I don't know about GM, but Toyota puts traction control on all their trims. It locks the brake on the spinning tire which effectively makes it a locking diff. Not as good as one, but still effective for anything except off roading. I drove mine through the nastiest road conditions I have ever been in, including having to drive through deep snow drifts. 0 problem.
These people are the meatiest of meatheads, though. A lot of that. There's a truck down the road with aftermarket off road suspension, dumb undercarriage lights, fake roll bar...and car tires and rims that are extra wide. Absolutely useless on anything but dry pavement. Hydroplane on a single drop of water.