I have a 2005 RR HSE and when doing about 70 MPH on the freeway,
when you hit a bump the rear end wants steer right or left it is very unsettling to say the least.
Has anyone had this problem, and what was done to correct it.
I jacked up each wheel and pulled at 3 to 9 and 12 to 6 no obvious movements
Truck has 63K miles. and is running in the freeway mode at 70 MPH,
otherwise the airbags all seem to be working no leakis.
Both of the rear shocks are dry,
I have not been able to test the shocks to see if one or both are blown or weak/
Thanks for your thoughts, Stan

 

It could be a rear wheel alignment issue.

 

check the tires. mine did that in another vehicle due the tires being worn. That is if you haven't checked them already. Only happens at high speeds right?

 

the tires are good and the rims are the 20 inch lux wheels all pressures are good .
What it feels like is a loose suspension connection as the rear of the truck wants to steer in either direction, i really need to have someone drive along and observer the wheels to see if they are flapping up and down when the truck hits a bump, i am going to install a new set of shocks .
I tried to remove one of the rear wheels and its stuck so I loosened the bolts and have to go for a slow drive to break the bonds

 

anyway I fixed this issue.

I removed the rear shocks and found the right shock would not extend to full length,
and was weak to compress compared to the new unit.
I replaced both rear shocks, and the ride is great,
nice and controlled,
new shocks at the dealer were 258.00 each,
and there is a thin gasket thats on each shock tower dont forget to swap that over

 

Thanks for telling us how it was fixed. Not a lot of people do that and leave us here to wonder what happened .

 

I am glad the shocks fixed the issue, it was pretty scary the first time it happened, as i just bought the truck and was driving it 950 miles back to home base.