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2015.5 Tow Mirrrors for '03-'07 Classic Body Style I've been viewing a few threads regarding this topic and found some aftermarket tow mirrors to mount on my '07 classic GMC. These are what I bought, but via eBay.

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Now, these mirrors will bolt up and the stock wiring will work, but the LED's will only function as turn signals. The rear facing lights on the mirror come with wires you need to run into the cab to get power to them. I wanted to make the forward facing turn signals dual function, so to do that you need to take the mirrors apart. So, if you're in a cold environment, I would bring the mirrors inside. You have to carefully pull the lower mirror off first, and then carefully pry the upper mirror off.

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My screwdriver is pointing to one of 4 sets of tabs that hold the mirror on. Again, be careful, I broke a couple tabs off of each mirror taking them off. I used 2 part epoxy to reattach them. This is what you will see now.

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There are 4 screws you need to remove now. Here's a little closer pic of them.

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Here's what it will look like once you take the screws out and move this part out of the way. I unplugged the wires running to the clear back up LED's to let this part rest on the counter top like this.

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Now, you will be able to see the wires going to the forward facing LED's. There is a blue wire (power) and a white wire (ground.) Just unplug it so it's easier to work with. You will be splicing in to the blue wire. At this point, I wired up my resistor and diodes, and ran the new clearance light power wire into the mirror. You need to extend the mirror to be able to do this better. You'll be prying the top of the upper arm off to reveal the existing wire loom. Then you'll run your new wire along this. Here is where I pried the plastic to get it open.

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Once you get it off you'll see where to route your wire. Mine is a red wire.

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Now we can wire in the resistors and diodes. I used a 470 ohm resistor to reduce the light intensity for the clearance lights. Then, a diode is wired into each power wire (clearance light power and existing turn signal power.) The diodes only allow electricity to flow one way which keeps power from backfeeding into the circuits. I purchased my resistors and diodes at Radio Shack. They are 1/2 watt 470 ohm resistors and 1/2 watt diodes. I believe the diode number is 1n4001. Here is a pic of the setup.

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The single wire from the resistor/diode setup goes to the blue wire which powers the LED's. The wire attached to the resistor is soldered to the new clearance light power wire you just ran into the mirror (this powers the LED's at a reduced intensity via the resistor.) The other leg of the setup with only a diode is soldered to the existing power supply wire for the turn signals.

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I didn't get any pics of that step. Now, you can put the mirror together and do the same thing for the other mirror. Then mount them on the truck and run new clearance light power wire along with the included reverse light wires into the truck cab. There are some good videos on how to remove the door panel and run wires into the the cab that you can find on YouTube.

I pulled power from the reverse light wire (light green) in the BEC in the driver's side footwell.

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Here you can see the red wire tap I used to get power from the reverse lights.

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Then find an appropriate ground. I ran the passenger side mirror reverse light wiring up under the dash to the driver's side. I then ran the driver's side mirror clearance light power wire to the passenger side of the truck. I didn't take any pics for this as this is easy but time consuming so the wires are up out of the way. I pulled power for the clearance lights from here.

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This is the right side BEC. Its on the right side of the dash. The panel cover pulls off just like fuse panel cover opens on the drivers side. I found this to wire up the cab clearance lights I added a couple weeks ago. Your looking for the green connector. There are six possible wiring locations in two columns of three. In the right side column as your looking at the back of the connector, the middle wire or lug is power for the clearance lights. Obviously, double check this and the reverse power wire with a 12v test light to confirm you're on the right circuit. Tap into this and attach your clearance light power wires and your done. Button everything up and enjoy your new style mirrors. Here is a before and after with mine.

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And, here's a video of how they work.

https://youtu.be/QpZiM2X3WhE

Good luck!
 
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That will teach me to not do a little more research on this forum first! That would make mirror disassembly much less nerve racking.
 

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Sorry I'm confused...I think it's because i hate doing electrical! So how many resistors and diodes for one side? And did you cut the blue wire to splice your new power wire in or did you just use those crimp splices to add another power coming off the blue? I just put these mirrors on my 08 lmm and hate that the outside ambers don't work as running lights
 

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I hate you JD4230. I just installed puddle lights on my 06 Mirrors now I want to do this.
Do the new mirrors tilt up just up a little like the 06 ones did stock? It looks a little like it to me, but it could just be a illusion.
 

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What would it take to wire these up to where the ambers are just strictly running/marker lights and the red arrow is the turn signal?
 

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I hate you JD4230. I just installed puddle lights on my 06 Mirrors now I want to do this.
Do the new mirrors tilt up just up a little like the 06 ones did stock? It looks a little like it to me, but it could just be a illusion.
Dozerboy, they do tilt up like the OEM ones do. I didn't really pay attention to it until I took the pictures. I was more concerned about the wiring, installation, etc. I really could notice it driving since I was used to my old ones being straight up and down. I'm going to level them like I did to my old mirrors when it warms up this spring. I don't have a heated garage, and I don't want to break the plastic cover over the mirror hinge when I pry it off. That plastic is a lot more brittle when its cold.

Hopefully, you can find them again shortly. The style I bought has been out of stock since Christmas.
 

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What would it take to wire these up to where the ambers are just strictly running/marker lights and the red arrow is the turn signal?
Sorry, I didn't notice your questions until you pm'd me, NastyMaxx71. You could make the forward facing amber LED's clearance lights only by running a new clearance light power wire into the mirror. Then cut the blue wire going to the forward facing LED's and solder your new power wire on to it. You can't do it at the mirror harness where it plugs into the door because they have wired the forward facing LED's and the mirror glass LED's together in the harness. Again, you would have to wire it that way inside the mirror housing. Let me know if you have any other questions.
 
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Ok cool thanks. I'll probably just go ahead and make them dual function since I seen that wire diagram. That really helped a lot! Just one more thing...I'm assuming the top mirror just snaps up just like the oem ones and the bottom mirror pulls straight off? I'd hate to break my new mirrors taking them apart!
 

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Looks great on the trucks. think I want some now.....
 

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great post, I'll be adding this to the to-do list...
 

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I'm stumped....

 

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Only thing I can think of is if the ground to the turn signal goes through a relay?
 

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Does anyone know of any aftermarket mirrors for the 03-07 classics that are wired for dual function from new, without modification?

Has any aftermarket manufacturer done this now since this writeup in 2015?
 
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