1998 GMC Envoy Owner's Manual - Page 106

To reset the trip computer, press the MODE and US/MET buttons simultaneously for at least two seconds. All functions will be displayed for half a second once the system is reset. Reset can only be performed in the AVG ECON, FUEL USED and AVG SPEED modes. All three modes are reset simultaneously. Center Floor Console Your vehicle has a console between the two front bucket seats. Sunglasses Storage Compartment To open the console, pull up on the console cover. The console has two cupholders and a storage tray, including a change holder, for the front seat passenger and driver to use. The console has a sunglasses storage compartment. 2-45