I have a 96 S-10 Blazer with a 4.3L and a 4L60E trans. I have a check engine light that keeps showing up, Shift Sloenoid A Electrical. I have changed solenoids A & B, the filter the fluid the lock up solenoid and even cleaned the electrical connections with Brake Clean. Reset the computer numerous times and the same code pops back up. When I reset the computer the trans shifts perfect, but as soon as the check engine light comes on its revs high before shifting into second, sometimes it acts like its in neutral when it shifts to second, and sometimes its simply slips when its finds second gear...? Any ideas?

 

Im kinda having the same prob but my wont go into 2nd gear at all besides the slipping really really baddley sounds like the tranny is burning out but thats just my thoughts