Discover GMC Sierra 2500HD Pickup Upper Radiator Hoses & GMC Sierra 2500HD Pickup Top Radiator Hoses In Canada. Order GMC Sierra 2500HD Pickup Radiator Hose Top. Maintaining the upper radiator hose of your GMC Sierra 2500HD Pickup is crucial for engine health; regular inspection for cracks, soft spots, and leaks can prevent overheating. Extend its lifespan by ensuring the coolant is flushed and replaced according to manufacturer specifications. When selecting a replacement, opt for high-quality materials like reinforced silicone or heavy-duty rubber that offer durability and heat resistance. Installation is straightforward, but ensuring a snug fit without overtightening clamps is key to avoiding damage. With the right maintenance and choice, you'll enhance your Pickup's performance and safeguard your engine's cooling system.