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Converted to E85

bobbobtar

By bobbobtar
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EXSlider400 Senior Enthusiast

EXSlider400

Posted
Posted

Not sure if it is still true but older models, the E85 has hardened valve seats and I think some other internals. More educated people than myself on this topic can verify if this is accurate.  

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bobbobtar
bobbobtar

Just converted my 2016 Chevy Silverado LTZ 5.3L Double Cab to run E85 same as my 2014 GMC Sierra 5.3L. The Chevy did not come from the factory as a flex fuel, but the GMC did, these are the GM parts I

bobbobtar
bobbobtar

Seat of the pants, I could tell it was different, felt like it had better acceleration.

transam69230
transam69230

I would completely advise against running e85 in your truck until you get the ECU tuned.

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TXGREEK Senior Enthusiast

TXGREEK

Posted
Posted
Not sure if it is still true but older models, the E85 has hardened valve seats and I think some other internals. More educated people than myself on this topic can verify if this is accurate.  


You’re correct, it’s more than just a kit. I’ve heard of linings within the fuel system in addition to other flex fuel compatibility issues with non flex vehicles. But, you’ll have those that swear by it.


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1SLOW1500 Senior Enthusiast

1SLOW1500

Posted
Posted

Can some one please up date the part numbers for a 2016 sierra crew cab. I get a insane GM discount but I need the right numbers to get the parts. I want to try it out as I tune my own truck and have HPTuner PRO so I can data log to see. 

E85 is much easier to tune then Meth and easier to get and less side effects. Because you have the factory computer seeing it and changing for it. Where meth is great at making more power and keeping the IAT down. Other than the IAT changing the fuel and timing tables there is no guaranty. If the system stops or screws up the truck could run lean. Even a nice progressive control system, is a lot of work to setup and then retune the PCM everytime.  

PART NUMBERS PLEASE! I would think just the lines are different.  

 

  • Like 1
  • 1 month later...
thekevin Enthusiast

thekevin

Posted
Posted

I am really interested in this as well for my 2018, especially if the sensor is auto detecting because I don't plan on tuning my truck until after the factory 60k mile warranty is out but I want to be able to run E85 in it while towing.

Black02Silverado Senior Enthusiast

Black02Silverado

Posted
Posted
On 10/10/2018 at 10:48 PM, TXGREEK said:

 


You’re correct, it’s more than just a kit. I’ve heard of linings within the fuel system in addition to other flex fuel compatibility issues with non flex vehicles. But, you’ll have those that swear by it.


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Other than the sensor and the ECM having the tables for E85, I don't think that there is any other difference in the vehicles.  GM isn't going to run a separate line just for FF vehicles  and or have a bunch of other parts to install on a line. To add a sensor isn't a major undertaking.  Our vehicles are able to handle E85.  If they were not then my 2002, which is not a FF vehicle and has been running on E85 for over two years now with no issues would have given me a notice of some kind by now.  Also, our 2016 Suburban isn't FF and it has been running on E85 since we purchased it back in Dec of 2016 with no problems.

 

Plus several post are on here showing where GM parts counter people looked the the fuel system on the trucks and the only difference was the sensor. All the other part numbers are the same.

  • Like 1
TXGREEK Senior Enthusiast

TXGREEK

Posted
Posted
Other than the sensor and the ECM having the tables for E85, I don't think that there is any other difference in the vehicles.  GM isn't going to run a separate line just for FF vehicles  and or have a bunch of other parts to install on a line. To add a sensor isn't a major undertaking.  Our vehicles are able to handle E85.  If they were not then my 2002, which is not a FF vehicle and has been running on E85 for over two years now with no issues would have given me a notice of some kind by now.  Also, our 2016 Suburban isn't FF and it has been running on E85 since we purchased it back in Dec of 2016 with no problems.   Plus several post are on here showing where GM parts counter people looked the the fuel system on the trucks and the only difference was the sensor. All the other part numbers are the same.

 

 

 I wouldn’t take any interest in what a parts counter guys says cause he’s not an engineer nor ever took part in the manufacturing of any parts they sell. Part salesman will sell you whatever they’re supposed to sell you. Another note, I’ve heard of some people mixing it 2-3 gallons E85 and the rest premium per tank without any issues. What I do know is that I left my 2014 pickup at the airport for a month with a full tank of E85 and next day after I picked it up it ran horrible, techs (someone that actually works on cars) told me that they found rust in my fuel lines. Needless to say, with a big smile on my face, traded it in that same day. Good luck and everyone have a great Thanksgiving [emoji884]

 

 

 

 

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Yondu Enthusiast

Yondu

Posted
Posted
On 11/16/2018 at 2:34 PM, Black02Silverado said:

Other than the sensor and the ECM having the tables for E85, I don't think that there is any other difference in the vehicles.  GM isn't going to run a separate line just for FF vehicles  and or have a bunch of other parts to install on a line. To add a sensor isn't a major undertaking.  Our vehicles are able to handle E85.  If they were not then my 2002, which is not a FF vehicle and has been running on E85 for over two years now with no issues would have given me a notice of some kind by now.  Also, our 2016 Suburban isn't FF and it has been running on E85 since we purchased it back in Dec of 2016 with no problems.

 

Plus several post are on here showing where GM parts counter people looked the the fuel system on the trucks and the only difference was the sensor. All the other part numbers are the same.

I'd like to know if anyone who has installed the e85 sensor without tuning has a scanning software or tool to confirm that yes, the truck is reading ethenol content. I have HPTuners but at 650 miles I won't be using it. Flex fuel is the one option my 2018 doesn't have but wish it did.  Lots of e85 stations here in MN. 

RDKILL Enthusiast

RDKILL

Posted
Posted
On 11/16/2018 at 2:34 PM, Black02Silverado said:

Other than the sensor and the ECM having the tables for E85, I don't think that there is any other difference in the vehicles.  GM isn't going to run a separate line just for FF vehicles  and or have a bunch of other parts to install on a line. To add a sensor isn't a major undertaking.  Our vehicles are able to handle E85.  If they were not then my 2002, which is not a FF vehicle and has been running on E85 for over two years now with no issues would have given me a notice of some kind by now.  Also, our 2016 Suburban isn't FF and it has been running on E85 since we purchased it back in Dec of 2016 with no problems.

 

Plus several post are on here showing where GM parts counter people looked the the fuel system on the trucks and the only difference was the sensor. All the other part numbers are the same.

I agree...I have a 2016 Silverado and have been running 50/50 93oct and E85 for almost 2 years with no issues. BBP did the tune so I can run the 50/50, but when I get the sensor (from DSX Tuning $300) installation should be straight forward due to the fact that GM has the harness for the sensor zip tied on the frame under the truck. If the harness wasn't there, then I could see there may be other parts that may be needed, but at this point it seems all I need is the sensor and a tune to run 100% E85. This makes sense from a manufacturer's point of view, only need to add a sensor and tune for customers purchasing a FF truck...quick and easy no real increase in man power hours, as oppose to change out the fuel lines, fuel pump, injectors etc.

 

Keep in mind, what is mentioned above is my experience with running E85 in my non-FF truck and opinion, this is only information.

What you do with your truck is on your dime, and responsibility.

  • Like 1
Black02Silverado Senior Enthusiast

Black02Silverado

Posted
Posted
42 minutes ago, Yondu said:

https://paceperformance.com/i-10801493-13577429-fuel-composition-flex-fuel-sensor-e85.html

 

https://paceperformance.com/i-8396465-13352241-flex-fuel-e85-composition-sensor-harness.html

 

Then you just need fuel line connectors.  I don't understand why places get away charging $300 for this stuff. 

Supply and demand. 

  • Like 1
swathdiver Senior Enthusiast

swathdiver

Posted
Posted

Y'all should remember that the L83 is a FlexFuel engine.  Whether or not it's currently configured (with gas cap, stickers and sensor) matters not, it's highly unlikely GM changed anything to make it not compatible.

 

It makes perfect sense as many have shown that about all was needed if I read these posts right was to install the sensor and change a line to accomodate it.  The tables are already programmed in the PCM and the wire harness is there.

 

Rusty fuel lines attributed to E85?  I'd say it's attributed to water.  

  • Like 1
Yondu Enthusiast

Yondu

Posted
Posted
32 minutes ago, Black02Silverado said:

Supply and demand. 

Exactly. And there is plenty of supply so why anyone would pay $300 is really confusing.  $65 for the sensor and harness, just need the fuel line connectors.  It's $100 worth of parts.  

  • 9 months later...
sensinitas Enthusiast

sensinitas

Posted
Posted
On 4/11/2016 at 5:27 PM, bobbobtar said:

Just converted my 2016 Chevy Silverado LTZ 5.3L Double Cab to run E85 same as my 2014 GMC Sierra 5.3L. The Chevy did not come from the factory as a flex fuel, but the GMC did, these are the GM parts I used to do the conversion these parts are for a double cab only.

 

20967866 Flex fuel sensor clip

13577429 Flex fuel sensor

23171538 Hose

20967834 Hose

23158923 Pipe

23171537 Pipe

 

If you were to do a Club Cab the two hose's would be different everything else is the same. Did not do a flash as the computer recognized the sensor.

What two hoses for a crew cab?

  • Like 1
  • 3 months later...
rastasquid Enthusiast

rastasquid

Posted
Posted

So is there any information to show that you DONT need a tune for the truck to recognize the sensor? People saying both ways in most threads I’ve found on various forums. Some guys saying they plugged the sensor in and the pcm read it, others saying that you need special programming. Sorry to bring back an old thread but looking for some info. Im looking to add Flex fuel to my 2017 5.3.

Black02Silverado Senior Enthusiast

Black02Silverado

Posted
Posted
11 hours ago, rastasquid said:

So is there any information to show that you DONT need a tune for the truck to recognize the sensor? People saying both ways in most threads I’ve found on various forums. Some guys saying they plugged the sensor in and the pcm read it, others saying that you need special programming. Sorry to bring back an old thread but looking for some info. Im looking to add Flex fuel to my 2017 5.3.

I'm pretty sure you have to go in and turn on the table part for E85 after adding the sensor.  When I installed the sensor on our 2016 Suburban, BB wanted me to send them a log file after I installed the tune so that they make sure the sensor was working and the ECM was reading it properly. 

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