Climate Control Unit

The A/C condenser fan does not run at high speed (but both fans run at low speed and the A/C compressor operates with the A/C on)

A/C condenser fan high speed circuit troubleshooting A/C Condenser Fan High Speed Circuit Troubleshooting

Also check for

Climate control unit DTCs How To Troubleshoot The Climate Control System

Also check for

Blown fuse No. 6 (30 A) and No. 15 (7.5 A) in the under-hood fuse/relay box

Also check for

Poor or loose connections at the terminals