One minute Jason Strocchia was rolling in for an oil change, and the next, he was driving home in a brand-new 2025 Duramax. A clean trade, a tempting offer, and a moment of perfect timing.

Tragically, it never did. The 4.5-liter Duramax V8 that was supposed to power the half-ton Chevy Silverado, GMC Sierra, and Hummer H2 fell victim to GM’s late-2000s bankruptcy and was canceled ...