Start with flushing both heater cores. The rear one may be plugged with crud.
The 2002 Chevrolet Suburban has rear wheel drive.
The 2002 Chevy Suburban features speakers which are 6 and a half inches. This size applies to both front and rear speakers.
The 2002 Chevrolet Suburban has 65.1 in. of rear shoulder room.
The 2002 Chevrolet Suburban has 39 in. of rear head room.
The 2002 Chevrolet Suburban has 39.1 in. of rear leg room.
The 2002 Chevrolet Suburban has 61.6 in. of rear hip room.
The rear track of the 2002 Chevrolet Suburban is 5 ft. 6 in. (66 in.).
Most likely the rear expansion tube or valve is defective.
may be on frame rail pass. side front of rear tire inboard of frame
If it is a 2-wheel drive then it has 2 axels in the rear and the 4-wheel drive has 4 axels. in the rear and 2 in the front.
The front speakers in a 2002 Chevrolet Suburban measure 6 1/2 inches and are located in the doors. The rear speakers also measure 6 1/2 inches.