I have a 1970 El Camino with a LS1 and a4L60E transmission and a 2002 Escalade computer .Since I am not proficient with the tuning program I have had 3 different programmers try to correct the issue. With that said the issue is when I am stopped in drive the transmission starts in first gear with no shifting problems. Once I stop and manually shift to first gear the transmission automatically starts in second gear. I have not been able to figure out the problem. I also tried a 2002 Avalanche computer but with the same program without any luck. Any help will be appreciated.