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Service bulletin 12050B

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10245824
Published by NHTSA2023-12-04
Manufacturer's number12050B
Manufacturer's date2014-04-01
NHTSA componentSUSPENSION

NHTSA's summary

Rear Axle Grinding Noise, Vibration - Inspect Rear Axle

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Suspension

Vehicles listed
CHEVROLET EXPRESS2011, 2012
CHEVROLET SILVERADO 15002011, 2012 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2011, 2012
GMC SAVANA2011, 2012
GMC SIERRA 15002012 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 35002011 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON XL 25002011 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON XL 25002012 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
11V0070002011-01-06. SUSPENSION:REAR:AXLE:SPINDLE
20104542010-12-17. Suspension
10V6430002010-12-17. SUSPENSION:REAR:AXLE:SPINDLE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
05-03-08-002J2024-09-20. Service bulletin. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
05-03-08-002J2024-09-20. Service bulletin. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
10-03-10-001G2024-06-18. Service bulletin. This informational bulletin provides information on Wheel Balancer Mounting Instructions.
15-00-89-004G2024-05-15. Service bulletin. This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
PI0430B2024-05-06. Service bulletin. Magnetically Controlled Suspension Electrical Connector Not Seated.
PIT5052D2023-12-26. Service bulletin. Steering Wheel Vibration Or Customers Looking To Add Steering Stabilizer.
PIT5049A2023-12-26. Service bulletin. Rattle Squeak Clunk Bump Noise From Front Suspension.
PIT4954C2023-12-26. Service bulletin. Suspension.
PIT5214F2023-12-18. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer?s vehicles that exhibit vibration conditions without utilizing the support of General Motors Technical Assistance Center. If valid vibration frequency or Road Force Variation data has been collected and a repair attempt does not correct the customer complaint, contact General Motors Technical Assistance Center for further support. For any vehicles that remains unrepaired after being at the dealer for three days or more and a related bulletin or PI is not found, contact General Motors Technical Assistance Center for further support.
PIT5120A2023-12-11. Service bulletin. Stabilitrak/Traction Control OFF With Red Brake Warning Lamp