Profile Performance: The automotive aftermarket's best name in LED Lighting and when you're fed up with hyperflash- these are the way to go. Profile is working hand-in-hand with the industry's experts to produce the performance that we all expect. Their FlashPack Relays are the industry standard for a high quality plug n play problem solver. Right Way: Everybody uses wire taps and resistors to resolve hyperflash problems after upgrading to LED bulbs. Nothing wrong with that, but it's more of a band-aid than a fix really. By replacing the actual relay that runs your flasher circuit, you are making the right choice, the most reliable choice, and ultimately - the one that requires no modification to your factory wiring, which is always nice. Controlled: Since the FlashPack is designed specifically for users of LED bulbs in their turn/blinker circuits, the circuitry compensates for the hyper flash, and will allow your signals to blink at a normal rate. Plug n Play: Though the location of your flasher relay may sometimes be hard to get to (often times, under the dash) - once you have access, installation is easy. Just unplug the old, plug in the FlashPack, and you're good to go. No re-configuration is necessary. Compatibility: The EP29 FlashPack Relays are designed to fit many GMC/Chevy vehicles - however, we recommend checking your owners manual and comparing the product photos to the actual unit found in your vehicle to ensure compatibility.