General Motors Corp. said Friday it would spend $455 million ($15 billion baht) to improve existing production facilities in Thailand and to rework plans for a new diesel engine plant in the country, according to reports.

The company plans to expand its plant in the Tayong Province of Thailand, a region known for the heavy presence of international auto makers’ production facilities, and will also spend about $150 million to build a diesel-engine plant with an annual capacity of 106,000, according to Reuters.

A GM executive in South East Asia said annual capacity would be near 120,000 units after the company completes its retooling process for next generation pick-up trucks and SUVs, according to Reuters.