[el ess A]

If your dealer was trying to sell you the complete lug/lock package, 19259108, that does list for $150. It has 16 regular lugs and 4 locks and 1 key. I doubt you need 16 more regular lugs...

If you want just the locks and key...

GMpartsdirect.com will ship a GM set to your door for $79.

Or you could buy McGard 24215 (chrome) for around $28 off Amazon and get the EXACT SAME LUG LOCK.

McGard has been supplying GM with their wheel locks since like, forever. Just look at the shape of the packaging as well as the shape of the lug and key. It's identical. I bought some eons ago for earlier Camaros I've had, and other 80s model cars, and always got the GM ones. Each package says something to the effect that if you ever lose your key, contact McGard and they can send you a replacement if you give them the coded number in the package. Also, if you look at the key inside the GM package, it even has McGard stamped on it.

According to GM's verbiage, if your car was built BEFORE 12/07/12, you use p/n 92221880. (1st design)

If your car was built AFTER 12/07/12 you would use 19259109. (2nd design)

Have no idea of the difference between 1st and 2nd designs.

If you have black lugs and need a matching lock, McGard has p/n 24216 in black chrome for a bit more in price, and if you're looking for "tuner" style locks for a few bucks more, they have them in chrome p/n 25115 and black chrome p/n 25116. I could not find a GM lock set in black.

As far as brand, I don't think any of them are all that and a bag of chips. A few years ago, I bought some chrome Gorilla lugs for one of my 80s cars' chrome wheels, thinking they were a step up from McGard. Nope. They rusted even worse than the McGard ones.