1. Pin your electric fan upgrade directly through the ECU and let it control the fans(ECU does need flashed). 2. Control your dual fan combo and comes wired with 05+GM truck plugs. 3. Avoid triggering your fans or using horrible probe thermostats. 4. Relays are rated at 40 amps, sealed and water tight;No corrosion on the terminals. 5. Effectively helps the fan to cool the engine. 6. OE: 7L5533A226T
