I bought this unit for my 91 S10 Blazer tonight. Pretty much because the old plug gasket decided to go and i got complaints from neighbors about large quantities of oil in their spots. Oh well.
Pretty much it goes like this:
Step One position drain pan under the old plug.
Step Two 14mm socket on old drain plug.
Step Three Let oil drain. Mine was kinda really hot like my dad said i got 3rd degree oil burns and made an environmental hazard.
Step Four Wipe clean oil drain area.
Step Five is to remove the SD-1 from the package.
Step Six is to remove the dust cap off the actuator valve.
Step Seven is to hand tighten the actuator valve in as far as you can go.
Step Eight is to take a 7/8" open ended stubby wrench and tighten till you can not go anymore.
Step Nine is to remove oil fill cap and put 5 quarts of Quaker State 5w-30 High Mileage oil in there. Quiets the ol engine rite down.
I did not remove the old filter as it only has about 500 miles of oil through it because it was the second oil change in a week 3rd change in 2 weeks and 4th in 5 weeks.
Overall the product design is really cool. A copper gasket instead of the paper type one normally associated with drain plugs. The cool part comes in 1500 miles when i change the oil again all i need to do is hookup the hose unloosen the drain portion of it and no mess and no need to lose plug in oil drain pan.
http://www.partsamerica.com/ProductD...=SEARCHRESULTS
I got mine at autozone and save 10% because i know a guy who works there so i got employee discount.
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1991 Chevy S-10 Blazer 5.7 V8 RIP
1999 Chevy Blazer 2dr 4.3--> If GM engineered something to fail on this beast it has or will.

Repairs include w/in first 30 days of owning it: P1870, left front wheel bearing, gas cap, rad cap, idler tensioner, seat handles, and the list goes on.
http://www.automotiveforums.com/vbul...d.php?t=890449
Chime in ^ with any suggestions.