2006 Chevrolet Uplander LT "cade display" Questions

...Any clues I dont have a lot of money to spend a a dealer can they diagnose this stuff? I have a cade reader but it will not recoggnize my uplander any more it did last weeK? could this be the BCM ...

cade in the computer indicating a ASD reply problem may cause the pump not to run. Turn the key on and off three times and leave it on the last time and the check engine light will flash out the codes