Here is 4th gear ratio reference: 11506-4l80e-question
Here is 4th gear ratio reference: 11506-4l80e-question
Yes the connector schematic I obtained while trouble shooting was the correct one for the tune and shows 4L80E and 4L60E options on the G3500 van T42 TCM. Everything else seems to be in the same spot as in the T42 Connector on the sloppy mechanics page. I'll verify again on GM site to make sure and convert them to images instead of PDF so I can upload on EFILive
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Well the main difference I see for now is that the 2009 T42 Connector has 3 sets of the GMLAN Serial Bus signals coming to it while the older Connector shows only 2 sets. Would that cause any issues? the Circuit number for them all is 2500/2501 ... the only other changes are the TFP Switches (A,B,C) and where the ISS Low signal is terminated (26 vs. 45).
If I was to add the two GMLAN signals to 15 and 19, can I just jump it off of the other pins or is there a chance that these area headed somewhere else? Ofcourse I have to verify with my year's connector be I say this is it. Haven't got access to the site yet.
Here we are!!! Everything converted to JPG so I can upload them
2009 G3500 Transmission Connector
2009 G3500 T42 Connector
2009 Silverado Transmission Connector
2009 Silverado T42 Connector
Here's an easier pic with comparisons of each connector...
2009 G3500 vs. Silverado T42 Connector Comparison
2009 G3500 vs. Silverado Transmission Connector Comparison
Last edited by Mean Green Z28; January 13th, 2017 at 07:51 AM.
Originals in pdf for those who like to keep good paperwork
2009 G3500 VAN T42 Connector Pinout.pdf
2009 G3500 VAN Transmission Connector Pinout.pdf
2009 Silverado 4L60E Transmission Connector Pinout.pdf
2009 Silverado T42 Connector Pinouts.pdf