NOTE--> I did all of this with no prior knowledge of LED wiring
This is a long write up but it's a long process... took me quite a while to get this whole process done. Only a day though.
So jumping into this you're going to need a few things...
1) 7mm nut driver
2) 8 LEDs
3) the required OHM resistors (discussed later)
4) 22awg wire
5) T10 wrench
6) T15 wrench
7) Wire strippers
8) Soldering iron/ Crimpers
9) Very small flat head screwdriver
10) Rubbing alcohol
11) Q-tips (a bunch) <-- approx. 30
12) Led holders
Sitting in your driver's seat you have to pull off the knee panel first. You remove the two 7mm screws on the bottom of the panel. After this the rest of the panel will just pop off with some effort.
Now you have to use your 7mm nut driver to remove the two screws holding on the plastic panel which surrounds/houses your gauge cluster. Two 7mm screws were revealed after removing the knee panel. With these out you can now remove the upper piece of the dash. This can easily be done by removing the lower sections first, one side at a time. Then grabbing the top of the piece, you can pull the entire piece back to you and it will come off. It's held in place by 3 clips so it might take a bit of effort to get it out.
Now with that done, there will be 4 exposed 7mm screws (two on top and two on bottom). The top two should come out easy enough but the bottom two gave me a run for my money.
These all out, you can now unplug the two wire clusters which are plugged into the top. This now frees you to take the entire gauge cluster inside. This piece is important, so be sure to be nice to it!
Looking at the back of the gauge cluster, you will see 6 - 8 t15 screws holding on a plastic liner. Remove these and the plastic liner. Now you will find about 4 t10 screws. Remove these too. This will now free up your plastic cover from the front of your gauge cluster but it will not come off just yet. To free it, you must remove all of your needles. I do recommend marking down where they sit so you can put them all back on when you're done. I removed my needles with a very small flat head screwdriver. Apply force to lift the needle straight out of it's holding spot. Mine took quite a bit of force to remove but they did come out finally. If your needles "break" into a couple pieces, that's fine because you can fix this with some super glue when you're done. Needles removed, you can now remove the front of your gauge cluster. You will only need this piece for right now. You will see the black background for your gauges is glued onto a plastic background. Feel around the edges and find the edge which comes off easiest. Carefully remove the black plastic piece. Do not pry it off because bending it would not be good.
Black plastic cover removed, flip it over to see this.
Now, with some rubbing alcohol and a LOT of q-tips, you can remove the white background from your gauges. With a bunch of elbow grease and about an hour of your time you can have your gauges looking like this.
Now, take this piece and clean it gently with some rubbing alcohol to make sure all the residue is off of it. This will cloud your display if you do not do it properly. Take your cleaned panel back to the clear plastic piece from which it was removed and reapply it to it's original position.
Now with that done, you will be able to work on your LED display. Color does not matter but as you can see I used blue. Brightness however does matter. I had to buy two separate types of LEDs. Dependent upon your year model, your dash will be split up into different sections with lighting. Looking at my gauge cluster, I noticed my blinker lights each had their own LED and the rest were scattered around the background of the gauge cluster.
With no prior knowledge to wiring for LEDs, a quick lesson from professor Google lead me to this website. -->
http://ledcalc.com/
Running my number I found out which resistors I needed and you can do the same. I had 6 LEDs running off of two resistors (3 to each on respectively) and another 2 LEDs running off of their own separate resistor (these two were for the blinkers) <-- it is important to remember each of your blinker LEDs will need their own power source that way they can be wired into your blinker power wires.
ALSO NOTE--> the flat side of the LED is the negative lead when you wire everything in for a series circuit
All wiring done, you can install the LEDs in the back of your gauge cluster by removing the stock bulbs and hot gluing the LEDs into place. With zip ties you can move from this
to this
you will need to wire these LEDs directly into the power source of your can, BUT there's something you must remember. If you want to keep the "fade" effect of your gauges, you must connect the positive lead for your LEDs to the blue/red wire. This is your illumination wire and will allow you to retain the same effects as stock lighting. The other end will simply need to be grounded. If you are having trouble getting your LEDs to work, you might wanna double check your LEDs are set the right way. Don't forget the flat side of the LED is the negative side.
Now, reassemble the gauge cluster. Put the 4 T15 screws back in and then put the plastic cover back on with the 6 T10 screws. With your wiring complete you can now wire them back into your truck. Be sure to solder all connections to ensure a quality install and cover all solder/exposed wire with electrical tape or shrink wrap.
Now you're pretty much done! Just reverse the disassembly instructions and put everything back together.