Spark Plug Change in a Truck--How Hard Can it Be? Update#2

You don't have a carburetor. The carb cleaner suggested is for cleaning your throttle body. A very good idea. To clean the TB on out Envoy 4.2L I remove it first. I can do a better job of cleaning it and don't have to worry if the cleaner is "sensor safe" or not. In 125,000 miles I've only had it off twice.