Deluxe Glow Plug Replacement Kit, Duramax | 2004.5 - 2005

Glow plug removal can seem straightforward, but if the incorrect tools are used, the chances of breaking off a glow plug or damaging the cylinder head are greatly increased. The Merchant Automotive Deluxe Glow Plug Replacement Kit puts a full set of OEM ACDelco 63G glow plugs and new terminal nuts together with the removal tools we use in house at Merchant Automotive. It fits 2004.5-2005 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L Duramax LLY.

Features

• 8 ACDelco 63G OEM glow plugs
• 8 new M4 x 0.7 glow plug terminal nuts (new 63G plugs don't include nuts)
• Merchant Automotive glow plug removal tool kit: air hammer, air nipple, air hammer tip and a 12mm removal socket machined to a specific depth
• Wheel well liner clips and a clip removal tool for putting the liners back on
• Anti seize included

What's Included

• (8) ACDelco 63G glow plugs
• (1) Glow plug terminal nut set (8 nuts)
• (1) Glow Plug Removal Tool Kit: air hammer, air nipple, glow plug removal air hammer tip, 12mm glow plug removal socket
• (2) Wheel well liner clip kits
• (1) Clip removal tool
• (1) Tube of anti seize

When to Replace

Worn or failed glow plugs can cause hard starts in cold weather and can set check engine lights. Glow plug faults for individual cylinders set codes P0671 through P0678 (cylinders 1 through 8). Owners on the DuramaxDiesels forum recommend replacing all of them, or at least the whole side, while you are in there.

Before You Order

• 2004.5-2005 LLY only. For 2001-2004 LB7 trucks, see the 2001-2004 Deluxe Glow Plug Replacement Kit. For 2006-2016 trucks (including 2006 LLY), see the 2006-2016 Deluxe Glow Plug Replacement Kit.
• Air compressor needed: the air hammer needs 4.5 CFM at 90 PSI.

Installation Tips

• Owners on the DuramaxDiesels forum recommend doing the job with the engine warm, soaking stubborn plugs with penetrant, and backing them out slowly instead of forcing them.
• Owners report that pulling the tire and the plastic inner fender liner makes access easier. The included clips and clip tool help put the liners back on.
• Clean carbon from each bore with the Duramax Glow Plug Reamer Tool before installing the new plugs.
• Check the terminals and wiring for corrosion while you have the nuts off.

Installation Resources

• Merchant Automotive video: How to correctly remove a stuck Duramax glow plug
• Merchant Automotive video: Duramax Glow Plug Removal Tool Kit

Related Parts

• Duramax Glow Plug Reamer Tool
• Glow Plug Controller, 2004.5-2005

Frequently Asked Questions

Are the terminal nuts included?
Yes. New 63G glow plugs don't come with nuts, so the kit includes a set of 8.

Will this fit my 2006 LLY?
No. 2006 LLY trucks use the 9G glow plug. See the 2006-2016 Deluxe Glow Plug Replacement Kit.

For warranty information, see our Warranty Policy.