The tachometer displays the engine speed in revolutions per minute (rpm).
Notice: If the engine is operated with the tachometer in the shaded warning area, the vehicle could be damaged, and the damages would not be covered by the vehicle warranty.
Do not operate the engine with the tachometer in the shaded warning area.
Chevrolet Cobalt Service & Repair Manual. Wheel Alignment
Preliminary Inspection
1.
Ensure all tires are of recommended
size and are inflated to proper pressure.
2.
Inspect all tires for damage and uneven
tread wear.
3.
Ensure wheel bearings, control arm
...