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2020 GMC Sierra THAR-GM6 or THAR-GM7??

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So one day I checked for the T-harness options and downloaded the install gudie for a 2020 GMC Sierra and it indicated a THAR-GM6.  Literally the next day it was the THAR-GM7 and it was also refelcted in the install guide.  What is the actual differance and does the THAR-GM6 not work, or can it still be used?  

Also, does the "standard key" install also work the push to start?
asked Sep 14 in GMC by jamber (210 points)

1 Answer

+1 vote
Best answer
We have not tested the 2020 push-to-start version yet. So it is not currently supported.


GM7 is the correct harness for a 2020 1/2ton standard key: https://fortin.ca/en/products/t-harnesses/thar-gm7/vehicles.html


GM6 is for push-to-start gm vehicles: https://fortin.ca/en/products/t-harnesses/thar-gm6/vehicles.html
answered Sep 15 by Derek (191,280 points)
selected Sep 15 by Robb