Sue,

Chains only go on the rear wheels of a Suburban (at least from the 07 manual). Those are the primary drive wheels and have sufficient clearance for the chains. Putting chains on the front wheels would be hard on the drive system, could damage the steering and could result in loss of control due to too little traction on the primary drive wheels.

Add some weight to the rear of the vehicle and make sure the chains fit well before you need them. Stay below 30 mph when using chains and don't run them on cleared (no snow/ice) roads, it is hard on the vehicle and can quickly lead to chain failures.

If you have studded snow tires and 4WD you really shouldn't need chains unless you are going through some really, really serious snow and ice. Go slow, plan ahead, and drive where your tires can get some traction. The biggest challenge I recall from driving in W. Washington after a snow or ice storm was all those cars stuck all over the place.

- Eric