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Remanufactured engines that fit the 1978 Pontiac Grand LeMans. Each unit below is matched to this vehicle, warranty-backed, and shipped with freight quoted at checkout from Peak Powertrain.
Rule of thumb: a engine replacement is usually worth it when the installed cost stays under 50% of what the 1978 Pontiac Grand LeMans is worth — most units below beat that comfortably.
Based on 3 recent market listings, an engine for a 1978 Pontiac Grand LeMans typically runs $3,076–$3,076, with a median around $3,076.
As a general rule of thumb, an engine replacement on a 1978 Pontiac Grand LeMans (mid-size sedan segment, vehicle value roughly $2,500–$3,000) is usually worth it when the installed cost stays under about $1,250 — roughly 50% of what the vehicle is worth.
Based on vendor-verified fitment data across 4 listed engines, remanufactured and new engines for this model cover the 1964–1980 model years. Always confirm your exact VIN or engine/transmission code before ordering, since fitment can vary by submodel or engine.
