The recall, announced Thursday, covers certain 2011-12 models and 2007-14 models that were repaired with defective parts. The recall is for U.S., Canadian, Mexican and exported vehicles.
The affected models are Chevrolet Silverado light-duty and heavy-duty pickups; Avalanche, Tahoe and Suburban; GMC Sierra light-duty and heavy-duty pickups; and Yukon and Yukon XL; Cadillac Escalade, Escalade ESV and Escalade EXT.
GM says the ignition lock actuators may be too wide, making turning the key difficult when it's hot inside the cab. No crashes or injuries have been reported.