Plug gap 2004 gmc sierra 1500 - 2004 GMC Sierra 2500

SOURCE: spark plug wiring diagram

I dont understand why you would need that unless you took off all the wires and took out all the plugs and forgot how the wires were.I have the same truck and I always do the plugs and wires one at time to make sure I make a mistake.If this is your ploblem let me know because i might be able to walk you though it.

SOURCE: location of fuel filter on 2004 GMC Sierra 1500

if you don't see it along the left frame rail just ahead of the tank then it is in the tank

SOURCE: 2004 gmc sierra rear differential

remove cover.take off back wheels and calipers (or drums).turn differential to where you see small bolt/pin (5/16) horizontally (same direction as axles)on right side of differential.remove bolt/pin.A large pin (about 5"long 3/4"diameter) should slide out differential with ease ( you may have to tap one side of the large pin).turn differential to completely remove large pin.turn differential so you can see in the view window.push each axles in (they'll go in about 1 1/2"each) You may hear one of the axle C-clips fall.If not use a small telescoping magnet to remove the C-clips from the axles through the differential window.pull each axle out about 10"so they are out of the diff.Now remove the cap bolts(4-5/8"bolts) and remove the caps(mark the caps so they go in excactly the way they came out.be careful the diff might fall out.If not you may have to use a long bar or 2x4 to wedge and pry the differential out. Have a basket/crate w/rags in it to catch the diff.TIP:If you are removing the ring gear from the diff, the bolts are left handed bolts meaning you have to turn them clockwise to loosen and counter clockwise to tighten ; )

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Harvey N Tawatao

• 3854 Answers
• Posted on Apr 18, 2010

SOURCE: Is the fuel filter for the 2004 GMC Sierra 1500

You may be lucky and the fuel filter is still on the inside frame rail under the drivers door. 2004 was the change off year and 2005 was defiantly the no serviceable fuel filter.
You can go to the dealer with your vin number and they can look up in there system if you have the external fuel filter, or you can just look for it on the inside of your frame rail.
Thank you for using fixya and be safe.

SOURCE: where is the air cabin filter in a 2004 gmc sierra

I can only advise you as to the replacement of a 2002 Sierra, under the dash behind the glove box compartment is a plastic panel held on with four screws, remove this panel and the cabin air filter should be easily identified and replaceable, if you purchase a filter from an Auto Zone Auto parts store or a similiar parts store, they will advise you of whether your vehicle is equipped with the filter/filters and also where its location will be.
Some vehicles are equipped with (two) cabin filters, and also I am told that if you purchase an OEM part(Original Equipment Part) instructions are to be included in the box to further assist you.