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About GMC

It's been more than 100 years since GMC, one of America's most significant truck makers was founded. GMC is a division of General Motors North America. It produces SUVs, pickup trucks, light trucks, and other vehicles. The postwar boom in America was reflected in the sleek new GMC "Dream Truck." The Envoy offers substantial performance and a spacious cabin. The most enjoyable aspect of Envoy is the robust performance of its powerful engine. It visually identifies the number four in the General Motors transmission oil pan. It was first introduced in 1964 under the names "Turbo Hydra-Matic" and "Super Turbine." It is highly sought after by collectors and drag racing enthusiasts. It can be recognized from the outside by the narrow pump hole at the front. The version with a clutch has two electrical connections, while the version without a clutch has only one. This gearbox can be identified by the selected dial. When overhauling the engine, appropriate auxiliary equipment must be used to ensure adequate cooling and torque, fuel and air supply, and emission control of the engine and transmission.

Masterpieces of GMC

The gearbox is not the only THM400 that uses an external 2-pin connector. Other units with 2-pin connectors had an internal pressure switch that was used to control the ignition. All units had a 32-inch output shaft, except for the THM375, which had a 27-inch output shaft. A variant of the THM400, known as the THM375, was the original one with a 27-inch output shaft in the center, similar to the smaller 27-inch output shaft of the THM350. It is identified by the words "375-THM" on the rear panel. The original clutch kits had a smaller number of clutch plates. The closed safety valve system is designed for safety and durability. It prevents oxygen from drying out and damage to the tips. The high-density disc provides maximum performance per pound and reliable operation at high cycles. Robust top control and large through-holes increase energy efficiency. This optimizes strength, vibration resistance, and battery life. The absorbent glass mat is 100% leak-proof because the electrolyte remains permanently in the glass separator instead of flowing freely into each cell.

GMC is built on the philosophy of professionalism. It is evolving to offer more fuel-efficient pickups, crossovers, and SUVs. The HUMMER EV electric truck is designed to be the first super-truck of its kind. It is the next generation adventure truck with zero emissions. The oxygen combination reduces water losses and ensures maintenance-free operation. Heavier and thicker plates mean that 18-month AGM batteries can withstand prolonged deep discharges and possible damage during charging. The positive and negative grid is made of a lead-calcium alloy for maximum corrosion resistance, optimized cycle times, and low water consumption to ensure long battery life. GMC is committed to providing reliable trucks for all through innovation and engineering excellence. As it moves toward better technology and more efficient vehicles, the future holds even more possibilities for it. With so many OEM GMC parts on the market, you can build the car of your dreams. Our experienced team is ready to help you. Only by regularly maintaining and servicing the car's wearing components can it remain in safe driving condition.

Find the GMC Parts You Want at AutoPartsPrime!

If your GMC needs replacement parts and accessories, then you have come to the right place. In our catalog, you will find various options and combinations. With the all-new My GMC Rewards, enjoy all the ways you can earn points, flexible options to redeem them, and surprise benefits along the way. If you're looking to save on GMC repair costs, we encourage you to check on our offers. Our extensive OEM parts and accessories inventory is maintained by experienced professionals who know your vehicle best. So you can trust that you'll get the right part every time you visit our website. When it comes to proper fit and stress-free replacement, you'll never regret using OEM parts.