Hey, I bought mine at O'reilly. I was looking for it and the counterperson asked me what I was looking for and I told him. He went in the back and got it. They told me it was too expensive to leave out front. The cost was $6.75 a quart. The GM dealer wanted $10.50 a quart.
Man I can't even find it online, except for 1 place that sells it in 5 gallon buckets! AAAAAAHHHH! I don't know if the guy@autozone is just being a jackass or what but he says they can't order it. I've got one more store to try (Salvo). If they don't have it, I'm getting GL-3 from the stealership.