Service bulletin 14121A
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 | 10067280 |
| Published by NHTSA | 2016-05-23 |
| Manufacturer's number | 14121A |
| Manufacturer's date | 2014-03-01 |
| NHTSA component | POWER TRAIN:AUTOMATIC TRANSMISSION |
NHTSA's summary
SUMMARY TO BE PROVIDED ON A FUTURE DATE.
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
| CHEVROLET SILVERADO 1500 | 2014 (the catalog's model; the bulletin names a series or trim of it) |
|---|---|
| CHEVROLET SUBURBAN | 2015 |
| CHEVROLET TAHOE | 2015 |
| GMC SAVANA | 2014 |
| GMC YUKON | 2015 |
| GMC YUKON XL | 2015 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 14V152000 | 2014-03-31. 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.
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| 14876 | 2023-12-18. Service bulletin. 8-speed Transmission Harsh Shift |
| 14730 | 2023-12-18. Service bulletin. Torque Converter Clutch Wear |
| 140730001B | 2023-12-11. Service bulletin. Information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts |
| 140730001 | 2023-12-11. Service bulletin. Information on Transmission Adaptive Functions |
| 17-NA-066 | 2023-07-25. Service bulletin. This service bulletin provides information for automatic transmission Oil Cooler Flush and flow test. |
| 16-NA-130 | 2023-03-08. 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. |
| PIP5621C | 2022-10-17. 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. |
| 15-NA-083 | 2021-09-07. Service bulletin. Recovery Process from a Controller Reprogramming Interruption |