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Do I need two keys for a 2018 GMC Sierra 2500 Diesel

Hi, I"m Looking at adding the fortin Evo all to my truck and i wanted to confirm two things. Firstly when i go to flash the module it says for the T harness THAR-GM5 but fortin gives you instructions for the t harness THAR-GM7 and theres not option to select the GM7 only the 5 could i still use the 7 and flash it as the 5. My second question is do i still need two keys to program or would i be able to just use one

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2020 GMC SIERRA 3500 Diesel

Will the THAR GM 7 work using the guide# 91061 on a 2020 diesel? I'd suppose it's the same wiring and programming of a 1500 just turn on diesel mode maybe?

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What settings for 2003 GMC Sierra Diesel - EVO ONE

Have the EVO-ONE and FLASH-LINK 4. Couple of things: 1. Want to set up for remote start with factory key (lock 3x). Do I have to add a RF-KIT to this? If not, do I have to choose one in setup? In Wizard mode, seems to force you to pick a RF-KIT. 2. Truck is a diesel. Found the Pro Mode in settings. Is there anything special regarding Tach or any other settings for diesels that I need to change? 3. The install guide recommends version 70.26. It default wants to install 70.18. When I go to look at other available firmwares, it does not offer 70.26 as an option. (70.28 is the closest). Any reason to not install the latest firmware (70.39 is the highest at the time I write this). Thanks, B

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