Which plug wires?

[mhorn0817]

Ive been seeing 2 different sets of AC Delco plugs wires for my 04 Denali...There are 9748GG and 9748HH...whats the difference and which do I use?

 

[blueflamed03]

odd, they look identical, everything is the same..

---------- Post added at 03:38 PM ---------- Previous post was at 03:35 PM ----------

I think it has to do with which coil packs you have.

748HH and 9748HH
Price difference is ~$12

ACDELCO Part # 9748HH More Info {#88862385}
WIRE KIT,SPLG FOR COILS STAMPED 12558693

ACDELCO Part # 748HH {#88894394}
WIRE KIT,SPLG USED W/COILS STAMPED 12558693-MELCO COIL, 7MM DIA, 10.5IN LG

 

[mhorn0817]

soooo, can i just use either..lol...i was just gonna get the HH

 

[tybardy]

get the MSD 8.5's... (overkill but certainly peice of mind)

 

[mhorn0817]

i wasnt able to take my engine covers all the way off because it started raining outside on me, i saw a tag on the side of one and it said 87...but unfortunatly it didnt help me whatsoever...so i guess i hafta take a cover all the way off to be able to see a coilpack clearly to try and find the number or what kind of coil it is.

whats the part number for the msd wires?

 

[TailHook]

Square coils are Melco (12558693), round coils are Delphi:

 

[mhorn0817]

wow that should really help me then, im pretty sure i have the square coils -melco, i will double check tomorrow and then order my wires so i can change my plugs n wires

 

[TheYuk]

One set are 9.5 inches long and the other are 10.5 inches long

 

[TailHook]

Also, the p/n stamping for the Melco coils is located on the front edge, where the boot attaches. I used a small mirror to verify...

 

[04-Denali-Oz]

Hello, I am new here and I am having trouble finding the right wires for my 04 denali. I see it has the squared coul but I dont see it matching the ACdelco coils I am looking to purchase at Autozone. Please help. Thanks.