I just saw this, and it might help...
We do not have access to memos on this end, only technical service bulletins. The only bulletin out about the cab mounts is for a popping noise. If you have the popping noise, the [COLOR=green ! important][COLOR=green ! important]dealer[/COLOR][/COLOR]
is to install insulators in the cab mounts. I have included the bulletin for you below.
You could take the [COLOR=green ! important][COLOR=green ! important]truck[/COLOR][/COLOR]
in and complain about a popping noise and let them install the insulators, they would have to repair the nut inside the body as part of the process and would eliminate you from having to deal with it.
June 22, 2010
Underbody Pop or Clunk Type Noise While Turning or Driving on Uneven Road Surfaces (Install Body Mount Insulator)
2004-2010 Cadillac Escalade, Escalade ESV, Escalade EXT
2004-2010 [COLOR=green ! important][COLOR=green ! important]Chevrolet [COLOR=green ! important]Avalanche[/COLOR][/COLOR][/COLOR]
, Silverado (Classic), Silverado, [COLOR=green ! important][COLOR=green ! important]Suburban[/COLOR][/COLOR]
2004-2010 GMC Sierra (Classic), Sierra Denali (Classic), Sierra, Sierra Denali, Yukon, Yukon XL, [COLOR=green ! important][COLOR=green ! important]Yukon [COLOR=green ! important]Denali[/COLOR][/COLOR][/COLOR]
, Yukon Denali XL
This bulletin is being revised to update the model years. Please discard Corporate Bulletin Number 06-08-61-003D (Section 08 - Body and Accessories).
Some customers may comment on a pop or clunk type noise while turning or driving on uneven road surfaces. This noise can be heard and/or felt at either the driver's or front passenger floor pan area.
Under certain conditions, normal movement between the frame and the #1, #2 or #3 body mounts may cause this noise to occur.
|1.||If the vehicle is equipped with aftermarket (non-GM Accessory) running boards or the running board is mounted using the body mount bolt, remove the running boards prior to test driving the vehicle. This will eliminate the running boards as the possible cause of the noise.|
|2.||Install the J-39570 Chassis Ears to the frame rail at or near the body mounts.|
|3.||Test drive the vehicle to identify which mount is suspect. |
Install an insulator at the suspect mount(s). The insulator should be installed between the upper portion of the body mount and the frame bracket. The #1 mount is the mount located just under the A-pillar. The #2 mount is the mount located just under the B-pillar. The #3 mount is the mount located just under the C-pillar.