How to Replace Spark Plugs 2000-09 GMC Yukon

You can move these heater hoses out of the way, just pull them out of the bracket and slide them to the side. Take the wire off the spark plug. You can twist it a little bit. It might help. And then try to pull it off. It's a good idea not to pull on the wire itself. Just try to pull on the base and you can slide this out of the way.

Before we take the spark plug out, just take a little compressed air and just blow around the plug. There may be some sand in there or dirt or debris, get that out of the way. And take a spark plug socket. It's a 5/8 spark plug socket. And you can use and an extension and take the spark plug out. And slide the old spark plug out.

Take the new spark plug. Put in the spark plug socket. And then gently, feed it over to where the hole is and just by hand, screw it in. And we can torque that to 11 foot-pounds.

You can always put a little bit of dielectric grease in there and then slide this over the spark plug. Make sure you lock it in place. And you do the same with the other ones. And move these heater hoses, put them back in the bracket.