General Motors is pulling key parts of its next V8 engine in-house after a recall of 600,000 trucks. The recall appears to be related to issues with the company's V8 engines, which have reportedly experienced failures, although the specifics of the problems and the recall are not entirely clear. It is also unclear what steps GM is taking to address the issues beyond bringing some production in-house and potentially modifying the engine's maintenance, such as using thicker oil.