GM Service Manual Online
For 1990-2009 cars only

The pressure recommended for any model is carefully calculated to give a satisfactory ride, stability, steering, tread wear, tire life, load carrying capacity, and resistance to bruises.

The metric term for tire inflation pressure is the Kilopascal (kPa). Tire pressure may be printed in both kPa and psi. One psi equals 6.9 kPa.

Refer to the following tire pressure conversion chart for equivalent kPa-psi measurements:

kPa

psi

140

20

145

21

155

22

160

23

165

24

170

25

180

26

185

27

190

28

200

29

205

30

215

31

220

32

230

33

235

34

240

35

250

36

275

40

310

45

345

50

380

55

415

60

Conversion: 6.9 kPa = 1 psi


Object Number: 175269  Size: SH

Refer to the tire placard located on the left door lock pillar for the tire inflation specifications.

Tire pressure, with tires cold (after the vehicle has set for three hours or more or driven less than one mile), should be checked monthly or before any extended trip. The front and rear tires require 220 kPa (32 psi) of air. It is normal for the tire pressure to increase 28 kPa (4 psi) when the tires become hot during driving. Do not bleed or reduce tire pressure after driving. Bleeding reduces the cold inflation pressure.

Keep valve caps on the valves in order to keep dust and water out.

Tires inflated to higher than recommended pressure can cause the following conditions:

    • Hard ride
    • Tire bruising or carcass damage
    • Rapid tread wear at the center of the tire
    • Reduced handling

Tires inflated to a lower than recommended pressure can cause the following conditions:

    • Tires squeal on turns
    • Hard steering
    • Rapid and uneven wear on the edges of the tread
    • Tire rim bruises and rupture
    • Tire cord damage
    • High tire temperatures
    • Reduced handling
    • Reduced fuel economy

Unequal tire pressure on the same axle can cause the following conditions:

    • Uneven braking
    • Steering lead
    • Reduced handling
    • Swerving on acceleration