94 Chevrolet 1/2 4X4. I determined thru searching this site that the shifting is electronically controlled but we suddenly have a problem with the truck not shifting to 1st gear when it slows down or stops. As a result if you put it in drive it starts out in 3rd and if you move the selector to 1st or 2nd it will start out in 2nd. What I don't know is if the electronics also control which gear you start out in . Thankyou for your help. Norm

Sounds like the shift silenoid the tranny isnt working .You can oull the codes and it will tell you withc one isn't working

Disconnect the battery for about 5 minutes then try it again

You need to hook it up to a REAL scanner(not autozone or walmart, a $7000 snapon or otc) Then see if the computer is commanding 1st or second gear, then you can determine if the problem is internal or external.

I have actually seen a bad MAF sensor causing those symptoms(i'm not saying this is your problem, i'm just showing you that tons of things could effect the shifting)

Brendan