09 Tahoe....Bump steer after adding 20" on- help!

[metelhead]

I recently added some 20" (oem wheels) from 17" and now when I hit bumps I get some pretty bad bump steer...I assume the is from the added weight of the wheels and lower profile tires.

Now my truck only has 6500 miles, but it does not have Autoride, just standard LT shocks. Could it be the OE shocks that are causing this?
As I'm tempted to swap back to the 17" inspite of how much better the 20" look- it just not worth the ride I'm getting.
So what to do- check aligment, camber, caster...etc..??? Have I changed much going to a 20"? Or is this simply a shock issue? Thanks





Side thought- the Autoride(I dont have it , so I don't know) system must work OK, since this what all the trucks with oem 20" have right?

 

[Modded]

17" to 20" wheels should make no difference with alignment issues, the difference in tire diameter is probably around .3", same difference I had when I went from 20" wheel/tires to 24" wheels/tires.
That being said is, worn shocks is most likely your issue.

 

[metelhead]

17" to 20" wheels should make no difference with alignment issues, the difference in tire diameter is probably around .3", same difference I had when I went from 20" wheel/tires to 24" wheels/tires.
That being said is, worn shocks is most likely your issue.

Thanks Modded!
I believe you are right...and even if they aren't worn (since I only have 7K on the truck) the LT shock either have way too much rebound on the front which is leading them to pack up or the valving is just off......it was pretty amazing what those 17" were soaking up....

Bilsteins here I come!