GM is currently facing a significant quality control issue related to the atmospheric 6.2L V8 L87 gasoline engine, and can't produce enough replacement parts.
The National Highway Traffic Safety Administration (NHTSA) is investigating reports of defects with GM's 6.2-liter L87 V8 ...
GM has built dynamite small-block V-8s for generations, but they blew up the platform with the supercharged LT5.