1999 gmc yukon, installed refreshed engine, nothing special other than stage 2 summit racing cam. also installed new jasper trans, since installation the truck no longer starts with the key, ran a push button to get the truck to start but it will not shift. put into drive and it is automatically in 3rd gear according to scan tool data, scan tool data shows the change in gear selection when manually shifting but no change in the actual gear of the trans, also noticed the dash only lights up the gear indicator intermittently and with the key in a unique position,( partially between acc and crank) just looking for any tips, we are pulling our hair out after spending close to 5k on this rig. any help is appreciated