Rear Window Wiper Arm is a direct fit for the following:

2004-2006 Buick Rainier
2002-2006 Chevrolet Trailblazer
2002-2006 Chevrolet Trailblazer EXT
2002-2006 GMC Envoy
2002-2006 GMC Envoy XL
2002-2004 Oldsmobile Bravada

Genuine GM Part Number: 15908046