My spark plugs on the used truck that I bought were almost worn down to nothing (the electrodes)! I’m guessing they’ve only been changed once in the 170,000 km on the truck. This should be the same procedure for Chevrolet Silverado and GMC Sierra trucks with the 5.3L engine from 2007-2013.

I am replacing spark plugs on the 5.3L engine of my 2013 Chevrolet Silverado. This procedure is the same for the GMC Sierra version with the same engine.

Tools needed:

5/8” spark plug socket (I used the Gearwrench 80546 spark plug tool)
3/8” ratchet
3/8” universal swivel joint
Anti-seize compound
Torque wrench
Torque spec for spark plugs: 11 ft-lb. or 132 in-lb.
Magnet
8 new spark plugs gapped to 0.040 inch.

Note: I didn't realize the factory spark plugs were iridium and in this video I replaced them with platinum. Since realizing my error, I ordered iridium plugs and did this again.