I'm getting ready to change the plugs in my '04 Silverado with a 5.3 eng. What is the best anti-seize to use on the threads as this eng. has aluminum heads? What have you used that works well, or what is NOT recommended? Thanks.

 

any good parts store should sell a small tube of anti seize by Permatex. small tube will last a long time..

edit.. also pick up a small tube of dielectric grease and put a small amount in the plug boots, and roll the boots between your fingers to spread it evenly in the boot, and install..will help a lot when you have to remove the wires again.. ALSO put on your coil boots also..

good luck