One problem related to radiator has been reported for the 2002 GMC Blazer. The most recently reported issues are listed below.
From a complete stop the vehical was turned around to pull into a parking area. The front bumper hit a tree stump where the license plate mounts. The vehical was moving less than 5 miles per hour, the air bags did not inflate. The bumper was cracked and more importantly the bumper brackets are mounted to the radiator which also broke. So this poor design of having the bumper mounted to the radiator caused aproximatly $1800. 00 worth of damage.