Vehicle report
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-54-1
WESTERN STAR: BRAKE SIGNAL OVERRIDES TURN SIGNAL UNDER NORMAL OPERATIONS, DUE TO TURN SIGNAL SWITCHES AND STOP/TURN LAMPS ARE SHARING SAME FILAMENT AND SOME TRUCKS WANT 4 WAY FLASHERS TO OVERRIDE SELF CANCELLING TURN SIGNAL SWITCHES. NO MODEL YEARS LISTED. CONSTELLATION, HERITAGE, 4700, 4800, 4900, 5700, 5900, 6900. *PE
35-7
WESTERN STAR: LUBRICATE WHEEL BEARINGS, REAR DRIVE AXLES. *JS
SB-49-7
WESTERN STAR: EPA07 EXHAUST BELLOWS REPLACEMENT. IF A FAILED EXHAUST BELLOWS ON AN EPA07 ENGINE INSTALLATION, REPLACE IT WITH A NEW STYLE BELLOWS, AND TWO NEW MATCHING CLAMPS. NO MODEL YEARS LISTED. *PE UPDATED ON 6/14/2011. *KB UPDATED 4/20/12. *PE
SB-32-13
WESTERN STAR TRUCKS: THE REAR SUSPENSION AIR-SPRING ASSEMBLY HAS BEEN REDESIGNED. *RM
SB-35-06
WESTERN STAR TRUCKS: INSTRUCTIONS TO REMOVE, INSPECT, AND RESEAL THE LOWER PINION COVER ON THE REAR AXLES. *RM
SB-35-07
WESTERN STAR TRUCKS: INFORMATION ON WHEEL BEARING LUBRICATION IN THE REAR AXLE. *RM
SB-49-8
WESTERN STAR TRUCKS: THERE ARE NEW CGI BELLOWS DUE TO CURRENT ONES THAT ARE PRONE TO FAILURE. *RM
SB-47-10
WESTERN STAR: VEHICLES EQUIPPED WITH AN MBE4000 ENGINE AND AN ALLIANCE FUEL/WATER SEPARATOR MAY HAVE INSUFFICIENT CLEARANCE BETWEEN THE ENGINE MOUNTED FUEL LINE AND THE FRAME RAIL MOUNTED FUEL/WATER SEPARATOR MOUNTING BRACKET. NO MODEL YEARS LISTED. *PE
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.