First thing in the morning when heading to work, car starts up on first turn of the key. When returning to the car when going home from work it does not catch on and I have to use starting fluid to get the engine to turn over. The MAF sensor has been cleaned and the throttle body is clean. Tje battery and starter are fine. What cab I do to get good consistent starts on my suburban?

 

Welcome to the forum.

Check fuel pressure with the key on, engine off and with the engine running.