Ok this might just be a simple fix i hope. Yesterday i dropped my tranny pan down and changed my trans fluid and filter. Now this morning i start my truck up and pull out of my driveway put it into drive. Its acting all sluggish. I scanned the computer with a code scanner and it says code PO758 "Shift Solenoid B Circuit Electrical". Whats up with this i know very minimal about transmissions so i'm hoping one of you guys can help me out. I've got a 1997 GMC C1500 Extcab i got the 4L60E and the 5.7 liter. What the hell is wrong with this thing? I can't get this thing anywhere Cuz i'm doing 2500 RPMS at just 45 MPH.

 

when you were taking out the pan you probably slid the pan across one of the rear solenoids and unplugged it. i have seen this before, its pretty easy to do. drop your pan again before you do anything else.

 

Check this tread out it has some pictures of what probably happened.https://www.performancetrucks.net/fo...d.php?t=366980

 

-echo-

 

check your solenoids... probably knocked a plug loose somewhere.

 

I know but there was a pretty killer pic there to show the problem. Sorry for the echo LOL. You were 100% right. Just tryin to hook a brother up! Take care, Vince.

 

I was just kidding. That was a good pic. Take care man.

 

found the problem it was a loose connector thanx for the help guys