Purchased the alternator for an 01 Sierra that has full air ride with two compressors, a 4,000 watt stereo system, a walbro 450 fuel pump, electric double fans for engine cooling, three gauges on the drivers side pillar that are backlit plus what they are monitoring fuel pressure, air to fuel, boost. Not to mention air ride switches, valves , LCD air pressure display on the dash. LED lights everywhere, xglow color change headlights , alarm system, the has shaved door handles so the door poppers and solenoids to open the doors. I'm sure I'm leaving something out. That being said this alternator has performed excellent so far. I have only one battery, it is a large optima yellow top, but still no headlight flicker or dimming. Stereo turned up bass all the way up on the four JL audio 10s. No loss or dip in voltage. The chrome finish flawless. It makes my polished Whipple supercharger look bad. Lol. Highly recommend it especially for the cost.
Posted by Eli (Modesto, CA) / January 19, 20182001 GMC Sierra