Remove the spark plug wires from your 1993 Chevy Astro spark plugs. Remove the spark plugs with a 5/8 deep well socket, by turning the socket to the left. Reverse the process to install the new spark plugs.
To remove a 1993 Nissan maxima rear speakers you will have to remove the seat back, you will need a wrench to remove both of the bolts on each side. The seat will move once done, and then pop the parcel shelf trim. The speakers should come out.
This vehicle is equipped with a 3.8 Liter V6 and as such it has 6 spark plugs. Almost always their is 1 spark plug per cylinder. There are however exceptions. There are some Ford 4 cylinder engines that have 2 spark plugs per cylinder. There are other exceptions.