2017 L96 Swap into 2009 GMC1500

[chase1873]

TLDR: With a stock calibration file and stock motor the fuel trims are 20ish percent off during normal driving but appear to be correct at WOT. What am I doing wrong?

I purchased a 2017 L96 from a GMC Savana 3500 and installed this motor in my 2009 GMC Sierra 1500.

Original motor was an 5.3L LMG (vin 0) with an E38 pcm and 4L60.

I kept the stock E38 pcm and 4L60 and I added two wires to the ECU to control the VVT. J2 connector: Purple wire Pin 16 Sol Control and Tan wire Pin 52 Low Ref.

The MAF and TB from the 2017 Savana L96 were different connectors than my stock truck, so I used my stock MAF and TB.

I copied a stock Tune from the repository from a 2010 Yukon XL 2500 with an E38pcm and L96. From checking part numbers, I believe the Yukon has the same MAF and TB as my 09 1500.

The truck runs and drives with this file, but the fuel trims seem to be off quite a bit. What am I missing? Shouldn't this stock file work?

The hybrid file I drove with:
09GMC1500_Stock2010_yukon_6.0L_stock_c6_Corvette_trans.hpt

The L96 Yukon File from repository I copied from(search L96):
2010 Yukon L96 Stock - 1275219713.hpt

Stock 09 5.3L file from my truck
2009 GMC 1500 LMG Stock - Chase.hpt

A log from my hybrid file:
6.0_yukon_vette.hpl

Photo of VVT wire addition:
262400120_922620065126029_6042228481074735085_n.jpg

[kevin87turbot]

Are you running the L96 injectors?
It's certainly adding a good amount of fuel across the board.

[chase1873]

Are you running the L96 injectors?
It's certainly adding a good amount of fuel across the board.

I am using the L96 injectors and intake manifold. The only hardware changes are I am using the stock 2009 1500 exhaust manifold, cold air intake, throttle body, and mass air flow sensor. I believe the TB and MAF to be the same though.

The Long block, intake manifold, injectors, coil packs, knock sensors, cam/crank sensor, all of it is L96.

I believe I copied the L96 injector data.

[chase1873]

This is really confusing.

The fueling is adding 20ish percent everywhere during normal driving.

However, If you go WOT it is like 0.9 ish on both 02 sensors.

That kinda says the injector data is correct. Or it would be lean WOT also.

That kinda says the 02 sensors are correct, they are pretty consistent and even WOT.

That kinda says the MAF is correct. Above 4000 rpm in a stock tune and during PE it?s heavily MAF based fuel not VE.

I also unplugged the MAF and if basically ran exactly the same during normal driving.

Completely confused.

Any suggestions?

Log with WOT
6.0_yukon_vette.hpl

Screen shots, maybe my histogram is wrong?
262119974_1484566635248705_3605386270347931946_n.png262202275_6534815569923178_7448017694788316446_n.png

[kevin87turbot]

This is really confusing.

The fueling is adding 20ish percent everywhere during normal driving.

However, If you go WOT it is like 0.9 ish on both 02 sensors.

That kinda says the injector data is correct. Or it would be lean WOT also.

That kinda says the 02 sensors are correct, they are pretty consistent and even WOT.

That kinda says the MAF is correct. Above 4000 rpm in a stock tune and during PE it?s heavily MAF based fuel not VE.

I also unplugged the MAF and if basically ran exactly the same during normal driving.

Completely confused.

Any suggestions?

Log with WOT
6.0_yukon_vette.hpl

Screen shots, maybe my histogram is wrong?
262119974_1484566635248705_3605386270347931946_n.png262202275_6534815569923178_7448017694788316446_n.png

If you run in MAF only mode, do the fuel trims get better?
Is the VVE table for the original 5.3L?

[chase1873]

MAF only mode looks the same.

The VE table is from the L96. I copied nearly all tables from the L96.

[kevin87turbot]

That is odd that it's that far off. However, you should be able to get it dialed in pretty quickly with just a little tuning.

[chase1873]

That is odd that it's that far off. However, you should be able to get it dialed in pretty quickly with just a little tuning.

I guess at the end of the day, i dont want to spend the time calibrating all these tables just to find out they were correct and something was wrong.

If they need to be calibrated, then so be it.