See also:

Total Weight on the Vehicle’s Tires
Be sure the vehicle’s tires are inflated to the upper limit for cold tires. These numbers can be found on the Certification/Tire label. See Loading the Vehicle. Make sure not to go over the GVW ...

Engine Heater
The engine coolant heater, if available, can help in cold weather conditions at or below −18°C (0°F) for easier starting and better fuel economy during engine warm-up. Plug in the coolant hea ...

Current and Past Models
Technical Service Bulletins and Manuals are available for current and past model GM vehicles. ORDER TOLL FREE: 1-800-551-4123 Monday – Friday 8:00 AM – 6:00 PM Eastern Time For Credit Car ...