How To Replace Spark Plug Wires 2000-06 Chevy Tahoe

All right. We want to disconnect the battery. Disconnect the negative cable, use an 8-millimeter ratchet wrench or a wrench, and slide that out of the way. All right. Now, replace the plug wire. Just grab the top of the wire, pull it down. And then, at the spark plug, you can try twisting this first. See if you can loosen it up. Try to pull it. Try not to bend the aluminum too much, but if you're struggling to get it off, you might have to a little bit. There you go. Pulled that one out.

You can take a little dielectric grease or some silicone lubricant. Just put this in the end right here. Then, you want to take the heat shield off the old wire and reuse this. Now, we can line this up, up top on the coil. And then line it up with the plug. Slide it in position. Make sure it clicks in place, just like that. Then you're going to do the same procedure for the other wires.

Now, we can hook up the battery. Line it up, get it started, and snug it up. Just make sure it's not loose. That's good.