All Investigations » Investigation RQ06009

Defect Investigation of Fuel Tank Leakage

Subject:	Fuel tank leakage
Components covered:	Gasoline fuel system Gasoline storage Tank assembly Tank assembly filler pipe and cap
Investigations Summary:	This investigation was opened on Dec. 14, 2006. It was closed on Apr. 18, 2007. Certain subject vehicles may exhibit leakage of odor and/or fuelfrom the lower portion of the fuel tank inlet filler pipe (inlet check valve). The inlet check valve (icv) and the fuel tank are joined together using a hot plate welding process for plastic parts. Gm reports that its analysis of field returned parts show evidence of process variations for different manufacturing periods. These variations produced some icv to fuel tank joints with "poor melt flow lines. "odi's analysis of gm's warranty claim data finds more frequent fuel tank replacements in the hotter climate states. This investigation has been upgraded to an engineering analysis (ea07-006) to further assess this matter.
Vehicles Affected by this investigation:	2001 Buick Rendezvous 2002 Buick Rendezvous 2003 Buick Rendezvous 2004 Buick Rendezvous 2001 Pontiac Aztek 2002 Pontiac Aztek 2003 Pontiac Aztek 2004 Pontiac Aztek