| Feds Investigate Buick Rendezvous, Pontiac Aztek SUVs for Fuel Leak Car and Driver, MI - ... of General Motors's Buick Rendezvous and Pontiac Aztek sport-utility vehicles to see if they may develop a fuel tank leak due to improper welding. ... Buick Rendezvous, Pontiac Aztek SUVs Under Investigation Aztek , Rendezvous SUVs Investigated for Fuel Tank Leak General Motors' SUVs under investigation |