Riddle solved. One of previous owners mounted weird non original window's motor. I bought OEM GM and everything works.
You have had code B0803 earlier.
It means:
"Short to voltage in circuit to control unit terminal 10 (XR5)
Above condition must be fulfilled for at least 0.08 s .
or
Short to ground or interruption in circuit to control unit terminal 10 (XR5)
Above condition must be fulfilled for at least 0.08 s .
Concerned Terminals:
REC: 10 (XR5) "
Riddle solved. One of previous owners mounted weird non original window's motor. I bought OEM GM and everything works.
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