1994 GMC Sierra Transmission?

[Zak]

I have a 1994 GMC Sierra that wont go into drive or reverse, when gas pedal is pressed it reeves as if it is in neutral. Ive checked in it 4 HI and Low and the results are the same. There is fluid in there also.

 

[Molson02536]

I have a 1994 GMC Sierra that wont go into drive or reverse, when gas pedal is pressed it reeves as if it is in neutral. Ive checked in it 4 HI and Low and the results are the same. There is fluid in there also.

No movement in any gear: pump failure, or total loss of fluid. R&R, or refill pan and find the leak. If out of fluid, avoid running the engine until the trans is refilled to avoid pump damage. To check for pump failure, check fluid level with the engine off, then start the engine and recheck fluid level. If level does not go down when engine is running, the pump is broken.