2011 GMC Savana 3500 Passenger Owner's Manual - Page 339

Vehicle Care Notice: Use tire chains only where legal and only when you must. Use chains that are the proper size for the tires. Install them on the tires of the rear axle. Do not use chains on the tires of the front axle. Tighten them as tightly as possible with the ends securely fastened. Drive slowly and follow the chain manufacturer's instructions. If you can hear the chains contacting the vehicle, stop and retighten them. If the contact continues, slow down until it stops. Driving too fast or spinning the wheels with chains on will damage the vehicle. For Cutaway models with LT245/ 75R16, LT225/75R16 or LT215/ 85R16 size single or dual rear tires, use Low Profile Z-Chain or SAE Class S cables. For Cargo or Passenger models with P245/70R17, LT225/75R16 or LT245/75R16 size tires, use Low Profile Z-Chain cables. SAE Class S chains are not recommended. If the vehicle has dual rear tires, do not use individual tire chains. Use tire chains that fit across both dual tires. 10-73 If a Tire Goes Flat It is unusual for a tire to blowout while you are driving, especially if you maintain the vehicle's tires properly. If air goes out of a tire, it is much more likely to leak out slowly. But if you should ever have a blowout, here are a few tips about what to expect and what to do: If a front tire fails, the flat tire creates a drag that pulls the vehicle toward that side. Take your foot off the accelerator pedal and grip the steering wheel firmly. Steer to maintain lane position, and then gently brake to a stop, well off the road, if possible.