# Service bulletin 14520A

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.

- Type: Service bulletin
- NHTSA id: 10090361
- Published by NHTSA: 2017\-02\-03
- Manufacturer's number: 14520A
- Manufacturer's date: 2016\-03\-08
- NHTSA component: SUSPENSION

## NHTSA's summary

14520A \- SPECIAL COVERAGE \(REVISED TO INCLUDE 2007, AND 2010\-2013 MODEL YEAR CHEVROLET SILVERADO AND GMC SIERRA LIGHT DUTY TRUCKS, ALONG WITH EXPANDING COVERAGE TO CERTAIN U.S. STATES\). SOME 2008\-2009 MODEL YEAR CHEVROLET SILVERADO AND GMC SIERRA LIGHT\-DUTY VEHICLES REGISTERED IN CANADA OR 2007, AND 2010\-2013 MODEL YEAR CHEVROLET SILVERADO AND GMC SIERRA LIGHT DUTY VEHICLES REGISTERED IN OR PREVIOUSLY REGISTERED IN MAINE, NEW HAMPSHIRE, NEW YORK, AND VERMONT OR IN THE CANADIAN PROVINCES NEW BRUNSWICK, NEWFOUNDLAND, NOVA SCOTIA, PRINCE EDWARD ISLAND, ONTARIO, AND QUEBEC MAY DEVELOP A FRACTURED MIDDLE\-LEAF SPRING IN THE THREE\-LEAF REAR\-SUSPENSION SPRING ASSEMBLY, FORWARD OR REARWARD OF THE JOINT TO THE REAR AXLE. THIS CONDITION MAY RESULT IN NOISE, RIDE\-HEIGHT DIFFERENCE, CONTACT WITH A REAR TIRE, AND/OR DAMAGE TO OTHER COMPONENTS UNDER THE VEHICLE. VEHICLES WITH THIS CONDITION WILL HAVE REDUCED LOAD\-CARRYING CAPACITY. IF THE CONDITION OCCURS WITHIN THE TERM LIMITS, DEALERS WILL REPLACE THE REAR SPRINGS.

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Suspension

## Vehicles listed

- 2007 to 2013 CHEVROLET SILVERADO 1500
- 2007 to 2013 GMC SIERRA 1500

## Recalls for the same vehicles and component

- [11V007000](/recalls/nhtsa/11V007000.md), 2011-01-06: SUSPENSION:REAR:AXLE:SPINDLE
- [2010454](/recalls/tc/2010454.md), 2010-12-17: Suspension
- [10V643000](/recalls/nhtsa/10V643000.md), 2010-12-17: SUSPENSION:REAR:AXLE:SPINDLE

## Other bulletins for the same vehicles and component

- [PI0281L](/bulletins/11019516.md), 2025-06-12, Service bulletin: STEERING; POWER TRAIN; SUSPENSION. This preliminary informational \(PI\) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
- [05\-03\-08\-002J](/bulletins/11007936.md), 2024-09-20, Service bulletin: SUSPENSION. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
- [05\-03\-08\-002J](/bulletins/11007935.md), 2024-09-20, Service bulletin: SUSPENSION. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
- [10\-03\-10\-001G](/bulletins/11001766.md), 2024-06-18, Service bulletin: WHEELS; SUSPENSION. This informational bulletin provides information on Wheel Balancer Mounting Instructions.
- [15\-00\-89\-004G](/bulletins/11000119.md), 2024-05-15, Service bulletin: ENGINE; SUSPENSION; POWER TRAIN. 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.
- [PIT5207](/bulletins/10247764.md), 2023-12-26, Service bulletin: SUSPENSION. Service Stabilitrak Message With DTC C0455 and/or C0710 SYM5A After A Sequential Programming
- [PIT5052D](/bulletins/10247705.md), 2023-12-26, Service bulletin: WHEELS; SUSPENSION; STEERING. Steering Wheel Vibration Or Customers Looking To Add Steering Stabilizer.
- [PIT5049A](/bulletins/10247704.md), 2023-12-26, Service bulletin: SUSPENSION. Rattle Squeak Clunk Bump Noise From Front Suspension.
- [PIT5214F](/bulletins/10247352.md), 2023-12-18, Service bulletin: SUSPENSION. 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.
- [PIT5120A](/bulletins/10247065.md), 2023-12-11, Service bulletin: SUSPENSION; SUSPENSION: ADJUSTMENT:AUTOMATIC ELECTRICAL/HYDRAULIC. Stabilitrak/Traction Control OFF With Red Brake Warning Lamp

JSON: [/v1/bulletins/10090361](/v1/bulletins/10090361)

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