2006 Pontiac GTO Owner's Manual - Page 83

One to Four Shift Light (Manual Transmission) After shifting to FOURTH (4), you may downshift to a lower gear if you prefer. Notice: Forcing the shift lever into any gear except FOURTH (4) when the 1 TO 4 SHIFT light comes on may damage the transmission. Shift only from FIRST (1) to FOURTH (4) when the light comes on. This light will come on when: • The engine coolant temperature is higher than 169°F (76°C), Instrument Panel Cluster Trip Computer • you are going 15 to 19 mph (24 to 31 km/h) and • you are 21 percent throttle or less. See One-to-Four Shift Light (Manual Transmission) on page 3-26 and Trip Computer on page 3-33 for more information. When this light comes on, you can only shift from FIRST (1) to FOURTH (4) instead of FIRST (1) to SECOND (2). The light will be displayed on the instrument panel cluster and a message will be displayed on the trip computer. You must complete the shift into FOURTH (4) to turn off this feature. This helps you get the best possible fuel economy. 2-23