| Subject: | Speed and Mileage Limitations for Spare Tire Use | 
| Models: | 2004-2005 Chevrolet Colorado | 
| 2004-2005 GMC Canyon | 
| with Z71, ZQ8 or Z85 Chassis Package | 
Refer to the chart below for option codes and affected tire/wheel combinations.
Option Code  | Standard Tire  | Spare Tire  | 
|---|---|---|
Z71  | P265/75R15  | P235/75R15  | 
ZQ8  | P235/50R17  | P205/75R15  | 
Z85  | P205/75R15 P225/75R15 P235/75R15  | P155/90R16  | 
Vehicles with the option groups listed above may be equipped with spare tires, and/or wheels that are a different size than the standard tire/wheel combinations. These spare tires should be considered "limited use" only and the following recommendations should be observed:
| • | DO NOT exceed 100 km/h (62 mph) on the spare tire. | 
| • | DO NOT drive for more than 800 km (500 mi) on the spare tire. | 
| • | DO NOT drive in four wheel drive mode (if equipped) while using the spare tire. | 
| Notice: Exceeding the recommended speed/distance recommendations or driving in four-wheel drive mode (if equipped) may result in increased wear and shorter service life of axle components. | 
You may supply the customer with a copy of this service bulletin.