Chevrolet Silverado 3500 2008 — technical service bulletin
Bulletin 14308A · NHTSA communication 10090079 · issued Mar 12, 2015
Technical service bulletin
communication type
Power Train
component
2008
model years
2
vehicle entries
Official 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
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.