1995 chevy not going into reverse

I have a 1995 GMC Sierra SLE Ext.Cab with a 5.7 L 4x4 and it has no reverse its an automatic trans. What could be causing this to happen?

I have the same problem, ALL forward gears apply and pull hard. When placed in reverse it feals like it is engaging but won't pull. Probable cause low fluid pressure. I found several resources that said to try Lucas trans fix or remove the reverse check ball from the valve body. As soon as I find out which check ball is the rev. I will try it and let you know. If you can help let me know.

I recently rebuilt a 4l60e and after extensive research and several conversations with highlyexperienced mechanics, the most common cause of no reverse is the sun shell suffers damage inside the the transmission. This a total rebuild job. I think you may see other effects on the forward gears , even if slightly. My trans had no reverse but the problem turned out to be burnt reverse clutch packs and a bad intermediate gear carrier. Good luck!

Check link to trans to see if is working when you select it to reverse are could be trans pump in the trans may need to rebuild the trans