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Service bulletin PIT5550B

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 id10149054
Published by NHTSA2018-11-26
Manufacturer's numberPIT5550B
Manufacturer's date2018-10-29
NHTSA componentSEATS:MID/REAR ASSEMBLY; SEATS

NHTSA's summary

This Preliminary information communicates that an inoperative third row folding seat back may not fold down or up. This information advises dealers on how the seat functions and also a common area where an open circuit may be found between the third row seat module and the seat position sensor. It provides repair instructions if a concern is found with the circuits between the third row folding seat module and the seat back position sensor, as well as advising the dealer to look for bent/damaged seat recline mechanisms.

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

Seats

Vehicles listed
CADILLAC ESCALADE2015, 2016, 2017, 2018, 2019
CHEVROLET SUBURBAN2015, 2016, 2017, 2018, 2019
CHEVROLET TAHOE2015, 2016, 2017, 2018, 2019
GMC YUKON2015, 2016, 2017, 2018
GMC YUKON XL2019

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

Recalls for the same vehicles and component
20212122021-04-09. Seats And Restraints
20185352018-09-26. Seats And Restraints
20182332018-05-04. Seats And Restraints
20144372014-10-07. Seats And Restraints

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
PIT61802024-08-13. Service bulletin. This Preliminary information communicates assistance in locating the Rear seat belt comfort guides in the parts catalog.
06-00-89-029V2024-05-16. Service bulletin. This service bulletin includes information on Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability.
PIT5284A2023-12-04. Service bulletin. Rattle Noise From Second Row Seat.
PIT52842023-12-04. Service bulletin. Rattle Noise From Second Row Seat.
17NA3082021-12-20. Service bulletin. This technical bulletin provides repair information to correct a customer concern of carpet damage, seat mounting stud wear through, hole in second row (Intermediate) carpet.
PIT57452020-08-10. Service bulletin. This Preliminary information communicates and issue with the memory seat module waking up the low speed GM lan bus and causing a battery draw.
17NA3082020-08-10. Service bulletin. This technical bulletin provides repair information to correct a customer concern of carpet damage, seat mounting stud wear through, hole in second row (Intermediate) carpet.
N1922850502020-03-23. Service bulletin. Customer Satisfaction Program - Certain vehicles that had the front passenger seat cushion frame previously replaced, may not have had the adjuster stops transferred and are missing on the replacement part. The front passenger seat may be in a position beyond the occupant design travel range.Dealers are to inspect the front passenger seat tracks for the presence of both adjuster stops and install missing adjuster stops if necessary.
PIT5434D2020-01-21. Service bulletin. This Preliminary Information communication provides information to the technician only to provide additional tips when diagnosing a front heated seat concern and is not meant to be a diagnostic flow chart or replace Service Information. Always, perform and refer to Service Information for the latest diagnostic information and procedures.
18NA3772019-05-20. Service bulletin. This technical bulletin provides repair information to correct a customer concern of front seat lateral movement and/or click type noise while driving.