* Chevrolet: This was the most common brand to use the 350 Vortec. Expect to find it in various trucks (Silverado, C/K series), SUVs (Suburban, Tahoe, Yukon), and vans (Express, Astro). Specific models and years varied considerably.
* GMC: Similar to Chevrolet, GMC trucks (Sierra, C/K series) and SUVs (Yukon, Yukon XL) frequently used the 350 Vortec.
* Cadillac: Some Cadillac Escalades and possibly other models from specific years utilized this engine.
* Other GM Brands: While less common, it's possible the engine found its way into other GM brands like Oldsmobile, Buick, or Pontiac models, though less frequently than Chevrolet and GMC.
To find out definitively if a particular vehicle had a 350 ci Vortec, you would need to know the specific year, make, and model, and then consult a resource like a vehicle identification number (VIN) decoder or a parts catalog for that year and model.