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
PIP-4695
Service Bulletin/Repair Instructions
GM: LOSS OF POWER HESITATES ON ACCELERATION. 4.3, 4.8, 5.3, 5.7 AND 6.0 ENGINES COUPLED WITH THE 4L60E OR 4L65E MAY EXPERIENCE A CONDITION OF HESITATES, MISSES OR LOSS OF POWER UNDER ACCELERATION. THE VEHICLE MAY OPERATE AS IF IT IS IN REDUCED POWER MODE. *PE
3340
Service Bulletin/Repair Instructions
LEFT FRONT AXLE SHAFT DIFFICULT TO REMOVE. AXLE DIFFERENTIAL LEAK SEAL SHAFT. *KB
000850014
Service Bulletin/Repair Instructions
SOME CUSTOMERS MAY COMMENT THAT THE DRIVER'S BUCKET SEATBACK MOVES FORWARD ABOUT 25 TO 38 MM (1 TO 1-1/2 INCHES) DURING MODERATE TO HEAVY BRAKING. *TT
00045
Service Bulletin/Repair Instructions
SUBJECT REGARDING FRONT SAFETY BELT COMPLIANCE. *TT
990848001A
Service Bulletin/Repair Instructions
EXPERIENCING WIND NOISE FROM BODY SIDE QUARTER WINDOW. *TT
000601014
Service Bulletin/Repair Instructions
SOME K PICKUP MODELS MAY EXHIBIT A POSSIBLE OIL FILTER DAMAGE OR OIL LEAK FROM OIL FILTER AREA. *TT
990730024
Service Bulletin/Repair Instructions
A CONDITION WITH DRIVELINE VIBRATION / GROWL NOISE. *TT