2500HD vibration.

kw/00 wrote:
Got the famous bounce on mine around 47 mph.... Dealer said that I need new body mounts due to the frame beaming... Oh well about 100.00 to fix when I get the spare time... Very common issue on that truck. I test drove a 03 duramax a few months back and it was really bad.

Can you buy the new mounts and the dealership? Is that $100 for parts or labor included?
Glad to hear someone else say it's common seeing how I just drove it home tonight !!!

Full tank of gas and it's barely noticeable.

Got the famous bounce on mine around 47 mph.... Dealer said that I need new body mounts due to the frame beaming... Oh well about 100.00 to fix when I get the spare time... Very common issue on that truck. I test drove a 03 duramax a few months back and it was really bad.

220k miles on 2 2500hd's and never had or heard of it. As mentioned above look at all the rolling stock/u joints and carrier bearing if it's a LB.

I would take it to a GM dealer before buying the truck. It could be nothing, or it could be thousands to fix it right. You need to find out before you spend lots of money on a nice truck.

It was fairly bad until they re balanced the tires. I forgot to say it has brand new 285/75/16's on it and they are off brand. I just want to make sure it's nothing major. This car lot has a VERY good reputation in this area of selling quality vehicles. They also have another CC SB that he says does it slightly as well.

Is feels EXACTLY like the "frame beaming" description above.

I test drove an '05 Denali (used car dealer) with a vibration like that right to the GMC dealer. They pulled the service history on it and it had several records(under the warranty period) for repairs to the drivetrain. Evident it was an ongoing issue. Drove back to the used car dealer and told him what I found. He denied knowing anything about it. I passed on it. Just as well, since I did some reading about payloads after that one and opted to go with a 3/4 ton. Proceed with caution.

Found this thread. Problem is there are many issues that can cause the vibration you describe, driveshaft is only one of them. I would take it for another test drive on concrete vs asphalt as described below, and if possible, put some weight in the bed and see if it goes away. If it is beam shake, you might get the dealer to put on the revised body mounts as part of the sale (assuming you are buying from a dealer). If it's not beam shake, then you have a "fixable" problem that should be addressed before you take delivery.

I wouldn't steer away from the truck if all else is OK, just know what you're dealing with before you sign on the dotted line.

GM Campaign #PIT3009J: Suspension Vibration Or Frame Beaming At 40-60 MPH (64-80KM/H) - keywords front rear shake shock spring tire - (Sept 18,2008)""


Condition/Concern:

Beam shake vibration is usually felt and occurring at speeds between 40-50 mph (64-80 km/h). Hertz readings using an EVA tool are normally bewtween 8-24 HZ. This condition is most common on extended cab and crew cab models but has also been noted in other models.

Recommendation/Instructions:

The severity of the beam shake may vary from vehicle to vehicle. To determine if the concern is beam shake, please perform the following:

1. Test drive vehicle to confirm the condition. A beam shake condition will usually respond to concrete type pavements more than asphalt, so the vehicle should be driven over both surfaces if possible.

2. Place 200-500 pounds in the pickup bed between the closed tailgate and the wheel wells. A beaming condition should dissipate.

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If the concern is determined to be beam shake, this a characteristic of the vehicle. GM Engineering has released updated body mounts to reduce this concern for the Crew and Extended Cab Models. There will be no changes made to the Regular Cab Models.

Had a 2005 Silverado 2500 HD CC SB SRW for 3 years with no such vibration problem. Actually no problems at all.

Randu nailed it IMHO. Carrier bearing it the vibration is speed sensative and you say it is.

Does the vibration feels like its coming up from the floor?
My guess is u-joint or mid ship bearing. Both easy fixes.
Randu