/en/qa/tag/thar-gm5 Powered by Question2Answer /en/qa/106323/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 GMC /en/qa/106323/do-i-need-two-keys-for-a-2018-gmc-sierra-2500-diesel Thu, 04 Nov 2021 01:12:55 +0000