Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
SB-10-08-50-003B
Service Bulletin/Repair Instructions
GENERAL MOTORS: INFORMATION PROVIDED BY BULLETIN FOR ALL 2012 AND PRIOR GENERAL MOTOR TRUCKS AND PASSENGER VEHICLES REGARDING THE ADJUSTABLE COMFORT AND CUSTOM UPHOLSTERY OF THE DRIVER AND THE PASSENGER HEAD RESTRAINT. *PE
010139002
Service Bulletin/Repair Instructions
SOME CUSTOMERS MAY COMMENT ON EXCESSIVE NOISE FROM THE ENGINE COMPARTMENT WITH THE A/C ON. SOME CUSTOMERS ALSO MAY COMMENT THAT THE A/C SYSTEM IS INOPERATIVE. *TT
000864018A
Service Bulletin/Repair Instructions
SOME CUSTOMERS MAY COMMENT THAT THE REAR DOOR WINDOW IS INOPERATIVE. *JB
00051
Service Bulletin/Repair Instructions
SOME VEHICLES EQUIPPED WITH VACCUM POWER, FOUR-WHEEL-DISC BRAKES MAY HAVE BEEN BUILT WITH A KINKED BRAKE BOOSTER VACUUM SUPPLY HOSE. *TT
3170E
Service Bulletin/Repair Instructions
IPC, INTERIOR LIGHTS AND/OR HEADLAMPS FLICKER. *AK FB2