100k mile tuneup
New shocks/struts (whichever these use)
Recharge AC
Fuel filter/oil filter
Tranny flush
What else would you all do?
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https://ls1tech.com/forums/general-maintenance-repairs/534376-how-seafoam-your-car.html
Great write up by ChocoTaco369.
Do a tranny flush. You wont leave the shop and that is a 50/50 odd right there. The new fluid has a lot stronger detergents than the worn out fluid and will wipe all the varnish off of things and you will have a slipping tranny in NO TIME.
Engine flush...dont do it. You will most likely wipe the varnish off the bottom of the pan and clog the oil pick-up tube.
I know on my 170K mile LT1 just running shell rotella 15-40 filled my oil filter with jello like crap every 3-500 miles until it was all flushed out, I cant imaging what I would have stopped up with an engine flush!

Auto tranny...if it hasnt been changed every 15-20K miles, DO NOT DO IT! EVER!! If the fluid isnt dark, its okay, if it is dark, its beyond help. Just leave it be! It will thank you by not crapping out and slipping 10 miles after your new fluid rips all the old, varnished clutches apart.
The valves need replacing from time to time because they get gumed up with oil vapor, etc. It's an extremely cheap part. Maybe $7 from a dealer or less from a chain parts store.
21mpg in the city isn't bad. I only get about 19-20 in the city with my 3.8L V6s in my Monte and Bonneville.









