dcarl started following Aftermarket Upper Control Arms, 18" inch wheel rim vs 20" inch wheel rim on leveled truck (Looking for pics), 1" hub centric spacers and and 2 others
I recently changed from the stock 20" wheels with LT Tires to 18" wheels with P Metric tires. The ride is much better..
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Only way to get there that I know of is to upgrade the radio and HMI modules which I did a year or so ago through MVI Auto Spa. I still have factory nav because it’s a feature I wanted to maintain but I don’t bother with paying for map updates anymore. I do use CarPlay if I’m navigating somewhere but if I’m just driving I just use the factory nav. there’s more options out now too where you can go to a 12" screen but I don’t have any experience with it.
When I called Eibach, I was told the spring rate on their kit is 10% higher than stock. Although 10% doesn't sound like much it resulted in a stiff ride to the point of glancing off of bumps instead of soaking them up. After about a month of driving, they did soften up some but were still stiffer than I wanted. The coilovers are definitely worth the cost. The truck rides near stock smoothness. Going from 20" wheels with E rated tires to 18" wheels with P rated tires helped a lot too. I've still got the RC UCA's if you're interested in them.
I can tell you that I tried Rough Country UCA's with stock 20" wheels and had contact issues with the wheel hitting the apex on the front of the arm. I later switched out to Cognito UCA's and they did not have any contact anywhere. With a 17" wheel, you may have trouble with any UCA without running a wheel spacer. (Not a lot of diameter to work with). The Eibach springs are pretty fat too which means you need to make sure what UCA's you go with will clear the springs on the down travel. I had the Eibach kit for a couple thousand miles and didn't like it. I'm on Halo Lifts Boss Coilovers now and the ride is very good.
Full Set including Spare Wheel & Tire GMC Sierra OEM Polished Snowflake 20x9 Wheels with Cooper Discoverer AT3 LT285/60R20 Tires. The four main wheels have the TPMS Sensors, Center Caps, Lug Nuts and Rim Locks. The Spare wheel is a little marked up from being mounted under the truck but is fully functional. The tires are in very good condition. I'm located in Acworth, GA. Price is Firm.
Check to make sure you have a good ground connection on the trailer itself. Like the person above said it could be a wire on the trailer that is either broken or intermittently shorting on the trailer frame. Ground connections have a tendency to rust so that would be my first inspection point. It could also be a loose wire in the trailer connector (trailer side).
After updating my iPhone 11 to the latest update and using an “Apple” USB cable my connection problems seem to have been fixed. If you’re not using an Apple cable, you may want to try one to see if that helps.
I've had the snowflake wheel as a spare with a LT285/60R20 tire and there's still plenty of room to spare (pardon the pun).. I recently changed to a new set of wheels and 295/70R18 tires with a spare to match but I haven't put the spare up there yet. I don't think I'll have any issues with it fitting.
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I just installed a set of 18” wheels and 295/70R18 Nitto Terra Grappler G2 tires. I was running Cooper Discoverer AT3 LT285/60R20 on the stock snowflake wheels. I can tell you the ride is night and day different. The only way I could get a half way decent ride from the LT Tire’s was to run them at 35 psi and even then it still felt like I was ricocheting off of bumps. Now the ride feels closer to stock comfort level.
I went with my local Discount Tire and they matched Discount Tire Direct prices. I went with https://www.discounttiredirect.com/buy-wheels/vision-nemesis for $173 EA and https://www.discounttiredirect.com/buy-tires/nitto-terra-grappler-g2 for $287 EA. The tires are non LT and. Between the Wheels and Tires I shaved 15Lbs per corner and you can feel it. As far as the wheels, I wanted something I haven't seen on my color truck yet, and when they got mounted, i really liked them. I would take a look at the specs on the Terra Grapler G2 tires https://www.nittotire.com/light-truck-tires/terra-grappler-g2-all-terrain-light-truck-tire/?gclid=Cj0KCQjwrrXtBRCKARIsAMbU6bEcILw2iyB8CTOqXqLHHZekfJ0_1vIz1e5kdTWZOabJTfrOAr7C3fgaAv5sEALw_wcB. All the tires that don't have LT in the size are "P" rated tires. I can tell from experience from the last couple years that I've have just as many road hazard issues with the LT tires as I've had with the "P" rated tires.
My first recommendation is stay away from 20" wheels if you appreciate a nice ride. I really liked the design of my snowflake 20" wheels on my SLT but when I initially changed from the stock P255/55R20 to P275/60R20 the ride was still pretty good with Bilstein 2" level. Then I put on a set of LT285/60R20 and the ride went to hell. Even after installing Boss Halo Coilovers the ride was much improved but it was like the truck ricochet off of bumps. This weekend I put a set of Vision Nemisis 111 18x9 with 0 offset and Nitto Terra Grappler G2 295/70R18 Tire’s and the ride almost feels like a stock truck!
I have Cognito UCAs on my 15 Sierra with Boss Halo coilovers and the stock 20" snowflake wheels. My coilovers are set at 2" and I have a Zone 1.5" body lift. Before I put the Cognitos on I had RC UCAs and had the same issue as you. At that time my front was set to 3", so i think the higher you go, the more it pulls the wheel in. At 2" on the coilovers it does not make contact anywhere. I'm running a LT285/60R20 tire. Sent from my SM-G975U1 using Tapatalk
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