The National Highway Traffic Safety Administration (NHTSA) is investigating two consumer complaints that 2007 Chevrolet Tahoes and GMC Yukons caught fire while parked in home garages with the engines off.

The truck owners reported to NHTSA that both homes were badly damaged and two people were injured in one of the fires.

The NHTSA Office of Defect Investigations as open a preliminary investigation of both vehicles that could eventually lead to a recall of the SUVs. The agency estimates as many as 400,000 vehicles would be affected if a defect is identified and a recall ordered.

The General Motors SUVs are not equipped with the type of cruise control system that causes a fire in Ford Motor Co. cars and trucks. Ford has recalled more than 10 million vehicles because of a fire danger.

NHTSA also reported on its web site that a preliminary investigation is under way of 2006 Lamborghini Gallardos following three reports of fires. There are 600 of the Gallardos cars on U.S. roads.