Turning on E67 Discrete inputs

[GSRegal99]

Here's some information on turning on the discrete input on an E67 for cruise. It is possible to turn on the discrete start request input as well, but I do not know the exact location at this time. I'll update this post once it's found.

GM used 3 different ways to trigger cruise on the E67 (that I know of).
CAN = 2
Single wire discrete = 1, Connector X1 Pin 29 (with a resistor ladder)
Three wire discrete = 0, Connector X1 Pins 21 (Resume/Accel), 22 (Set/Coast), 30 (On)

On OS 12630367 - 2009 Pontiac G6 the cruise bit is at 1D108B. (For my swap changed it from a 2 to a 0 for a 3 wire cruise switch).
On a 2009 CTS V and 2010 Colorado it's located here: 1D0A7B.

I pulled up those bin files and the string right before the cruise bit was the same (red is the cruise bit). 00 00 00 FF 00 02 (2 is the cruise type in this example). Hopefully that'll help you find it if your offset is different.

[Knackersjewels]

Any idea of other inputs that can be changed/added? like say, engine oil temperature, and discrete flex fuel signal?

[Knackersjewels]

And just adding, on the 2008 Acadia OS 12626281, that cruise byte is at 1D13F5

[zack4200]

Any idea of other inputs that can be changed/added? like say, engine oil temperature, and discrete flex fuel signal?

I don't know about enabling/disabling them, but I recently went through a bunch of E67 pinouts and made a spreadsheet on Google Sheets comparing the differences... Should give you a pretty good idea of the different inputs/outputs available. There might still be some more that are still missing, I haven't gone through every vehicle/platform that uses the e67. If anyone wants to add to it, feel free to request editing permission.

There are also few other tabs with similar comparisons for other PCMs, most of it was inspired by ejs262's post with p04 pinouts either here or at gearhead-efi (or both? lol).

[Knackersjewels]

Thanks, I'll have to do some diving. I know there is a flex fuel discrete pin on x1-5, and in your 09 CTSv LSA, it's got engine oil temp, so I may have to get some more hpt credits, and have a play around. Would be very nice to add boost control options to factory NA setups