Replace GMC Sierra 1500 Pickup Powertrain System & GMC Sierra 1500 Pickup Driveline Products. Explore GMC Sierra 1500 Pickup Drivetrain. Maintaining the drivetrain of your GMC Sierra 1500 Pickup is crucial for optimal performance and longevity. Regular inspections can catch issues like fluid leaks or unusual noises, signaling the need for replacement parts. To extend its lifespan, ensure you're using the correct type of lubricant and adhere to a strict maintenance schedule. When choosing a replacement drivetrain, consider the two primary types available: two-wheel drive for better fuel economy and four-wheel drive for superior off-road capabilities, each engineered with high-quality materials for durability. Installation requires precision, so follow manufacturer guidelines closely or opt for professional fitting to ensure your Sierra 1500 runs smoothly.