(April 29, 2011) Federal regulators are investigating inaccurate fuel gauges on 865,000 of the most popular sport utilities built by General Motors from model years 2005 through 2007.

The National Highway Traffic Safety Administration said it had received 668 complaints, including 58 in which the consumer said the vehicle stalled when it ran out of gas, even though the gauge indicated that fuel remained.

NHTSA said preliminary evaluation is looking at 2005-07 Buick Rainiers, 2005-07 Chevrolet TrailBlazer 360s, 2005-06 Chevrolet TrailBlazer EXT 370s, 2005-07 GMC Envoy 360s, 2005-06 GMC Envoy XL 370s and 2005-07 Saab 9-7Xs.

GM is "cooperating with NHTSA," company spokesman Alan Adler said.

According to one complaint, the vehicle stalled while exiting a highway, became disabled and was struck from behind, according to NHTSA.

Most of the complaints have been filed in the past year, NHTSA said.

Source: Media reports