What spark plug set does this truck use?

RICARDO DI BLASIO

MEMBER
2004 GMC SIERRA
6.0L
V8
4WD
AUTOMATIC
180,000 MILES

Hey, I don’t know which spark plug wire set is the right one for me.
I have the truck listed above 2500.
Online there is a 10.5” and a 9.2” set.
I think I need the 9.2” because I measured in a hurry, so I am not certain.
Also, for the 9.2 option, they have 2 numbered options, but I don’t see or can’t seem to find the number on said coil.

Basically, I want to know which one I need.

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

Hi,

It took me a few minutes, but I think I got what you need. If you look at the first picture below, which is from my manual showing there are two different coils requiring two different styles of ignition wires.

Using pics 2 and 3, see if you can identify what is on your vehicle. The one ending in 5298 will be more of a round coil and the other is, let's just say oddly shaped. LOL

Once you identify which one you need, then you can find the original equipment part number for the ignition wires in pic 1.

You will need to cross-reference the OEM part number to the brand you are getting.

Let me know if this helps.

Take care and Happy New Year,

Joe

See pics below. Note, on each coil pic I included the last 4 digits of the coil OEM part number.

Images (Click to make bigger)