June 26 (Reuters) - GM is recalling 62,468

vehicles over the risk that a fault in the brake pressure sensor

assembly may allow fluid to leak, increasing chances of an

electrical short, the U.S. National Highway Traffic Safety

Administration (NHTSA) said on Thursday.

An electrical short can generate excessive heat and could

result in a fire, risking injury, NHTSA said. It added that an

underhood fire may occur even when the vehicle is switched off

or possibly unattended.

The defect was caused by the use of an unauthorized chemical

by the supplier of the brake assembly that caused a part to

degrade over time, the agency said.

The recall covers certain 2019-2024 Chevrolet Silverado

vehicles. About 1% of the recalled vehicles are expected to have

the defect.