Im looking for any information to help me figure my problem out. 2006 Silverado LS Ext. cab 4x4. Just recently purchased. Ran fine when i bought it. took the bed off to clean the excess mud off of everything (It was bad...) Put the bed back on go to leave work and the Brake & ABS warning light are on, wont shift out of first in drive, Can get to second if I manually shift to 2nd, no 3rd even if I manually shift it, no speedo. I changed the rear wss no fix. pulled the codes and its giving me a code for each of the wss. HELP!!!! Im going crazy trying to fix it.

 

probably missing a vehicle speed sensor input. check for connectors not plugged in at the tcase.