicle then have it aligned by them when they raise it back up. It never hurts to have an alignment anyway - unless you have just had it done in the past couple months.

Last option I can ask....any chance another shop will pass the vehicle. Unless the state blindly fails all 2011 and newer Z71 Colorado/Canyon models.

I think 2011 started the taller stance, perhaps it was the 2009. Either way, just lower it.

 

[jjoet]

If everyone would complain...GM would fix their problem
If I was to lower the bars, then I would need an alignment, which I would have to pay for.
Truck is still under warranty.
GM needs to belly up to the bar and fix the problem they caused

 

[silver10Can]

2009-2012 Z71's had the taller stance with the 17" wheels. Never had a problem with my 2010 rubbing when it was stock, and I put 30,xxx miles on it before I got my lift. :shrug:

Edit: Can you use wheel spacers and still pass inspection? If so, try a set of 1/4" spacers on the front, they're cheap, and see if it stops rubbing.

 

[jjoet]

An update: GM Engineering got the backspacing on the wheels wrong.
Spacers have been mentioned.. but it is unlikely that engineering will sign off on their use due to the liabilities as spacers have their own issues.
Using spacers here makes this a modified vehicle which is a more expensive inspection.

 

[colbyjohnson1994]

An update: GM Engineering got the backspacing on the wheels wrong.
Spacers have been mentioned.. but it is unlikely that engineering will sign off on their use due to the liabilities as spacers have their own issues.
Using spacers here makes this a modified vehicle which is a more expensive inspection.

Since you have e-fan and a v8 radiator, aren't you 'modified' already?

I'm unfamiliar with what classifies as what because I live in South Dakota. If you are already classified that way I would just either do 1/4" wheel spacer =>

or just lower it slightly enough to pass inspection then change it back.

FYI I rub with my 33x12.50R15 (stock 15 wheels) with a Rough Country 2.5" kit. I also rub with my Cooper Zeon 305/50R20's (XD775 wheels) but only on full lock. When I bought the truck it was stock height on Nexan (Cooper) Roadian MT's (Discover S/T) I didn't rub at all even after I lifted it on that same setup. I am assuming that mean's that the backspacing is only wrong on the factory 17's on 2011+?

 

[08Canyon]

Can you just try to lower it and see if the rub goes away? I mean it's been mentioned a few times now and it's rapidly being discounted even as an option. What do you have to lose? You have something better to do with 15 minutes of your day?

 

[jjoet]

Since you have e-fan and a v8 radiator, aren't you 'modified' already?
Suspension and tires are the only things that matters here. we are limited up to 2 sizes larger than factory and no suspension mods, (lifting). Anything over this makes it a modified vehicle.
I could lower it, but it would then need an alignment., which GM won't pay for.
Keep in mind I am still under warranty till January 2017. This is GM's problem to solve. Engineering wont sign off on the use of spacers due to the liabilities, and spacers will also make it a modified vehicle.

. I am assuming that mean's that the backspacing is only wrong on the factory 17's on 2011+?

Correct, the backspacing in wrong on the factory wheels. I have saw several in this area with the rub to varying extents, that haven't been caught yet. But since I got caught, the stations have been notified to be on the lookout.

 

[08Canyon]

The previous model trucks did not rub. A torsion bar lifted vehicle will pull the wheel inward. In your model year, GM 'lifted' the truck slightly, drawing the wheel inward.

The wheel offset is not 'wrong'. The suspension design was slightly altered in that model year. Sure a new wheel would do the trick, however they would have to have a special wheel made to accommodate the vehicle and still keep the wheel tucked far enough to meet mileage standards. The wheel would apply to ONLY the Z71 models.

I seriously believe you got an over zealous tech who performed your inspection. Unless it is in writing, I'm confident it will pass at another station. Of course I do not live there, blah blah blah, but it's doesn't exactly make sense that your vehicle is the only on in history that is about to be denied a registration because the tire rubs.
For all we know, the guy had a bad day. His wife left or his dog died that day.

We are now into the 2nd week of experienced suggestions that are being promptly disregarded. It is not GM's fault. It can be easily corrected, if not even for 2 days then return to current settings. Without lowering the vehicle about 1/2" or 3/4", you need to replace the wheels and/or tires or remove the sway bar. Lowering is the fastest and is free.

I guess about all that is left to say is....good luck?