I use a 5/8" spark plug socket, 3/8" drive, with a long "wobble" extension, working thru the wheel well opening with tire removed.
remove the air intake box for ez access to the steering shaft ,remove the plastic cover over the universal joint from the shaft to the steering box. Next remove the one bolt joining the two. use a pry bar to separate then push back the steering shaft. I used one of the longer used cables to tie the shaft in an up position ,no need to extract shaft fully. Go in through the flap of the wheel well to extract the old spark plug.
Move the steering shaft. There is one bolt under the plastic cover. This is the pinch bolt .Remove it and slide shaft towards firewall ,move shaft out of the way ,replace plug,re-install shaft,bolt and plastic cover.
If you have the 4.3L engine I jack up the front of the truck and remove the wheels. With a socket and long extension you can easily get to 5 of them. The one behind the steering shaft is the hard one. This one requires some engenuity.
100,000 miles and the drivers side rear can be a nightmare i have found it best to take the bolt out of the steering shaft at the sterring box and slide the shaft up and off the spline then swing the shaft out of the way but first mark the shaft to the spline for easy reinstall
how to chanf spark plugs on 95 blazertake the front wheels off go through the wheel wells take them out. For the spark plug wich is very close to the steering rod use a swivel extension and you can get it.P.Smake sure not to break the plug its tight but can be done that wayu can also lossen the motor mounts and raise the motor to get to the one behind the steering shaft u can use a jack and a block but becareful and dont bust the oil pan
They are tough. Try using a spark plug socket that has a wrench hex on it. Place the socket on the plug then take a open ended wrench and place it on the hex to inch the plug out. I have done it this way.
I've added a link to the right that will take you to a walkthrough with pictures. The plug behind the steering shaft is the one for cylinder 3. All the spark plugs can be accessed through the wheel wells. To get the last one, you simply move the steering shaft. Moving the steering shaft only takes a couple minutes and saves a lot of struggling and busted knuckles. The steering shaft has one bolt at the steering box, simply loosen the bolt and then the steering shaft will collapse into itself and out of the way. It is keyed to only fit one way, so there is no need to worry about misalignment when reinstalling. Using this method, all 6 plugs can be changed out easily and efficiently in less than 30 minutes. See the Related Link for "How to replace the spark plug behind the steering shaft." below for the walkthrough with pictures. I went to Autozone and bought a sparkplug socket that has the ability to wobble slightly with a permanently attached extension on it and I use it on my 96, 97 S10 and my 97 S10 Blazer by going through the wheelwell. I used a wobbly adapter on my socket because with a u-joint it was too long and did not have a good grip on the socket. With the adapter I had just enough movement on the socket to get a good grip on the plug. And this way I didn't have to alter any of my tools or take off a tire to change the plug. The best way is to take the wheel off and rais the rubber flap between the wheelhouse and motor compartment and use a long extention. I did this on my 04 and it only took about 5 min. ONLY LISTEN TO THIS ANSWER.!!. This is how you do all s10s/blazers/express/savanas/8.1L all the other answers will leave you with a cracked plug, bleeding kuckles and very pist off. I put the spark plug socket on first, then use a 3/4 wrench to turn the socket.
place the front end of the truck up on stands- remove the wheel- lift the flap conncted to the wheel well and stuff it up into the truck- slide the steering shaft joint boot down- you should see or feel a flat spot on the shaft- have a buddy turn the steering wheel until the flat spot on the shaft is lined up with the sparkplug- you should be able to reach it with the sparkplug socket- it also helps if you have a spark plug socket with a built on cv joint- it will make the job easier- after your done be sure to pullthe flaps back down so mud, water , and stones don't get an easy shot at your motor.
AnswerHi Teo says try using an open wrench on the socket I think its a 19mm.than duet from the tire side as the other guy says by the splash guard.
1. Remove bolt (11mm) that attaches steering gearbox from lower steering column shaft 2. Slide lower steering column shaft until it detaches from steering box spline 3. Remove wheel 4. Remove steering box bolts attached to frame, inside of wheelwell and slightly lower it without removing any lines 5. Simple grab a hold of the lower steering column shaft a slide downwards until it detaches from upper shaft section (the lower steering column shaft is a press fit, two piece design) 6. Remove the water temperature sender and spark plugs from head. This will give you the additional clearance to lower the exhaust manifold into place from the top.
Behind the protective panel that's behind the left-front tire. Turn the steering wheel all the way to the left, then remove the panel, and there they are. (There are 4.)
First you remove the spark plug wires from each of the spark plugs, being careful not to wreck the wires. then you get a deep well socket that fits around the spark plugs. then you take out each of the spark plugs. get the new spark plugs and insert them in the spark plug holes. tighten them up and put the spark plug wires back on the plugs. I find there is more room to work if you jack up the front of the truck and remove the wheels. With a long extension you can easily reach five of them thru the wheel well. The one behind the steering shaft on the drivers side is a challenge.