No, you don't want to use any of that stuff. It isn't necessarily that the AC Delco tablets will do damage. It's because you don't know where the leak is or the nature of it. Check your hose connection on that side to see if it is coming from there or if it is coming from the cap.
A bad cap is cheap, but if it is coming from the radiator hose connection, you need to drain the system and get the hose off to check the plastic barb for wear. The glycol will turn to acid if not changed often enough, it is an inevitability for glycol especially in these conditions. They break down into their base acids once the inhibitors are "used up" so-to-speak.
I suspect you aren't comfortable draining it, so bite the bullet and take it into the shop.
'09 PSM G8 GT - OPG Intake, DOD-Delete w/ Stage 1C 218/229 .600 Lift 117.5LSA, Kooks 1 7/8 Mids, Solo Axle-Back w/ X-Pipe, SuperPro Bushings (Front and Rear). BMR Sway Bars (Red)
"If you want to criticize someone else's work, be sure that your own is in order first."