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Finally! GMT800 style towing mirrors on GMT400.

49K views 43 replies 26 participants last post by  88GMCtruck  
#1 ·
Finally! After years or people asking, and numerous people installing GMT800 mirrors that didn't correctly fit GMT400 trucks. Well, as some of you know, some ebay sellers started selling mirrors that apparently fit. After much debate, research, etc, I determined that the bases must be correct, and pulled the trigger on a set.

I bought the power, heated and side signal version for my truck. The goal was to put these mirrors on because the towing mirrors I currently have kinda suck. They don't extend out far enough to really see around my trailer, and they vibrate like crazy. Also, the horizontal mirror glass isn't as useful as a vertical mirror would be.

Few comparisons. My factory style CIPA towing mirrors VS the GMT800 style.
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I also modified the mirror wiring so I can use the side LED as a marker and signal light. I added the signal wires to the 2 empty sockets in the 8-cavity plug that came with the mirrors.
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So, pull your door panel off. 95+ guys, you just have to remove the little triangle cover unlike the 88-94 trucks.
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And remove the foam block, and 3-10mm nuts.
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Bolt the new mirrors up. The actually designed these with a longer top stud, and brace that holds from the inner door structure.
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Old mirrors
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New mirrors (only one side done)
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#2 ·
Few detail shots.
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Done!
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So, overall they are great. Honestly I can't really tell any quality difference over an OEM GMT800 mirror, they are very solid. The signals IMO look awesome lit up as well. The bases are shaped almost perfectly for the truck, a little off in the front but nothing that is unsightly.

As of now, I have the wiring in the doors and under the kickpanel. I'll be wiring in the mirrors, heat and a power window switch from a first-gen S-series blazer. I still have to build the harness but that is going to completed over the weekend.
 
#4 ·
Lookin good, can't wait to see some pics of the marker/turn signal lights on! Now I really want to get a set for our '95 Z71 ranch truck. Do you know the name of the seller you got them from?
 
#6 ·
They are from ebay seller "optionracing"
 
#7 ·
That looks really good! If i ever end up with a OBS i will have these on asap
 
#8 ·
having seen these recently I am not considering them. I always thought I wanted to modify a pair for my truck, but if they make them now and of good quality, I might have to check into it.

I'd probably go no signal marker lights on the side and color match them, looks like its time to break out photoshop again for the first time in a few years for truck stuff :lo:
 
#13 ·
they aren't powerfolding or powerextending.
Correct.

Thanks for the comments guys. I've always loved this style mirror, and am overly shocked they started making aftermarket version that fit our trucks correctly.
 
#16 ·
Shouldn't be any reason they wouldn't fit.
 
#17 ·
Those look sweet! :imo

I also really like how you do nice OEM-style modifications to your truck. Makes a big difference.
 
#18 ·
Yeah I love putting OEM type stuff in my trucks. It always looks like it should be there then.
 
#22 ·
very nice upgrade. Do they vibrate at highway speed?
A little. Nothing more than you'd expect from such a large mirror.

Looks good. There has been a older guy running around with a set on his OBS tow pig for the last few years in town.
Hum, wonder if they are regular gmt800 mirrors, since these only recently came on the market.
 
#23 ·
The actual mirror looks like the one you would find on any NBS or NNBS. I haven't been able to get up close enough to see what the mount is like. I won't be able to see it until next summer, guy seems to only take it out in the summer. It's in damn near mint condition.
 
#26 ·
I got the wiring all buttoned up today.
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Modified the S-10 switch to sit properly under my IP cluster.
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Harness ran under the dash, working some bugs out.
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Finished dash.
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Few shots of the mirrors with the lights wired in.
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Mirrors extended out.
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