How-To: Install a trans temp gauge in a 95+ GMT400 with a 4L60e

[Gonzo406]

I know this post is super old but.. how hard it is to do this to my overhead console.. is it as easy as drilling the home and running the wires.. or is there some others things you have yup do to put it in the overhead console??

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It's just as easy as mounting it in any other position. Just a find a way to hide the wiring. Here's mine, I got power from the chime box. Easiest way imo to get power from the dash dimmer switch.

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[Maroon96]

I use the obdii data stream:

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Thats Torque Pro on Android, but I also use Dashcommand on iphone

Has any one done this on a 4L80E? I've got a 96 c2500 and Torque Pro on Android I'd like to use rather than installing a whole new sensor and gauge.

 

[1997]

old thread, old trucks, still lots around thou installing one shortly, thx thunderstruck.

 

[1997]

since I'm plastic trim challenged, here's another way to install.
Leave the plastic in place and fish wires thru the pillar molding ....

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used a 3/8 bolt heated with blow touch to melt thru plastic, then use as pull cord.

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here's where the wires feed thru view from under dash

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other than desecrating stock plastics, ouch, it was pretty simple.
nothing busted, yeah.

Also used an old 3/16th drill bit heated for the plastic rivets holes.

 

[1997]

77 outside temp, 75 mph, for couple hrs, no load, temp guage 120-130. Will be interesting when the 5000lbs RV's hooked up.

 

[BradJ]

What gauge pod is that?

 

[1997]

What gauge pod is that?

autometer single direct fit IIRC

 

[Yukon98]

Nice job. Maybe check with a window tint shop for a scrap of blue tint to put on the lens instead of pulling it apart.

 

[Wildblue19]

Great thread! For those looking to add a gauge somewhere else than the pillars, you can grab some vent gauge pods here.

 

[Frank Enstein]

Hey guys, you probably already have a write-up for this, but one more can't hurt. This past weekend I installed an AutoMeter GM Factory-Match transmission temperature gauge along with an AutoMeter single-gauge pillar pod in my 1995 Chevy C1500 Silverado with a 4L60e. I bought both the gauge and pod from JEGS. Here's a few pics and how to do it:

First I painted the gauge pod with SEM Color Coat. Saddle Tan was the closest match I could find to my 95's tan interior. This stuff is great, it adheres well and dries fast.

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Next I ran the wire for the temp sensor. I popped a hole in the shift cable grommet that's underneath the carpet just below the front of the drivers seat. Then I ran the wire alongside the shift cable from the bottom of the dash all the way to the shifter linkage on the transmission. I covered the wire that's exposed outside in wire loom.

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Next I installed the gauge sensor in the pressure test port that's on the driver side of the 4L60e. The Autometer sensor has the exact kind of threading as the plug (1/4 NPT), so it fits right in without an adapter. The plug was really easy to access, I didn't even have to jack up the truck to do all this. However, I've heard that the shift linkage will be in the way on the pre-93 TH400 transmissions. Also, I've seen that some other brands use a longer sensor than the Autometer ones, so make sure that you don't bottom out the sensor on the internals of the transmission.

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Here's the pod attached to the pillar. The pod is attached with four 3/16" plastic "christmas-tree" push-in rivets that are included with the pod. I also drilled a 1/2" hole in the pillar for the wires to pass through.

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That's where I messed up. I wanted the gauge pod to be as low as possible so it wouldn't create a blindspot. Unfortunately, to engage the bottom clip for the pillar, I had to insert the pillar at an angle... and of course the pod wouldn't clear the dash. It was so ' close!! I tried to back out the push-in rivets, but I was barely able to budge them before it felt like I was going to break the old and brittle pillar plastic. Plus, it would've been a royal pain to remove the pillar later on, had that did work. Frustrated, I ended up just breaking the tab off. Oh well, nothing this truck hasn't seen many times before. The pillar still stays in place and doesn't rattle without it anyways. TLDR... put your pod higher than mine or be prepared to remove the bottom pillar clip.

Anyways, I ran the wiring up the pillar. I used some leftover 16/4 wire I had for the gauge's power and lighting. It's overkill, but it was the best option I had on hand

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Next I found ignition and lighting outputs for the gauge. If you've removed the warning chime box from your GMT400 like I did many moons ago, you have the perfect location to grab power. The top right terminal is powered thru the Gages fuse, which is only hot with the key forward. The bottom left terminal is powered thru the Illum fuse, which draws power from the dimmer switch, so your gauge will dim with the rest of the dash lights. You can tap these terminals simply using 1/4" blade-style connectors. Also, the 2nd-from-the-bottom terminal on the right side is a ground, but I elected to ground the gauge to a nearby bolt instead.

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The finished product...

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Another day pic with some heat built-up

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This is the disappointing part. I expected the gauge to have a twist-lock bulb in the back that I could replace with a blue LED so it would match my Esky cluster. Nope. The lighting is completely internal. I might one day see if I can take apart the gauge and replace the internal lighting, otherwise, I might trade the gauge for an Autometer Z-series gauge, which does have a replaceable twist-lock light.

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Close up night pic.

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Or just get an Autometer C2 gauge.