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The powertrain of your GMC includes the engine, transmission, driveshafts, differentials, and axles. To ensure your truck or SUV generates and delivers full force to the wheels with optimal efficiency, each drivetrain component must be kept in tip-top shape with regular preventative maintenance at your local GMC dealership. Here's an outline of what's involved in good powertrain care. Oil Changes and Engine Tune-Ups As the seat of your GMC's impressive power, the engine must always be well-lubricated with high-quality motor oil. This means routine oil changes twice a year or more. You should also have the engine examined and tuned up once a year. Cooling System Inspections Every component of the cooling system also needs to be professionally inspected once a year. In addition, it's wise to check the condition of your coolant monthly and have it flushed every two years. more Air Filter Replacements When the engine air filter becomes blocked by an accumulation of airborne debris, the cylinders can no longer draw in sufficient oxygen to operate properly. Replace your air filter once a year and check it periodically. Transmission Services The gearbox and clutch transmit the engine's power to the axles and wheels. Automatic transmissions are extremely complex and require yearly inspections. You'll typically need to flush the transmission fluid every 60,000 to 100,000 miles. Driveshaft Inspections The driveshaft is an often-overlooked part of the drivetrain that nevertheless serves a vital function. Ensure your driveshafts are properly lubricated and undamaged with yearly inspections. Differential Fluid Flushes A smaller gearbox exists inside each of your car's differentials that also requires high-quality fluid. You'll need to have your differential seals, gears, and fluid checked once a year. Axle Seal and Bearing Checks The axle seals and wheel bearings at the front and rear of your car need to be checked yearly. You'll occasionally need to replace both seals and fluid. Transfer Case Maintenance With all-wheel or four-wheel drive models, you'll also have a transfer case to maintain. This component transfers power to both the front and rear axles, playing a key role in the drivetrain. If your vehicle has a transfer case, the fluid inside requires flushing every 25,000 miles or so. Schedule Routine Powertrain Care with Us The considerable power and dependable performance of your GMC truck or SUV will continue for many years and possibly even decades with regular service. Allow us to take good care of your drivetrain for you. With routine scheduled maintenance, we'll minimize the risk of parts wearing out or failing prematurely. Visit Vachon Buick GMC in Old Saybrook, CT, to have your truck or SUV's powertrain promptly serviced by experience technicians.

The 2025 GMC HUMMER EV SUV is one of the most outstanding adventure vehicles. Its powerful powertrain and high-end performance can challenge all explorers and environmentalists. more 6 Bold Capabilities of the 2025 GMC HUMMER EV SUV Unapologetic Power Whether you're driving through the downtown or conquering the great outdoors, the 2025 HUMMER EV SUV has the power to take you places. With an electric motor on each axle and a high-capacity battery, the base powertrain provides 570 horsepower and 7,400 pound-feet of torque. A three-motor layout with one front and two rear motors is available, boosting the output to 830 horsepower and 11,500 pound-feet of torque. Personalized Driving With five standard drive modes, you can easily adapt the SUV's dynamics to the road conditions or your driving style. In Normal mode, the HUMMER EV SUV offers balanced power and fuel economy, delivering a comfortable drive on asphalt. For smooth rides on grass, gravel, or dirt, you can switch to the Off-Road mode, which also optimizes driving dynamics for snow-covered roads. The Tow/Haul mode optimizes the torque and power distribution for efficient trailering, while the Terrain mode enables one-pedal driving for precise control in extreme off-road conditions or for rock crawling. You can also configure the various drive systems to suit your preferences with the personalizable My Mode. 4-Wheel Steer The innovative 4-Wheel Steer function syncs the front and rear tires in specific ways to reduce the turning circle, allowing you to perform tight turns. It can also turn the rear wheels in phase with the front wheels, enabling CrabWalk. This model allows you to move the SUV diagonally, so you can easily traverse tight trails or narrow streets. Extract Mode Incredibly capable of getting out of dangerous situations, this bold SUV also comes standard with an Extract Mode. This mode activates the adaptive air ride suspension, increasing ground clearance to 16 inches and enabling water fording at depths of 32 inches, allowing you to drive over tough obstacles, such as water creeks, ruts, and boulders. Available Watts to Freedom While the HUMMER EV SUV is made for the great outdoors, it is also incredibly agile on asphalt. To enhance its on-road performance, the Watts to Freedom mode, which is standard on the 3X trim level, reduces the ground clearance, improving the SUV's aerodynamics. It also provides power bursts when needed, meaning you can enjoy adrenaline-inducing acceleration with a 0-60 mph time of up to 3.5 seconds. Born to challenge the great outdoors yet incredibly agile on streets, the 2025 HUMMER EV SUV is the ultimate adventure vehicle. Visit us today at Vachon Buick GMC in Old Saybrook, CT, to explore it in our showroom or test it on the road.