2002 GMC Sonoma Owner's Manual - Page 154

Variance is the difference between magnetic north and geographic north. In some areas, the difference between the two can be great enough to cause false compass readings. If this happens, follow these instructions to set the variance for your particular location: 1. Find your location on the zone map earlier in this section. Record your zone number. 2. Press and hold both the MODE and the US/MET buttons in the COMP/TEMP mode. 3. After five seconds, the compass will acknowledge the variation mode by displaying the current zone number. When it does, release both buttons. 4. Press US/MET until your zone number appears on the display. 5. Press MODE to enter your zone number. Your variance is now set and the display will return to the COMP/TEMP mode. TRIP: Once in the TRIP mode, pressing the MODE button will step you through the following TRIP functions: D AVG ECON (Average Economy): The average fuel economy since the last reset is displayed. D INST ECON (Instantaneous Economy): Instantaneous fuel economy for the last second of driving is displayed. distance that can be travelled with the remaining fuel in the tank, based on the fuel economy for the last few hours of driving. displayed. D RANGE: The display indicates the estimated D FUEL USED: The fuel used since the last reset is D AVG SPEED (Average Speed): The average speed since the last reset is displayed. To reset the trip computer, press the MODE and US/MET buttons simultaneously for at least two seconds. All functions will be displayed briefly 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. 2-84