Relays
for your 2021 GMC Sierra 3500 HD
Relays are found in many places of automotive electrical systems. They're useful for allowing low-amp circuits (which can be attractive for aesthetic reasons) to interact with high-amp systems, such as your car's ignition and headlight lamp switches. At StockWise Auto, you can find the right relays for each type of GMC Sierra 3500 HD system quickly, easily and economically.
One vital relay for your GMC Sierra 3500 HD is the ignition relay. It delivers power to the starter, fuel pump and other fuel system components. If the relay is starting to burn out, your vehicle may have problems starting or shut off unexpectedly. When performing repairs, choose a high-quality replacement for long-term performance and driving safety.