GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Spark 🢒 Suspension 🢒 Tires and Wheels 🢒 Tire Diagnosis - Irregular or Premature Wear
  1. Measure the depth of the tire tread.

    2. Object Number: 1223335 Size: SH
  2. Indicators appear when the tire tread depth becomes shallow, less than the depth of the tread wear indicator (a).

    3. Specification
    The depth of the tread wear indicator is 1.6 mm (0.06 in).

  3. If the depth of the tread is below the specified value, replace the tire.

Tire Wear
Object Number: 386773 Size: SF
(1)Under-Inflation, Hard Cornering, Lack of Regular Rotation
(2)Incorrect Wheel Alignment, Hard Cornering, Lack of Regular Rotation
(3)Incorrect Wheel Alignment
(4)Over-Inflation, Heavy Acceleration, Lack of Regular Rotation
(5)Normal Wear to the Wear Indicator