Frame Beaming- GM Campain #PIT3009J - Page 3 - Chevy and GMC Duramax Diesel Forum
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Old 01-21-2010, 06:51 AM   eBay Motors  #21 (permalink)
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According to the bulletin, yes, two each. Not bad if it helps with the ride a bit.
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Old 01-21-2010, 07:48 AM   eBay Motors  #22 (permalink)
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I bought the (2 ea.) upper & lower mounts from gmautopartsdirect.com.
But after taking it apart & comparing old vs. new (see pix on tailgate), all you really need are Upper Mount 25791031 (Qty 2) for about $25 ea. +shipping.
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Old 01-23-2010, 12:57 AM   eBay Motors  #23 (permalink)
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Quote:
Originally Posted by Crusher View Post
I bought the (2 ea.) upper & lower mounts from gmautopartsdirect.com.
But after taking it apart & comparing old vs. new (see pix on tailgate), all you really need are Upper Mount 25791031 (Qty 2) for about $25 ea. +shipping.
Thanks for the tip! I think with shipping, it might be a wash so I might just get it at the dealership.
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Old 02-07-2010, 09:28 AM   eBay Motors  #24 (permalink)
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Before you have determined you have "Beam Rattle/Shake" check out your driveline and all joints, look for separated tires. Save some expense from having had a problem in another area. A separating tire or worn joint will make your head and teeth rattle. Some times people go in the opposite direction to get to the meat and potatoes, lastly, a problem like this could be in the rear cab mounts and I know the General has reviewed this annomally quite a bit and has found a fix. In a lot of cases even folks with single cabs and half tons think they have the shakes but it is related to something else. Look it over close. Our problem was a separated tire and at 45 mph nothing, but at 60mph, the whole world was shaking, even loosened the dowel bolt on the leaf spring pack. WOW!!!
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Old 02-07-2010, 12:27 PM   eBay Motors  #25 (permalink)
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I have been running the the cab mounts for about a month. I can say it made a noticeable improvement. It seems to take out the bone rattling joint out of the ride on expansion joints, R/R Tracks & potholes.
Probably the best $120 (uppers & lowers) I've spent. If you just buy the upper mounts it's only $60.

BTW- Sulastic Shackles cost $340 & now I no longer think I need them.
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EFILive V2 Tuned by IdahoRob, FASS HD-C10-150G,
BANKS Ram Air Intake + Super Scoop, Banks Boost CAC Tube, BD Exhaust Manifold, EGR Blocker, MBRP DP, 4" Turbo-Back Exhaust w/ Aero-Turbine 4040, PCV Reroute, Transgo Jr., B&M Racing Deep Pan, Pure-Power Filter, SunCoast Deep Filter Lock,
Autometer Ultra-Lite II - EGT & Boost in overhead. NCT/Bilstein Shocks, Sulastic Shackles, Kryptonite Tie-Rods, Cognito UCA & Steering Braces, Firestone Ride-Rite Airbags, Reunel Bumper, Open Country M/T, LINE-X, TruXedo Tonneau, Pro-Tech Toolbox, Pioneer FH-P8000BT, i-pod, Focal 165KF Frt & Rear, JL Audio 300/4 Amp, Focal 27KX Subs, Audison Amp, Rattle-Trap Xtreme.

Last edited by Crusher; 02-07-2010 at 12:29 PM.
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Old 03-23-2010, 03:25 PM   eBay Motors  #26 (permalink)
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I went to the GMC dealer here in Redding CA, they wanted over $400.00 to change these out, I just got my parts in the mail from PartsDirect, will be installing them this weekend myself.
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Old 03-23-2010, 03:34 PM   eBay Motors  #27 (permalink)
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On most trucks, you can re-use the lower pads and the washers. That will reduce the cost quite a bit with the same improvement. The lower pads and washers on my 04 were exactly the same as the new from GM.
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Old 03-30-2010, 05:55 PM   eBay Motors  #28 (permalink)
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Angry 2006 GMC 1500 4x4 Sierra Crew Cab

OK I installed the new frame cushions and the vibration at 45-55 is now gone. But I have a vibration at about 65 still, feels kind of the same as the lower speeds did, wondering if maybe the U Joint could be causing this new vibration. I'm really getting pissed at this, GM sold me this truck knowing there was a problem, that is just bad business. I have no patience for vehicle problems. Tomorrow I will have the tires rebalanced and have the truck re aligned
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Old 03-31-2010, 01:07 PM   eBay Motors  #29 (permalink)
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Quote:
Originally Posted by Crusher View Post
I bought the (2 ea.) upper & lower mounts from gmautopartsdirect.com.
But after taking it apart & comparing old vs. new (see pix on tailgate), all you really need are Upper Mount 25791031 (Qty 2) for about $25 ea. +shipping.
Thank you VERY MCH for this information. Just ordered mine!
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Old 03-31-2010, 01:24 PM   eBay Motors  #30 (permalink)
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What I have noticed is the new lower cushion is soft and when the frame bolt is tightened the cushion gets squished and bulges outward, the cushion I removed did not do this. I wonder if the new upper is not as tall as the old upper, causing the bolt to be tightened deeper causing the cushion to become squished. I still got the old lowers at my brothers house, I will remove the new cushions and replace with old and see if it makes a difference.
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