I have a 2002 GMC sierra,I have had suspension problems ont hsi truck since i bought it 6 months ago.Just minor but to the point its getting aggravating.It drives good but shakes or vibrates when i hit a bump in the road.I 1st thought it was coming from the front an it partly was so this is what i did:
Front tie rods
Front shocks
Front end alignment
Front tires
It is still doing it ,not horrible but still doing it.So saturday i changed the rear shocks an its still doing it.The truck never ever veers from side to side or pulls,the shaking/vibration seems its coming fromt he rear.The mechanic at michel tires said he feels it in the seat an feels like its coming from the rear.It drives very good even at high speeds til i hit a bump then i get that split second shake fromt he rear.I dont know what else it could be except rear tires ,so her eis my question for any expert:
If it drives straight an doesnt veer or pull an drives great til i hit a bump whats the odds it could be a bent wheel or a bent axle or frame.and would some of those things come to light when i got the front aligned? like a bent frame? i am just over thinking .an if something like a frame or axle was bent what would i do? just go with it? have something replaced? not sure how smart it is to spend thousands on soemthing like that even if it was that.Hopin its just tires2002 GMC Sierra suspension problem...?
I just read/answered your other post about this issue; carrier bearing. (this was a little more descriptive on the problem that your having).
It sounds like when your hitting a large bump or pothole, the rear of the truck shimmies somewhat violently for a very short moment (less than 1 second). The rear end of the truck may even kick out to the left or right slightly. This could be a combination of the tires, suspension, and frame flexing.
The only thing you can really do is verify that all of your suspension components are in good working order; spring bushings, shocks (you've already done), everything is tight...
This may not actually be a problem, but just the way the truck is. Keep in mind that you are driving a truck, the suspension is stiffer than a car, and the longer wheelbase and fact that it isn't a uni-body vehicle allows for more frame flex than would ever exist in a car.
I've owned, and own plenty of trucks that ride rough, or have the rear ends kick out on large bumps, or momentary shaking.
