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. Blower Motor Relay R & R
Refer to Fig. 1
when performing the following procedure.
1.
Disconnect the blower motor resistor
electrical connector.
2.
Unsnap the blower motor resistor from
the HVAC module and remove.
3. ...