Availability: 6 in stock
Factory part number 86790201: an outer rail supplied by GM.
It is catalogued under Braces & Reinforcements > Crossmembers & Braces. Build notes: Fixed glass roof.
Structural parts are the least forgiving category here, and a crossmember from a different wheelbase will not put the transmission mount in the right place.
Handed to the carrier within one to two business days from our US warehouse, free over $59. Confirm the number before you order, because a near match will bolt on and still be wrong. Send the VIN if the old marking has gone.