Service bulletin 14308A
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 | 10090079 |
| Published by NHTSA | 2017-02-01 |
| Manufacturer's number | 14308A |
| Manufacturer's date | 2015-03-12 |
| NHTSA component | POWER TRAIN:AUTOMATIC TRANSMISSION |
NHTSA's summary
14308A - SPECIAL COVERAGE (REVISED PART INFORMATION, SERVICE PROCEDURE AND WARRANTY TRANSACTION INFORMATION). SOME VEHICLES EQUIPPED WITH A 6 SPEED AUTOMATIC TRANSMISSION (RPO MW7), MAY HAVE A CONDITION IN WHICH INCREASED TRANSMISSION OIL COOLING CIRCUIT PRESSURE MAY CAUSE TRANSMISSION FLUID TO WEEP OR LEAK. THIS LOSS OF FLUID OCCURS NEAR THE TRANSMISSION COOLER AT THE CRIMP JOINTS ON THE METAL ENDS OF THE COOLER LINE WHERE IT JOINS THE RUBBER HOSE. THE INCREASED OIL COOLING CIRCUIT PRESSURE IS EXPERIENCED DURING VEHICLE OPERATION AT EXTREME LOW OUTDOOR TEMPERATURES. DEALERS ARE TO INSPECT THE TRANSMISSION OIL COOLER LINES AND REPLACE IF LEAKING.
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 3500 | 2008 (the catalog's model; the bulletin names a series or trim of it) |
|---|---|
| GMC SIERRA 3500 | 2008 (the catalog's model; the bulletin names a series or trim of it) |
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