# Service bulletin PIT5477A

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: 10113293
- Published by NHTSA: 2017\-08\-15
- Manufacturer's number: PIT5477A
- Manufacturer's date: 2017\-01\-05
- NHTSA component: SUSPENSION

## NHTSA's summary

This Preliminary Information communication provides information to the technician about vehicles that may have a squeak, clunk, or knock type noise from the front suspension when hitting bumps. Technician will need to test drive the vehicle to duplicate the concern. Check the upper strut mount area with chassis ears verifies that the noise is noticeable in that area. Technician will replace the jounce bumpers with part number 8457475.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10113293-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10113293-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Suspension

## Vehicles listed

- 2015 to 2016 CADILLAC ESCALADE
- 2015 to 2016 CADILLAC ESCALADE ESV
- 2015 to 2016 CHEVROLET SUBURBAN
- 2015 to 2016 CHEVROLET TAHOE
- 2015 to 2016 GMC SIERRA 2500
- 2015 to 2016 GMC SIERRA DENALI
- 2015 to 2016 GMC YUKON
- 2015 to 2016 GMC YUKON XL

## Recalls for the same vehicles and component

- [2016190](/recalls/tc/2016190.md), 2016-04-28: Suspension
- [16V256000](/recalls/nhtsa/16V256000.md), 2016-04-28: SUSPENSION:FRONT:CONTROL ARM

## 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.
- [18\-NA\-315](/bulletins/11017424.md), 2025-05-01, Service bulletin: SUSPENSION. This service bulletin advises the tech to only replace the shock that is bad and not all shocks.
- [05\-03\-07\-009L](/bulletins/11015409.md), 2025-03-08, Service bulletin: SUSPENSION; WHEELS. This service bulletin provides information on Wheel Alignment Specifications, Requirements and Recommendations for GM Vehicles.
- [21\-NA\-138](/bulletins/11014358.md), 2025-02-19, Service bulletin: SUSPENSION. This service bulletin provides a repair procedure to correct a customer concern of a Squeak, Grind or Clunking Noise from Rear Leaf Springs.
- [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.
- [PIT5349](/bulletins/10252159.md), 2024-04-01, Service bulletin: SUSPENSION. MagneRide Rear Shocks Not Interchangeable Left To Right.
- [PIT5287A](/bulletins/10248469.md), 2024-01-08, Service bulletin: ELECTRICAL SYSTEM; SUSPENSION. Front Shock Electrical Connector Terminal Removal.

JSON: [/v1/bulletins/10113293](/v1/bulletins/10113293)

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