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Discussion Starter · #1 ·
I have owned many HD 3/4 tons and 1 ton F350 in the past.
I don't remember hating them as much as I hate driving this 22 Denali 3500.
I am about 10 months into owning the truck
Had it leveled, new upper control arms, Fuel wheels, Nitto Ridge Grappler 35 x 11.50 - 20
Dropping it off at the dealer tomorrow for an oil change and tire rotation.
This truck is stiff and bouncy, feels like the tires are out of round or out of balance.
It is not a pleasure to drive. Every truck I have owned has been leveled with custom wheels and tires.
I am hoping this is just a tire issue. I drove my 2015 2500 Denali for 7 years and didn't really have any complaints.
Is there any hope? looking for insight before I become irrational and just trade it in.
11,000 miles
Wheel Tire Automotive parking light Car Vehicle
 

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Have your tires road forced balanced. Ask them for the numbers. Everything i've read said they should come in under 20. I had a set of BFGs that Discount Tire sold me that RF'd 25-40.
Them suckers would shake the pickup around 45-60 mph, not bad, but enough that you KNOW something is not right. Ended up switching to Nitto A/Ts.

Are the newer Dmax's torsion bars still? Cranking them up is a good way to crank down the ride quality.
 

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What was said above. Leveling a truck by cranking keys is never a good idea for ride quality. Are the shocks extended properly or custom length ones installed? That can make a huge difference also.
 

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Did you have the same issues prior to the installation of the aftermarket wheels, tires and lift kit?
 

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Discussion Starter · #8 ·
What was said above. Leveling a truck by cranking keys is never a good idea for ride quality. Are the shocks extended properly or custom length ones installed? That can make a huge difference also.
The last six 3/4 and 1 ton trucks i have owned have all been lifted or leveled with custom wheels and tires.
I have the new keys and upper control arms that compensate for being leveled.
Have your tires road forced balanced. Ask them for the numbers. Everything i've read said they should come in under 20. I had a set of BFGs that Discount Tire sold me that RF'd 25-40.
Them suckers would shake the pickup around 45-60 mph, not bad, but enough that you KNOW something is not right. Ended up switching to Nitto A/Ts.

Are the newer Dmax's torsion bars still? Cranking them up is a good way to crank down the ride quality.
Good information on the road force balancing.
 

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So for the last 11k miles it drove like you describe? Was it like that when you bought it new before you modified it?
 
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Discussion Starter · #11 ·
It was modified the first week of ownership. It is either progressively getting worse or my ability to cope with it is being diminished. Will see after the tires are checked out, rebalanced.
 

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I have owned many HD 3/4 tons and 1 ton F350 in the past.
I don't remember hating them as much as I hate driving this 22 Denali 3500.
I am about 10 months into owning the truck
Had it leveled, new upper control arms, Fuel wheels, Nitto Ridge Grappler 35 x 11.50 - 20
Dropping it off at the dealer tomorrow for an oil change and tire rotation.
This truck is stiff and bouncy, feels like the tires are out of round or out of balance.
It is not a pleasure to drive. Every truck I have owned has been leveled with custom wheels and tires.
I am hoping this is just a tire issue. I drove my 2015 2500 Denali for 7 years and didn't really have any complaints.
Is there any hope? looking for insight before I become irrational and just trade it in.
11,000 miles
View attachment 1105377



Sent from my iPhone using
For the most part, we have the same set up, however, my 22-3500 DRW ride quality is great, comparing it to my 2020 Denali 2500.

I’m running 22” American force wheels with 35” Toyo’s 12.50. Cognito 3” leveling kit with king shocks.

Upgraded straight from the dealer.
The initial balancing was done using beads, I had vibration issues on and off. I changed to the traditional balancing weights up front and no more issues.
 

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2017 GMC Denali 2500HD, 3.5" Rough Country Lift, 305/55R20 Cooper Rugged Trek, Paragon Bed Cover
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After having the balance checked out, what psi are you running in your tires? What load range are they?

Are you still using the stock shocks? If so, I'd get rid of them for one that is intended for lifted/leveled trucks.

Another thing to try: put a couple hundred pounds in the bed and drive like that. See if it feels different.
 

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2nd the motion for shocks. Also, just because you have new keys, you're still using the same torsion bars, and all keys do is allow you to clock the bars at a different angle for more lift. Any time you crank the torsion bars, their rate will change, that's its intended job. This translates to a higher spring rate, as torsion bars are not linear but progressive.
Similar thing for the rear springs, you have a 3500, they come with a heavy duty spring pack made for carrying heavier loads, such as a 5th wheel or goose neck trailer. Expect a bit more stiffness from the rear.
And shocks! You cannot run stock shocks, especially the crappy Ranchos that come with these trucks, and expect a comfortable ride after what you've done.You have done only a few key parts to the suspension, yet expect a great ride, its not gonna happen until you do ALL of the work to the suspension. Lots of threads on shocks here, both covering stock as well as lifted trucks. I would look at ONLY adjustable shocks at this point, as you'll be able to dial in the ride you are expecting from your vehicle. NOrmally I'd say Rancho9000 adjustables, but with the lift and whatever you plan on towing, Kings would probably be a better choice.
Finally, wheels/tires. What load range are those tires? What is your pressure set at? I'd suggest a slightly lower pressure to make up for the stock shocks, 65psi for E tires, try that and see how it feels on the road. Having E tires at a full 80psi will give you a harsher ride, that's just what happens.
 

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Sharp truck. leveled does change things and make it a bit touchier in my opinion to tire balancing. That may solve your issue right there. I tried beads for the first time on my nitto ridge graps same size as yours on a leveled 10 and vibrations come and go. Next set will be force balanced with weights. 35's just have a ton of mass to compensate so any little un-balance seems to be picked up in the seat easier in the truck. I will say this, these ridge grapplers are the hardest tire i've ever felt on the bumps. Stiff. You could try rotating tires see if something moves or feels different.
 

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Discussion Starter · #18 ·
Sharp truck. leveled does change things and make it a bit touchier in my opinion to tire balancing. That may solve your issue right there. I tried beads for the first time on my nitto ridge graps same size as yours on a leveled 10 and vibrations come and go. Next set will be force balanced with weights. 35's just have a ton of mass to compensate so any little un-balance seems to be picked up in the seat easier in the truck. I will say this, these ridge grapplers are the hardest tire i've ever felt on the bumps. Stiff. You could try rotating tires see if something moves or feels different.
Thanks for the input. The truck is at the dealership today getting an oil change and tire rotation. Going to have them take some tension out of the torsion bars. Will have to see if it's any better later today.
 

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Agree with Stroked: Sharp truck.

If i may give you my two cents... rotating the tires is a TEST, not a solution, for something being awry with the tires. If the test fails (read: rotating mitigates the issue) then the tires need to be replaced.
Otherwise 1) you'll never be able to rotate your tires properly or 2) you'll get to experience the symptoms for [insert tire rotation mileage here] miles every (4*[insert tire rotation mileage here]) miles
 
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