The latest recalls involve mainly older midsize cars and bring GM's total this year to 29 million, surpassing the 22 million recalled by all automakers last year. The added recalls also raise questions about the safety of ignition switches in cars made by all manufacturers.
GM said the recalls are for "unintended ignition key rotation" and cover seven vehicles, including the Chevrolet Malibu from 1997 to 2005, the Pontiac Grand Prix from 2004 to 2008, and the 2003-2014 Cadillac CTS.
The company is aware of three deaths, eight injuries and seven crashes involving the vehicles, although it has no conclusive evidence that faulty switches caused the accidents.
The vehicles involved are:
1997-2005 Chevrolet Malibu;
1998-2002 Oldsmobile Intrique;
1999-2004 Oldsmobile Alero;
1999-2005 Pontiac Grand Am;
2000-05 Chevrolet Impala and Monte Carlo;
2004-08 Pontiac Grand Prix;
2003-14 Cadillac CTS, 2004-06 Cadillac SRX;
2011-14 Chevrolet Cruze; 2012-14 Chevrolet Sonic;
2013-14 Chevrolet Trax, Buick Encore and Verano;
2014 Chevrolet Camaro and Impala, Buick Regal;
2007-11 Chevrolet Silverado HD, GMC Sierra HD;
2005-07 Buick Rainier, Chevrolet TrailBlazer;
GMC Envoy, Isuzu Ascender, Saab 9-7x;
2006 Chevrolet TrailBlazer EXT, GMC Envoy XL;
CEO Mary Barra said the recalls stem from an extensive safety review within the company.
"If any other issues come to our attention, we will act appropriately and without hesitation," she said in a statement.
The announcement of more recalls extends a crisis for GM that began in February with small-car ignition switch problems. GM recalled 2.6 million older small cars worldwide because the switches can unexpectedly slip from "run" to "accessory," shutting off the engines. That disables power steering and power brakes and can cause people to lose control of their cars. It also stops the air bags from inflating in a crash. GM has been forced to admit that it knew of the problem more than 10 years, yet it failed to recall the cars until this year.
GM's conduct in the small-car recall already is under investigation by the Justice Department and both houses of Congress. Earlier this year, the company paid a $35 million fine to the National Highway Traffic Safety Administration for delays in reporting the small-car ignition switch problems.
On June 18, NHTSA opened two investigations of Chrysler minivans and SUVs as part of a widening inquiry into air bag and ignition switch problems across the U.S. auto industry.
NHTSA began asking automakers and parts suppliers for information on the interrelated issues after GM's small-car recall. NHTSA asked automakers and parts makers for information on switches and how long air bags will inflate after the keys are moved out of the "run" position to "accessory" or "off." In many cases, the answer is less than a second.
That led to the Chrysler inquiries, NHTSA said in a statement. "The agency examined all major manufacturers' air bag deployment strategies as they relate to switch position," the agency said in a statement. "NHTSA will continue to refine its knowledge of these systems."
GM's recalls on Monday bring this year's total so far to more than 40 million for the U.S. industry, far surpassing the old full-year record of 30.8 million from 2004.
The recalls come just hours after the company's compensation consultant, Kenneth Feinberg, announced plans to pay victims of crashes caused by the defective small-car switches. Attorneys and lawmakers say about 100 people have died and hundreds were injured in crashes, although Feinberg said he didn't have a total.
Feinberg said the company has placed no limit on how much he can spend in total to compensate victims.
GM spokesman Alan Adler said that in the Cadillacs, the ignition can slip due to jarring from the road, a bump on the key from the driver's knee or from the weight of a heavy key chain. In the older model midsize Chevrolets, Pontiacs and Oldsmobiles, only jarring or heavy keys - and not a bump from the driver's knee - can knock the ignition out of position.
In all the cases, the ignition switches out of the "run" position and into the "accessory" or "off" position.
Adler said that, unlike GM's previous recall of 2.6 million Chevrolet Cobalts and other small cars, the ignition switch is made to GM's specifications. But the keys can slip too easily. The company will place inserts on the keys to fix the issues.
Adler said GM began investigating all of its ignition switches 60 days ago after the Cobalt recall revealed problems. This recall came out of that investigation.
GM is urging people to remove everything from their key rings until the recalled cars can be repaired.
Of the three people who died in crashes involving the newly recalled vehicles, it's unclear whether those deaths were ignition-related, Adler said. In each of the cases the air bags didn't deploy, but there are many reasons air bags don't deploy, including the angle the car is hit and whether or not the occupants were belted, he said.
Adler said victims in the newly recalled vehicles won't be included in the compensation fund that has been set up for the small-car case.
The Detroit company said it plans to take a $1.2 billion charge in the second quarter for recall-related expenses. Added to a $1.3 billion charge in the first quarter, that brings total recall expenses for the year to $2.5 billion.
GM also announced four other recalls Monday covering more than 200,000 additional vehicles. Most are to fix an electrical short in the driver's door that could disable the power locks and windows and even cause overheating.
Of the 29 million vehicles recalled this year, 17.1 million have been over ignition switches
GM's stock fell 27 cents, or less than one percent, to $36.36 in late afternoon trading.