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The Hands Behind Every Engine

Every Gearhead engine begins with something no computer can replicate — experience.  At Gearhead Engines, our technicians don’t just follow a checklist. They apply decades of hands-on knowledge, precision machining, and pride in their work to every remanufactured engine we produce.  Across our seven national manufacturing plants, we remanufacture thousands of engines, transmissions, and powertrain components daily, each one disassembled, cleaned, machined, and … Read more

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GMC Jimmy, S15 Jimmy, and Typhoon Engines

The GMC Jimmy and S15 Jimmy were trusted compact SUVs known for their rugged dependability, while the rare GMC Typhoon brought turbocharged performance and sports-car handling to the SUV world.  Common Problems  Vacuum leaks and sensor failures  Turbocharger wear on Typhoon models  Intake manifold gasket leaks  Timing chain stretch in high-mileage engines  Cooling system corrosion  … Read more

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Your Guide to Buick Replacement Engines

Your Guide to Buick Replacement Engines: Models, Performance, and Reliable Remanufactured Options Buick vehicles are known for comfort, smooth ride quality, and dependable performance. When the engine starts to fail, replacing the vehicle is not always the best option. A quality remanufactured engine can help extend the life of your Buick at a fraction of … Read more

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Buick Riviera Remanufactured Engine

Buick Riviera Remanufactured Engine The Buick Riviera represents timeless luxury and American design excellence. From its dramatic 1960s curves to the sleek 1990s coupe, the Riviera remains a Buick icon. Its powertrain — typically the bulletproof 3.8L V6 — delivered strong, smooth acceleration. Over time, however, wear and tear can compromise performance. Gearhead Engines restores … Read more

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GMC T6500, T7500, W3500, W4500 Forward Engines

GMC’s T and W-Series trucks represented the brand’s dedication to medium-duty performance, offering diesel and gasoline options for hauling, towing, and vocational work. These trucks were staples for commercial fleets needing dependable power and long service life.  Common Problems  Injector and fuel-pump wear on high-mileage diesel engines  Turbocharger degradation over time  Crankshaft seal leaks under heavy-duty use  … Read more

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GMC Sprint and Suburban Engines

From the car-like Sprint of the 1970s to the family-friendly Suburban SUVs, GMC has delivered versatility and performance across decades. These vehicles embody GMC’s balance of comfort and power, with V6 and V8 options that defined reliability for generations.  Common Problems  Head-gasket leaks over time  Oil pan corrosion in older models  Timing-chain stretching at high mileage  Sensor … Read more

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GMC P15–P3500 Van Series Engines

The GMC P-Series vans served as the backbone of commercial fleets across North America, trusted for decades in delivery, utility, and service work. Known for their rugged chassis and dependable powerplants, they kept businesses moving mile after mile.  Common Problems  Oil leaks due to worn seals and gaskets  Overheating from aging cooling systems  Fuel-system corrosion … Read more

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GMC Yukon Line Engines

The GMC Yukon family delivers premium power in a full-size SUV package. Known for its commanding V8 performance and spacious interior, the Yukon stands as a symbol of capability and comfort.  Common Problems  Lifter tick in high-mileage V8s  Oil consumption over time  Cooling system corrosion  Camshaft and crank sensor issues  Intake valve carbon buildup  Why … Read more

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GMC V1500–V3500 Suburban Engines

Produced from the late 1980s through the early 1990s, the GMC V-Series Suburbans continued a long legacy of utility and comfort. Equipped with reliable V8 engines, these vehicles provided families and businesses with towing power and long-haul dependability.  Common Problems  Lifter tick and oil pressure issues in V8 engines  Cooling system corrosion from extended use  Timing chain stretch in … Read more

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GMC TopKick & Related Lines Engines

The GMC TopKick and its related series (C4500–C8500, G-Series, P-Series, and R/V-Series) were built for serious commercial duty. These medium- and heavy-duty trucks have served in municipal fleets, delivery services, and construction for decades.  Common Problems  Oil cooler leaks under high-load conditions  Turbocharger wear in diesel variants  Injector and fuel pump failures  Overheating from restricted cooling systems  … Read more