HUD English/Metric Input

The HUD can display the speedometer in either English (MPH) or metric (km/h) units. If the HUD control module detects a high (open) condition at terminal 7, the speedometer is displayed in English units (MPH). On vehicles with RPO Z49, the following actions occur:
^ Terminal 7 is connected to G201 through CKT 1450 (BLK).
^ The HUD control module detects a low (ground) condition.
^ The speedometer is displayed in metric units (km/h).