How do you change the sparkplugs on 1995 GMC Vandura 2500?

Answer 1

if its the same as my 1989 (5.7L V8), remove the console and engine cover, locate the distributor, the wires lead to the spark plugs, to avoid mixing up the wires, remove the wires one at a time and change the plug before removing the next wire. On the V8 the plugs are down the sides inbetween the mounts of the exhaust manifold so best to do when the engine is cold so you don't burn yourself and the front two are the biggest pain to get out. If it's been a while since you changed them the plug wires will probably be pretty tight on the plugs so it will take some wiggling and cursing to get them off, the plugs themselves will also be pretty tough to get loose.

For the 6-cyl, I have never replaced them but the idea is the same, follow the wires.

>> IMPORTANT << When installing the new plugs, thread them in by hand first using just the plug socket then tighten them with the rachet, this will avoid cross-threading, if the threads are really tight you can also get a thread chaser to clean them out, ask your local parts store for one.