The latest of General Motors' bad breaks: bad brakes.
The National Highway Traffic Safety Administration says it is studying 1.3 million 1999-2002 GM pickups and SUVs to determine if a defect is causing potentially dangerous corrosion in states with severe winter weather.
Models affected by the study, which could lead to a recall order, are the Chevrolet Silverado, Tahoe, Suburban and Avalanche; the GMC Sierra and Yukon; and the Cadillac Escalade.
NHTSA is investigating reports that corrosion develops under the wheel-speed sensors of antilock brakes, a condition that could increase stopping distances.
GM told NHTSA in November that it was recalling 150,000 full-sized pickups and SUVs in Canada because of brake corrosion. But it said no U.S. recall was planned because fewer failures had been reported in the United States.
NHTSA says it has received 120 complaints about the problem, including 22 reports of crashes and four reported injuries.