Is an LBZ Duramax still worth buying?

An LBZ Duramax can still be worth buying when the condition justifies the price. Buyers like the platform because it is pre-DPF, has strong aftermarket support, and is often viewed as one of the cleaner Duramax generations to own. The tradeoff is age. You are not only buying an engine; you are buying an older truck with possible rust, worn suspension, tired steering, aging wiring, interior wear, and transmission history that matters. Look for records, stock or well-documented tuning, clean cold starts, no coolant pressure symptoms, no fuel leaks, no major rust, and an Allison transmission that behaves correctly. If the seller is pricing it like a collector truck, the documentation and condition need to match.