The LQ4 engine found its natural home in GM’s heavy-duty trucks and large SUVs, where strength and dependability were essential. Installed in vehicles like the Silverado 2500HD, Sierra HD, and Suburban 2500, it provided steady power for towing trailers, hauling equipment, and long-distance driving under load. Its torque-focused output ensures predictable acceleration even with significant weight behind it. The engine’s durability allowed fleet operators and private owners alike to depend on it daily, making it a trusted companion for work-oriented vehicles.