98% of the manual shift gmt400 trucks come with the 5 spd man trans especially the 4x4 models. As to your truck in particular... the options you listed and the appearance of the truck say 5 spd. Now if it was rubber floors with manual windows n locks no tilt or cruise then I could see the 4 spd being in it. Unless there's more to the story I'll stand by the 5 spd option. Blue Mule
That's better. Not a rare truck at all. 454 yes. 4 speed no that's been changed out. Factory is 5 spd. The rest of the things you noted seem to be stock. Including the headlight/grille assembly. That shows that it's a higher trim level...pw,pl... means better truck. Blue Mule
This is some awesome info. Great idea!!! I'll look into doing this to my 91 rcsb 4x4 that I'm retrostoring. I'm also considering some updated mirrors as I want power,heated,folding two mirrors that will mount using the factory mounts Sent from my SM-G975U using Tapatalk