GM Service Manual Online
For 1990-2009 cars only

This vehicle is equipped with a Tire Pressure Monitoring System.

This vehicle has been engineered to operate up to the stated load capacity with wheel and tire assemblies of the type, size, construction, and configuration as originally installed. Maintenance of the tire inflation pressures is critical to the continued satisfactory performance, handling, and operating economy of the vehicle. Operation with incorrectly or improperly inflated tires can adversely affect vehicle performance and may contribute to the following:

    • Vehicle handling concerns
    • Poor fuel economy
    • Shortened tire life
    • Tire overloading

Inspect the tire pressure when the following conditions apply:

    • The vehicle has been sitting at least 3 hours.
    • The vehicle has not been driven for more than 1.6 km (1 mi).
    • The tires are cool.

Inspect the tires monthly or before any extended trip. Adjust the tire pressure to the specifications on the tire label. Install the valve caps or the extensions on the valves. The caps or the extensions keep out dust and water.

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

Inflation Pressure Conversion (Kilopascals to PSI)

kPa

psi

kPa

psi

140

20

215

31

145

21

220

32

155

22

230

33

160

23

235

34

165

24

240

35

170

25

250

36

180

26

275

40

185

27

310

45

190

28

345

50

200

29

380

55

205

30

415

60

Conversion: 6.9 kPa = 1 psi

Tires with a higher than recommended pressure can cause the following conditions:

    • A hard ride
    • Tire bruising
    • Rapid tread wear at the center of the tire

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

    • A tire squeal on turns
    • Hard steering
    • Rapid wear and uneven wear on the edge of the tread
    • Tire rim bruises and tire rim rupture
    • Tire cord breakage
    • High tire temperatures
    • Reduced vehicle handling
    • High fuel consumption
    • Soft riding

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

    • Uneven braking
    • Steering lead
    • Reduced vehicle handling

Refer to the Tire Placard for specific tire and wheel applications and tire pressures.