2010 Cadillac CTS Owner's Manual - Page 272

8-32 Driving and Operating CTS-V vehicles use tracer lights around the outside of the tachometer as a performance up-shift light. These tracers flash to indicate when to shift to the next higher gear to avoid the engine speed limit. See Tachometer on page 4‑17 for more information. Up-Shift Light Drive Systems All-Wheel Drive With this feature, engine power is always sent to all four wheels. It is fully automatic, and adjusts itself as needed for road conditions. When using a compact spare tire on an AWD vehicle, the system automatically detects the compact spare and disables AWD. To restore AWD operation and prevent excessive wear on system, replace the compact spare with a full-size tire as soon as possible. See Compact Spare Tire on page 9‑102 for more information. CTS vehicles with a manual transmission have an up-shift light on the instrument panel. This light shows when to shift to the next higher gear for the best fuel economy. When this light comes on, you can shift to the next higher gear if weather, road, and traffic conditions allow. For the best fuel economy, accelerate slowly and shift when the light comes on. While you accelerate, it is normal for the light to go on and off if you quickly change the position of the accelerator. Ignore the light when you downshift. Skip Shift (CTS-V) Under light acceleration, the transmission will only allow you to shift from 1 (First) to 4 (Fourth). Shifts from 1 (First) to 2 (Second) or 3 (Third) are not allowed. This helps improve fuel mileage. Under harder acceleration, Skip Shift is disabled, and the driver has all gears available.