Tune-up

[chauncey0337]

What's the difference between those 2 Spark Plug wires?


wires # 748gg or 748hh

I believe the difference is 748gg's are 9.1 inches and the 748hh's are 10.5 inches. So measure your stock ones and order the ones comparable to yours.

 

[bikerglasses]

If anyone is interested here's some OEM #'s:

OEM 5164003 Fuel filter
OEM 15908915 Air cleaner element
OEM 12621258 Spark plug (Gap is 0.040. DO NOT CHANGE GAP)
OEM 88894394 Spark plug wire kit for vehicle having coils stamped 12558693
- OR -
OEM 88894393 Spark plug wire kit for vehicle having coils stamped 19005218

 

[DefendHawaii]

Just did mine before I left for workforabit. Rear passenger side was hell I didn't use an extension thought I bought it and bunch of other stuff. I got one of those magnetic spark plug sockets.

I got just autozone wires though. The wires in there were the Original ones from the manufacturer. Said Delphi and were extremely corroded. Three of them were broken.

This is what my plugs
Looked like (this was not even the worst) I saw the size of that gap and freaked out. I am surprised the thing even started with a gap that big.

 

[Pachanga02]

Not trying to thread jack and if I have more q's I'll make a thread but, how often should a tune up be done on these trucks or how many miles between mine is an 02 xl Denali. Thanks and again not trying to thread jack

 

[DefendHawaii]

I think 50-60k ? I have hear every 75k as well.

 

[Pachanga02]

Thanks for the quick response. I guess I could wait till next year to do mine

 

[bikerglasses]

Just ordered all the stuff for a tune-up. Ill let you k ow how it goes.

 

[bikerglasses]

I ordered fuel filter and the tool. Is.it pretty easy with the tool?

 

[ATL]

i dont remember the fuel filter taking a special tool. while you guys are doing tune ups, you should clean your throttle body, mass air meter, and seafoam the pcv hose and gas tank. between plugs/wires, and these simple $15-$20 cleaners, your truck will feel like you took 50k off the odometer

 

[Thumper8302]

Was start up better for ya? I am at 244K also. And damn it idles ok but at start up it is a little rough.

oh it was way better. didnt nearly crank as long as before i did the plugs. and that picture looks 2 times better than what mine did. the electrodes on all 8 of mine were flat with the base of the plug.... i would also def recommend yanking ur throttle body off and scrubbing the hell out of it. i need to yank my egr and see what kind of condition its in. but i hooked up my scanner and thre emissions readiness gave me a green light. prior to the plugs and wires i had lean error codes on both banks and all sorts of random missfires. im ready to get the chance to get her on the highway for a few hours and see how she does mileage wise