No CQ Blue for your Buick appears on the AAP web site.
It may have been discontinued with the manufacturing switch to Purolator, much like the 84899 for my truck.
"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen