This is a sources sought notice for a diesel engine assembly for the M915A3 Tractor Truck, not an active solicitation. The total potential quantity is up to 22 units. To be eligible for future contracts, a company must first complete a qualification process to become an approved source, which does not guarantee business. The notice directs interested parties to specific Army websites for details on the Source Approval Program and request package requirements. No specific budget, performance location, or solicitation timeline is provided.