Affected Component: ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

Date Published
OCT 01, 2009
NHTSA TSB #
10032451
TSB Document
  • Sorry, the NHTSA has not posted this TSB document yet.

You can still get the detailed info from GMC for this TSB. Call your local GMC dealer's service department & ask for a copy of TSB# PIP-4714.

Summary
CHEVROLET/GMC: SHUTTLE BUS GENERATOR MODIFICATION P0621. DEALER MAY ENCOUNTER CONCERN OF A SES LIGHT ON WITH DTC P0621 FOUND. MANY CASES THESE VEHICLES ARE USED IN A SHUTTLE BUS APPLICATION. SOME UPFITTERS OF THE SHUTTLE BUSES ARE ORDERING THE VEHICLES WITH DUAL GENERATORS AND REMOVING ONE OF THE GENERATORS TO INSTALL AN ADD ON AIR CONDITIONING COMPRESSOR. *PE