Got a truck or performance car that works hard? This GM 75W-90 synthetic axle lubricant is the real deal – the official stuff from General Motors (part number 88900401). It’s a heavy-duty GL-5 rated oil that’s built to handle extreme pressure and high temps, whether you're towing a trailer or just pushing it on the highway. And don’t worry about cold mornings – it stays nice and fluid so your diff doesn’t feel like molasses. Since it's fully synthetic, it resists breaking down and lasts a long time. Oh, and it’s got this new grape scent – not kidding! Works in a bunch of GM vehicles: think front axles from '95 onward, and certain rear axles (like the 8.6-inch) from '89 to '98. Also fits models like the Camaro, Firebird, Corvette, Sierra, Silverado, and CK Utility from the late '90s to 2000. One quart bottle. Keep your axle happy and protected with the fluid it was designed for.