I bought my 01 L slightly used, and pretty much stock except for 20" Foose Spank 5s.

Tires are Goodyear Eagle GT IIs w/ 275/45/20s all around.

The ride is definately stiff, but I don't mind the harsh ride nearly as much as the bounciness. At freeway speeds, the truck literally chatters my teeth, even on relatively smooth roads.

If I lower the the middle part of the bench seat to use as an armrest, the entire seatback is visibly rattling. If I leave my phone in any cupholder in the truck, I can see and hear it rattling around.

I first thought the tires were out of balance, but during all the bounciness, the steering wheel is relatively steady.

I know the L is a performance truck, but the bounciness seems irregular. If I drove another L on the freeway I doubt the ride would be nearly as bouncy.

Are the 20s to blame, or is there any other part of the truck I should look at?

 

I have an 02 with 20" Foose Spank 5's. I get a lot of vibration, but I think its because the truck is out of allignment and the wheels need to be balanced. Ill be having that done sometime in the next week. Ill let ya know if that solves the problem.

-Mike

 

What are you running for air pressure in the tires, it sounds like you might be running them with a psi thats to high.

Maybee try 34 psi and see if that helps.

 

I'm going to have the tires re-balanced on all four corners and see if that solves my vibration problem.

I checked the tire pressure tonight, 34-36psi all around. Was hoping the tire pressure could be the culprit, but everything was normal.

I'll post an update to my situation once I get the tires balanced.

Other than that, does anyone else have any suggestions?

Thanks.