House Energy and Commerce Committee Chairman Fred Upton of Michigan says the National Highway Traffic Safety Administration received a large number of complaints about the problem during the past decade.
But GM didn't recall the 1.6 million cars worldwide until last month.
Ignition switches on older-model Chevrolet Cobalts and five other GM models can shift from the "run" position to "accessory" or "off" without warning, shutting off the engine and turning off power-assisted steering and brakes.
The problem also can stop the front air bags from inflating in a crash. GM says 13 deaths and 31 crashes have been linked to the problem.
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Congress passed legislation in 2000 requiring automakers to report safety problems quickly to NHTSA. The laws came after an investigation into a series of Ford-Firestone tire problems.
Upton said in a statement that the committee wants to know if GM or the agency missed something that could have flagged the problems sooner.
"If the answer is yes, we must learn how and why this happened, and then determine whether this system of reporting and analysing complaints that Congress created to save lives is being implemented and working as the law intended," Upton said.
NHTSA already has demanded information from GM about when it knew of the problem. The company could be fined up to USD 35 million if the agency finds it responded too slowly.
Automakers are required to report safety problems to NHTSA within five days of learning about them.