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Since I do most of my own mechanic work I'm really out of touch with what it costs to get something done. I wouldn't have ever thought it would cost $300-$400 to get plugs and wires changed on a 3800 V6. Or even $175 for just labor. Wow.

Thanks Padgett ! Got the AC Delco rapid fire plugs. Had to go with the Autozone wire set since everything else was on backorder (wanted the ACDelco "professional" set for 50 bucks) , but at least they are 8mm wires. Going to try rock auto for a ACdelco Coil pak.... can get a duralast from Azone but will pay extra for ACD if I can get it. Looking for a shop that can change plugs for reasonable cost... dealership wanted 400 labor and my local shop bills at 160 x 2 hrs for 350 tax included. Heck, I think I can get a mobile mechanic to come to my driveway for $175 labor for plugs and wires ! based on the online videos, I can replace the coil pack and ICM my self if I need to go to the next step, but there's not enough Ibuprofen to cover me for crawling over the engine to get to the rear plugs and "rassel" with the O2 sensor, etc etc. Plus I don't have a 4 jointed rachet wrench !! lol The saga continues

Sorry am a north-south person, have always had trouble with left-right but placing the lover (movable) jaw facing forward tends to tighten the grip. Same with channel locks, are self tightening.

Kroil is good but I mostly use PB Blaster. I'd try champing down hard (have used channel locks to lock vice grips down really hard) with vice grips (moving jaw in direction of rotation). Apply pressure and kabang with a hammer. Acts like an impact wrench.