Identifying what year L86 I have

[Totallymetal]

I bought a pullout L86 with 8l90, ECM, TCM, engine/transmission harness and gas pedal. I do not have the vehicle VIN. I can?t find info on how to decipher the laser etched ID numbers on the block. I was told it was from a 2017 Escalade. However, I am seeing a significant difference between the downloadable tunes. 2016 is 2 credits, and 2017 is 4. There must be a difference between them. So, it must be important to know the exact year of the vehicle.

Can anyone steer me in the direction of identifying the actual year. I have the MPVI2 ordered... I am hopeful that the free VCM Suite 4 will tell me the actual VIN.

[TCSS07]

you should always make sure all parts are compatible but the credit difference is because gm stepped up there coding game with the ecms now so its harder/more labor to unlock them so hptuners is charging an extra 2 credits now to do so

do you have any vin number? the year will be the 10th letter/number from the left 2017 = H, 2016 = G, 2015 = F for example

[Totallymetal]

you should always make sure all parts are compatible but the credit difference is because gm stepped up there coding game with the ecms now so its harder/more labor to unlock them so hptuners is charging an extra 2 credits now to do so

do you have any vin number? the year will be the 10th letter/number from the left 2017 = H, 2016 = G, 2015 = F for example

Unfortunately I don?t have the VIN, that would have made it too easy.

[TCSS07]

well when you get the hptuners and read the ecm file - in calibration details in the same row of open,save,close (right next to close) - click it and it will open and will bring up a chart which will tell you the full vin then just match it up to what i posted to get the year
you also do not need to license a file to read to the ecm - you just cant make changes and save them

[IARLLC]

I can think of 1 difference between 16 and 17 L86. The high pressure fuel pressure sensors on the back of the fuel rails have 4 terminal plugs on 2016-earlier while 2017-later have 3.

[Totallymetal]

Thanks a ton, I wasn’t sure if the tuner would give me the VIN info or not... I had read about the pressure reg wires, but could only find it once and couldn’t remember where that info waslocated again. If I am looking at the correct spot on the driver rear of the intake between it and the block. It’s Brown w/red, blue w/white and black w/green. That connector has 3 wires.

[IARLLC]

I don't have wire diagram info with me right now but yes, the sensor screws into the back of the driver's side fuel rail. Sounds like you have a 2017.

[ZeroBoostBuick]

What TCSS07 said...

Download the tune from the ECM. And under Edit / Calibration Details will tell you the VIN, the Car model and year.

You only need to spend the credits to modify and re-flash the tune. You can upload as many as you like with out spending a dime.