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 9G glow plugs and new terminal nuts together with the removal tools we use in house at Merchant Automotive. It fits 2006-2016 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L Duramax (LLY in 2006, LBZ, LMM and LML) and 2006-2016 Chevy Express and GMC Savana vans with the 6.6L Duramax (LLY, LMM and LGH).
Features
- 8 ACDelco 9G OEM glow plugs
- 8 new M4 x 0.7 glow plug terminal nuts (new 9G plugs don't include nuts)
- Merchant Automotive glow plug removal tool kit: air hammer, air nipple, air hammer tip and a removal socket machined to a specific depth
- Wheel well liner clips (for 2006-2007 trucks) and a clip removal tool
- Anti seize included
What's Included
When to Replace
Worn or failed glow plugs can cause hard starts or rough running right after startup, excessive cranking, or a no start in cold weather, and they 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
- 2006-2016 only. For 2004.5-2005 LLY trucks, see the Deluxe Glow Plug Replacement Kit for 2004.5-2005.
- Not for the L5P. The L5P glow plug has a ceramic tip that could break off and fall into the cylinder with these tools. L5P trucks use the ACDelco 68G.
- Wheel well liner clips: the included clips fit 2006-2007 trucks. They do not fit 2007.5-2016 trucks or the vans.
- 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, and report that pulling the tire and the plastic inner fender liner makes access easier.
- One owner on the DuramaxDiesels forum reports the passenger side is easy, while the driver side is tighter because of the steering shaft, power steering and hydroboost lines, and wiring harness.
- Clean carbon from each bore with the Duramax Glow Plug Reamer Tool before installing the new plugs.
- Check the ring terminals and wiring for corrosion while you have the nuts off.
Installation Resources
Related Parts
Frequently Asked Questions
Are the terminal nuts included?
Yes. New 9G glow plugs don't come with nuts, so the kit includes a set of 8.
Can I use this kit on an L5P?
No. The removal tools are not recommended for the L5P's ceramic tip glow plugs.
Do I need all 8 glow plugs?
The 6.6L Duramax uses 8 glow plugs, one per cylinder. Owners commonly replace them all at once to avoid going back in for the next one to fail.
For warranty information, see our Warranty Policy.
