Shift Ranged Inhibited
I've had quite a few "shift range inhibited" faults with no check engine light lately preventing me from going into reverse. Cycling the key switch a few times usually allowed a reverse shift. I replaced the NSBU gear selector and thought that cured the problem, but two days later the fault came back with a check engine light, and this time there was no clearing it. I rolled the truck down the driveway and headed to my local dealership in all forward gears. The fault code was a PO743 and the torque converter clutch solenoid was replaced and I've been good for over a month now. $336.00 out the door. The tech told me that on this particular transmission that reverse gear is controlled by the afore mentioned solenoid.
2005 Chevy 2500HD, CC, SB, 4X4, Duramax, ARE Topper, 60 gallon RDS toolbox/tank combo, Kennedy Headlight Booster, Isspro pyrometer and boost gauges, EGR Blocker, PCV Kit, Bilsteins, 265 Michelin MS-2, TTS Exhaust, pulling 35' Jayco travel trailer.