How to Replace Spark Plugs 01-09 GMC Sierra 2500 6.0L

Difficulty: Beginner · About 20 min · Gmc Sierra

Replace the spark plugs on a 2001-2009 GMC Sierra 2500 with the 6.0L engine.

Steps

1. Prepare the new spark plug

   Use a gap tool to check the gap matches your vehicle's spec, pushing it until there's just a little resistance at the correct size.

2. Replace the spark plug

   Pull the spark plug wire out, remove the old plug with a 5/8-inch socket and ratchet, set the new plug into the socket and feed it down into the hole, then tighten it with the ratchet.

Check your vehicle’s repair manual for exact specifications and fit.