For the Silverado/Sierras you have to either install it like Dominatorstang did (and I will be doing a variation of) where the sensor is further rearward than it is with the factory installation or... if you want a true factory-style installation, you have to have the following parts:
Flex Fuel Sensor - 13577429
Flex Fuel Sensor Mount - 20967866
Flex hose/fuel line (towards engine) - 23171538
Flex hose/fuel line (towards fuel tank) - 20967834
Fuel line (towards engine) - 23171532 (I think this is the correct P/N, but was difficult to verify online)
Fuel line (towards fuel tank) - 23158924 (this varies depending on wheelbase, but this is the part for a 153" wheelbase)
Fuel line bracket - 15168646
Fuel Tank Filler Cap E85 - 22921366
Single cab trucks also need a filler hose, as the factory had different ones for Gas vs. E85. Crew cabs and extended cab trucks have an E85 ready filler hose.
1st time post here, so go easy on me ....
running off the E85 virtual currently and want to move to a true sensor.
Has anyone had any dealing on a 2018 Escalade and no sensor plug? The closet I have seen pics/vids on, are of the sensor plug on the gas tank shield with a tree connector on a 2018 Denali L86, but I cant find anything on my 2018 Escalade L86 6.2L.
any body ever find the plug?
also, as others say, the 2018 escalade shows a pin on X1 38 already (fuel temp/composition)... is this pin used on something else on non flex trucks? will taking this stock wire off and tapping my sensor to it affect anything else?
thanks
Rob
The plug should be there on your Escalade. Drivers inside of the frame rail just in front of the fuel tank.
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This shows where the sensor goes. The plug is right near there and should currently be plugged into a dead connector to protect it.
Last edited by WingsAA; 09-21-2022 at 08:27 PM.
That?s where I was looking. Just concerned an Escalade might be different. It does have a huge automatic running board harness around that area. On the 2018 Denali Yukon it?s on the plastic tank guard. Closest open hole next to frame. You think maybe it?s in a different spot ?
Last edited by talonman69; 09-22-2022 at 07:20 PM. Reason: Punctuation
The connector will look like it's plugged in... It's a dead socket. I'll take a picture of mine later tonight and post it.
Awesome thanks!
Here's the connector plugged into my FF sensor. It's a bit tricky to hold the light and get a decent shot so hopefully this helps. The connector end is a brownish/orange color.
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Yea where you have the 2 bundles coming out of the plastic ?Tee?? I only have one, for the sensor in the fuel line. Bummer. Maybe late escalades had that omitted from the harness.
I?m thinking on trucks that had only one engine option they didn?t add the plug, ie all suburban Yukons and tahoes had an option 5.3. On the 6.2 on the Escalades. I guess I?ll just wire it in off something for power.
Thanks wings for all your help.
Rob
2016 Escalade ESV here. No connector under the drivers door. ECM is already pinned. Will pin the x125 pin 17 connector to the alcohol content sensor and report back after I get everything installed.
did you get the 2016 escalade esv work?
i have a 2020 escalade esv, i really want to change my car to be flex fuel, can anyone here help?
I do not have the plug either, 2016 Escalade. When I looked at the factory data it shows x125 pin 17. Shows white wire circuit 1579.
Can confirm on my 15’ Escalade the signal wire pins out on x125 pin 17. Pinning the molex m150 style connector is the most difficult part due to location and restrictions of the male harness free movement. There are some videos on how to disassemble males connector to insert pin. You’ll need to salvage an old harness to find a pin. Or I used one of these.
https://www.customconnectorkits.com/...s/33000-1002-l
I used GM flex fuel sensor and GM female to female fuel line connector mentioned in previous posts. You’ll also want the GM plastic mount as it provides the exact amount of space from the chassis to make this fuel line work.
Used a fuse tap add a fuse for power with 5amp fuse for ignition power. Just used firewall ground as well for now. May move power and ground later to make it more discrete/more factory like.
Just bought a pre wired flex fuel sensor connector with 6 feet of wire, this was long enough with a little slack for sensor wire.
Last edited by Rlavachek; 02-11-2025 at 02:12 AM. Reason: Finished working install
2017 escalade, no connector for me either. i really dislike the add a fuse idea. i'd rather install a terminated lead into an empty spot in one of the fuse blocks. for example, zzperformance makes a kit for cadillac ats and this is how it installs, with its own 10 amp fuse into an empty spot in one of the fuse blocks. i just don't know the size of the terminated lead required. i already have the terminated lead for ecu pin