Power steering tilt issue only works downward?

Yes, there are TSBs on this problem, check the images below.

Group: ELECTRICAL

Number: 11-BE-003

Date: JANUARY 2011

Model: 2009-2011 GENESIS

Subject
(UPDATE) STEERING WHEEL POWER TILT & TELESCOPE LIMIT SWITCH AND MODULE REPLACEMENT

This bulletin supersedes TSB 10-BE-002-1 to revise production date ranges and include secondary repair procedure.

DESCRIPTION:

This bulletin provides the service procedure to repair inoperation of tilt and telescope adjustment for BH Genesis vehicles.

NOTE:
Use Service Procedure A (for vehicles produced before November 10, 2009) to replace external limit switches.

NOTE:
Use Service Procedure B (for vehicles produced November 10, 2009 and later) to replace tilt/telescope module.

NOTE:
When replacing the tilt/telescope module (Service Procedure B), be sure to perform the GDS actuation tests and confirm proper operation of IMS system.

APPLICABLE VEHICLES:

Model - 2009-2011 (BH) Genesis W/ Power Steering Tilt/Telescope Column

Production Range - April 25, 2008 July 24, 2010

Check out the diagrams (below). Please let us know what happens.

The part numbers are on the second diagrams in the images above.

Yes, it does sound right, they have some kind of reconfiguration of the wiring harness.