Sierra Bounce

dcovell · August 23, 2007

I just purchased a 2007 Sierra with the new body style (appears that everyone here refers to it as NBS) and I did some short test drives before buying it but never noticed the horrible bouncing. I live in San Diego and on several of the freeways the bouncing is so bad that it shakes my whole body and practically gives me a headache!

I read a few post on this on the Internet including this board but there does not seem to be a good answer. I lowered the air in my tires a bit and that did not seem to help much, if any at all.

Are better shocks the answer, can something be modified in the suspension? I have had the truck for less than a week and am already regretting it, just about wished that I got a F-150.

My 2001 F-150 is a 4x4 and rarely ever has bounce, this is a brand new 2007 with a completely redesigned suspension, did GM f**k up?

VMax2007 · August 23, 2007

I just purchased a 2007 Sierra with the new body style (appears that everyone here refers to it as NBS) and I did some short test drives before buying it but never noticed the horrible bouncing. I live in San Diego and on several of the freeways the bouncing is so bad that it shakes my whole body and practically gives me a headache!

I read a few post on this on the Internet including this board but there does not seem to be a good answer. I lowered the air in my tires a bit and that did not seem to help much, if any at all.

Are better shocks the answer, can something be modified in the suspension? I have had the truck for less than a week and am already regretting it, just about wished that I got a F-150.

My 2001 F-150 is a 4x4 and rarely ever has bounce, this is a brand new 2007 with a completely redesigned suspension, did GM f**k up?

Can we see pics of your bed bouncing Tundra....oops, I mean "Sierra"....Nice try!!!

2007 GMC HD · August 23, 2007

I have the NBS 2500 HD regular cab long bed and mine rides beautifully. Fact is everyone who rides in it comments on how smooth the ride is. Tell the state to fix your roads

bryanhunt · August 23, 2007

I just purchased a 2007 Sierra with the new body style (appears that everyone here refers to it as NBS) and I did some short test drives before buying it but never noticed the horrible bouncing. I live in San Diego and on several of the freeways the bouncing is so bad that it shakes my whole body and practically gives me a headache!

I read a few post on this on the Internet including this board but there does not seem to be a good answer. I lowered the air in my tires a bit and that did not seem to help much, if any at all.

Are better shocks the answer, can something be modified in the suspension? I have had the truck for less than a week and am already regretting it, just about wished that I got a F-150.

My 2001 F-150 is a 4x4 and rarely ever has bounce, this is a brand new 2007 with a completely redesigned suspension, did GM f**k up?

Its the san diego freeways. I used to drive I15 from san diego to la jolla every day. You have the wrong wheelbase for the freeway and the expansion joints are causing it to jump all over the place. I'd try to see what speed is the worst and what is the best. The trucks are smooth as silk over some of the roughest roads ice/salt cracked and pot hole ridden roads in the midwest. The problem is you're dealing with a very consistant set of bumps that can do a multitude of different things from simple bucking to full blown resonance. As mentioned try different speeds or about 200 pounds in the bed.

I have the NBS 2500 HD regular cab long bed and mine rides beautifully. Fact is everyone who rides in it comments on how smooth the ride is. Tell the state to fix your roads

San diego is all concrete highways. Very expensive, and very nice... if you have a sportscar.

-Devil- · August 23, 2007

hmm i haven an 07 nbs silverado ex cab ... even on the roads in louisiana ... i haven't had any bad bouncing ... the only time i have felt anything unusual while driving .. is when i take a curve to fast (still learning that i am in a truck now) .. and the rear starts to slide a bit in the curve...

but i have had a car that when i was on the interstate in north louisiana (I 20 for the ones that live here) ... it was the right size, that if i did the speed limit it would start bucking and such from the joints in the roadway .. i either had to go under the speed limit .. or over it ... not much can fix that ...

04z71steve · August 23, 2007

its the road, theres nothing you can do about it really, its the combination of the wheelbase and the way they made those freeways, we have a couple newer freeways around here that my truck does that on, but other than that.. my truck rides like a dream, the only thing you can really blame it on is the roads...

and just to prove that theres nothing you can do about it, my mom has an 03 suburban with autoride (aka it rides on airbags) if airbags cant fix a crappy ride... nothing can... but thats just my .02...

steve

Mark_in_Tulsa · August 23, 2007

I just purchased a 2007 Sierra with the new body style (appears that everyone here refers to it as NBS) and I did some short test drives before buying it but never noticed the horrible bouncing. I live in San Diego and on several of the freeways the bouncing is so bad that it shakes my whole body and practically gives me a headache!

I read a few post on this on the Internet including this board but there does not seem to be a good answer. I lowered the air in my tires a bit and that did not seem to help much, if any at all.

Are better shocks the answer, can something be modified in the suspension? I have had the truck for less than a week and am already regretting it, just about wished that I got a F-150.

My 2001 F-150 is a 4x4 and rarely ever has bounce, this is a brand new 2007 with a completely redesigned suspension, did GM f**k up?

Can we see pics of your bed bouncing Tundra....oops, I mean "Sierra"....Nice try!!!

What?

Draenor · August 23, 2007

I just purchased a 2007 Sierra with the new body style (appears that everyone here refers to it as NBS) and I did some short test drives before buying it but never noticed the horrible bouncing. I live in San Diego and on several of the freeways the bouncing is so bad that it shakes my whole body and practically gives me a headache!

I read a few post on this on the Internet including this board but there does not seem to be a good answer. I lowered the air in my tires a bit and that did not seem to help much, if any at all.

Are better shocks the answer, can something be modified in the suspension? I have had the truck for less than a week and am already regretting it, just about wished that I got a F-150.

My 2001 F-150 is a 4x4 and rarely ever has bounce, this is a brand new 2007 with a completely redesigned suspension, did GM f**k up?

Can we see pics of your bed bouncing Tundra....oops, I mean "Sierra"....Nice try!!!

What?

+1

VMax2007 · August 23, 2007

Sorry for my skepticism. But I am seriously suspicious about the OP of this thread since there are multiple threads about the serious ride issues (bed bounce) that the new 07 Tundra is experiencing. So much so that Toyota has even acknowledged the issue and is working on a "fix" for the problem. You can see most of these over at TS (TundraSolutions).

Tundra owners are replacing shocks, modifying suspension components, adding bed bladders to the beds for weight and Toyota dealers are even selling these bed bladders until Toyota comes up with a permanent fix/retrofit.

Sorry, but I choose to believe that this is merely a Troll that is upset about the Tundra's issue. If I am wrong, I apologize, but I don't think I am.

http://www.tundrasolutions.com/forums/tund...nia-bed-bounce/

slimjim2525 · August 23, 2007

My truck rides absolutely smooth as silk.

Bostonsfavson · August 23, 2007

VMax2007, let's not jump to any conclusions here about the OP. Edmunds.com full test of the 2007 NBS Sierra Denali mentions the same problem: "At the same time, the mix of low-profile tires and a heavy-duty truck suspension is always an uneasy one. This is particularly apparent on California's concrete freeways where the rear end can bounce along with the undulations to produce an agonizing harmonic that makes it impossible to have a conversation inside the cab."

It should be said however that I've never personally experienced such a sensation in my Denali. But then again, I don't drive on the same roads.

dcovell · August 23, 2007

Well I ain't moving! Just have to figure something else out. Like different shocks or different tires/tire pressure. It is just that I have never been in a truck that does it this bad. Still has anyone tried one of the aforementioned and it has helped?

z85violator · August 23, 2007

what brand of tires came with the truck? what psi are you running? are they the 20's with low pros?

throw some weight above the rear axle (100lbs) and see if that smooths it out.

bryanhunt · August 23, 2007

Short of completely retuning the suspension (which will make it s**t anywhere else) there is nothing you can do if you're unwilling to change the speed at which you're driving on those roads.

Edmunds mentioned it but it wasn't the truck it was the roads. I drove those freeways for years, they're terrible on long cars even in a continental they're pure hell.

dcovell · August 23, 2007

After reading the entire thread (link above) on the Tundra site, everyone agrees that it is the roads, mostly the freeways in Southern California. So Cal trans is really to blame but they are not going to do much if anything about it as the state is broke to begin with and traffic just gets worse everyday.

I am going to try more weight in the back, if that works maybe put some lead in the tailgate so that it looks nice and clean and it is as far back as possible. I assume the tailgate is somewhat hollow.

I have the General 245x17 tires and originally had them at 38 lbs and then lowered them to about 32 lbs with a little improvement. I found that about 68MPH one the 15 worked fairly well, when I drove at 75 or 80 it got so bad that I though I would bounce out of my lane!

I am willing to spend money on different shocks and eventually new tires but only if there will be some improvement.