Steering Damper was part of my 2015 Silverado vibration at 55-75, balanced also...helped but still there

RWD regular cab. This happens on newly paved perfectly smooth roads. Odd for Illinois I know, but if there are no irregularities to dampen, why would the sucker shudder Due to a bad damper? U-joints are firm, but I really don’t want to put the sucker up on stands and run her up in rpm with a piece of chalk taped near the shaft to check for balance issues. I’ll look into the steering damper, but seems odd it would occur on smooth roads and always the same road speed.
Thanks to y’all

Rotate tires, check your driveshaft u-joints, lift the front end and check your ball joints, check the steering damper.

Ball joints new
u-joints tight
Tires fine, rotated regularly and balanced
vibrates even when coasting at said speeds

Now I'm not a truck guru so bear with me: I look at auto parts stores for steering dampers/stabilizers for replacement and they only show up FOR 4WD!

My inference is they are only put on four wheel drive and that takes it out of the solution category and some of y'all are and idiots.

or

You can no longer buy steering dampers for 2000 Silverado RWD trucks.

OR - one of our fine CP members can provide a link to purchase a RWD damper/stabilizer which y'all say is the freaking problem, as auto zone, advance, napa, and o freakin reilly don't show any for 2WD. (or I am blind and can't see one listed)

thanks for your patience,

jp

People who need and use trucks buy 4x4s. They get you stuck better so that short of a D9 or track hoe can pull you out.

Also, you didn't specify what your truck was so you got many opinions. I will bow out as there is a multitude of possibilities. Maybe Sauto will chime in as this sounds like a problem he could give you a few things to narrow it down.

I will also add since I'm a prick a quick peek under your trucks front end will tell you if a steering damper is there.

If you're absolutely positive it isn't the tires then yea, I suppose it could be the drive shaft. But those things don't just go out of balance, or throw a weight. If you can, put the rear end on jack stands to get the tires off the ground and put the transmission in neutral then crawl under it and spin the drive shaft slowly by hand. What you're looking for is a dent anywhere along it indicating it's been hit by something and bent. It doesn't take much, the tubes used to build drive shafts have surprising thin walls.

What was her name?

You're not really "stuck" until you have to call in the Skycrane.

have them check your driveshaft, mine was cracked.

and to the OP...


does the vibration change on or off the throttle?


at this point i'd start by taking the driveshaft out and making sure the u joints are free. they rust internally on those and try to lock up and then cause a vibration.

ive seen some REALLY ****ed up driveshafts that never caused any vibration lol.


like stuck in the creek, high centered on it and leaving a spiral dent all the way down it ****ed up and no vibration lol