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Service bulletin 15667

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 id10089882
Published by NHTSA2017-01-30
Manufacturer's number15667
Manufacturer's date2015-08-20
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION

NHTSA's summary

15667 - SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO CHECK AND ADJUST TRANSMISSION FLUID LEVELS ON THE VEHICLES LISTED ABOVE. THESE VEHICLES MAY EXPEL EXTRA TRANSMISSION FLUID OUT OF A VENT FITTING AND HOSE ON THE TOP OF THE TRANSMISSION.

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

Transmission and driveline, Automatic transmission

Vehicles listed
CADILLAC ATS2016
CADILLAC CT62016
CADILLAC ESCALADE2015, 2016
CADILLAC ESCALADE ESV2016 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET CORVETTE2015
CHEVROLET SILVERADO 15002015 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002015 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002015 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON DENALI2015, 2016 (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
14V1520002014-03-31. POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES

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
148762023-12-18. Service bulletin. 8-speed Transmission Harsh Shift
15NA0452023-12-11. Service bulletin. Rattle Noise Heard From Engine Bell Housing
140730001B2023-12-11. Service bulletin. Information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts
1407300012023-12-11. Service bulletin. Information on Transmission Adaptive Functions
17-NA-0662023-07-25. Service bulletin. This service bulletin provides information for automatic transmission Oil Cooler Flush and flow test.
16-NA-1302023-03-08. Service bulletin. This service bulletin provides information for after installation of a replacement upper valve body, the transmission may have no Reverse and no 2nd gear.
PIP5621C2022-10-17. Service bulletin. This Preliminary information communicates to the dealer technician that TAC recommends the utilization of the GDS2 software to aid in diagnosing automatic transmission concerns. TAC is requesting the GDS2 session logs be sent in before the dealer contacts TAC.
21NA1992022-02-14. Service bulletin. This informational bulletin advises the technician to replace the TBV if the transmission has any type of repair even if no problem was found, to replace the tbv.
15-NA-0832021-09-07. Service bulletin. Recovery Process from a Controller Reprogramming Interruption
06-00-89-031D2021-09-07. Service bulletin. OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification