Hello and thank you for choosing Just Answer.
2005-06 ESCALADE, SUBURBAN, TAHOE, YUKON, YUKON DENALI, YUKON XL
To reset the CHANGE ENGINE OIL message:
Turn the ignition key to RUN with the engine off
Fully press and release the accelerator pedal slowly three times within five seconds. If the OIL LIFE RESET message flashes for 10seconds, the system is resetting
Turn the key to LOCK.