L86/L83.Flex fuel conversion with pics and part #s

[Fless]

Not all them got that. My brothers 06 avalanche, if it wasn't for the yellow gas cap, there were no other telltales. Which when we bought it, it didn't come with. We had to get the VIN decoded for that, than added it

My '04 FF didn't come with a yellow cap. And they can be put on non-FF fuel fillers, so that's not necessarily absolute confirmation.

EDIT: If nothing else, the RPO code description will list the FF capability. Mine is

 

[Slow5.0]

Im foreigner, born and raised in Bosnia Europe, so i have right to joke around.
My brother in law have 17 Z06, and i always mess with him, dude, your Z06 is put together by bosnians in Bowling Green KY it will fell apart, so same thing, how nicely mexicans put these SUV in TX together, they always miss something

 

[Slow5.0]

Here is parts diagram
Top is 2016 non E85
Bottom 2015 E85

 

[CMoore711]

I’ve been looking into this and it looks easy enough to do.

There are a couple aftermarket vendors that offer plug and play flex fuel sensor kits. They’re a bit more costly than piecing together and building your own, but certainly much more plug and play:

CJTunes - 14+ GM Trucks/SUV flex fuel conversion

Flex Fuel Kit for 2014+ GM Truck

The DSX Tuning flex fuel kit is the original plug and play solution to adding flex fuel on Gen IV/Gen V GM V8 vehicles. Use these kits to add the ability to run anywhere from straight gasoline to straight ethanol as well as reveal the true power potential of your setup. Forced induction...

dsxtuning.com

Also, I don’t think you actually need the 22772986 E85 Filler hose kit $146.48. Unless you want some sort of visual indicator/gas cap that says E85 Flex Fuel in it. And if that’s the case why couldn’t you just get the gas cap by itself? Or is it one of those have to buy the filler hose kit to get the E85 gas cap?

 

[Slow5.0]

With Cjtunes kit you need to cut your line. DSX Tiunes is for trucks, they have different fuel line routting, with GM kit from E85 Tahoe/Yukon its 100% plug and play and cheapper if you can find hose and bracket anywhere thats in stock. I called GM dealers nation wide to get those parts. And i got a few extra just in case
There is now yellow cap for SUVs because its capsless. There is white E85 sticker on indide if fuel door. Im not zure why GM listed different filler kit on 15 E85 Tahoe than on my 16 Yukon Denali. Heck for 16 they offered
23232569
Tahoe & Yukon, without ppv, with e85
22827849
Tahoe & Yukon, without ppv, with e10

That 15 E85 Tahoe i found uses
22772986
Tahoe & Yukon, with ppv
Dont know whats different. You can buy invidual small hose from thise kits but they all same part #s, i think filler neck maybe different or with E85 kit you get small E85 sticker lol

 

[Slow5.0]

Parts finaly showed up. One from CT, one from IA and one from NV lol. Nobody localy had them in stock
Flex sensor, flex sensor bracket and lower fuel hose

 

[Slow5.0]

Flex sensor is in. Tune fixed with HP tuners. Scanner shows 10% E85. Now i have to find gas station with E85 and see if % will go up lol

 

[Slow5.0]

Got some E85, 15 gal mixed with 11 gal of 93. Drove 2 miles and it wend up from 10.2 % to 56.1%

 

[randeez]

log the fuel pressure **nevermind i see it, but show it on the graph and make sure it doesnt drop at higher rpm and figure out what you need to do to get the IDC to log. with DI you want to keep the idc max around 40% iirc

 

[Slow5.0]

I didnt mess with scanner much, or any big tuning, im just glad this flex mod is now done