08 yukon p2797 code
 

my 08 yukon with 227000 ish miles is throwing p2797 code over and over as i clear them and watch what comes back.
it consistantly returns amung a few other but it does have issues going from engine to idol stop even not allowing any forward movemant until you clear and restart .it runs fine i. engi e mode with most if not all engine codes being thrown at the 800 rpm area tryi g to reingaauge idol stop mode .
anyone replace there aux trans pump and where did they buy the part amd what part number?