Why is my GMC Sierra not moving in any gear?
Why is my GMC Sierra not moving in any gear? It is pretty applicable to the 4L80E as well. Not Moving in any Gear – If your 2003 Sierra Transmission has a problem moving in any gear, it’s likely caused by a lack of transmission fluid. No matter how silly that sounds, and how convinced you are that it’s not the problem, go ahead and check it anyway. Are there transmission problems with a 2003 GMC Sierra? After five years, most of the issues with these trucks had been worked out. Now, these trucks are getting older, and it’s very...