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.
99034A
SOME VEHICLES REGISTERED IN THE STATE OF CALIFORNIA AND EQUIPPED WITH 4.3L ENGINES AND CALIFORNIA EMISSIONS MAY EXPERIENCE A HARD START CONDITION, ROUGH RUNNING ENGINE, A SERVICE ENGINE SOON LIGHT, MISFIRE, NO START, STALLS OR CATALYTIC CONVERTER ODOR. *TT
996101002
SOME CUSTOMERS MAY COMMENT ON NO START, HARD START, ROUGH IDLE AFTER START, SURGE, OR OTHER DRIVEABILITY CONCERNS RELATED TO THE FUEL SYSTEM. *TT
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.