The GMH32T T-Harness is used to convert GM 32-Pin connector found on select radios to a 9-Pin connector. With this cable installed you can connect CD Changers Interfaces, iPod interfaces, auxiliary input adapters etc. behind the factory radio. (if vehicle is prewired, you must disconnect factory cable).
This cable may also be used in Buick's and/or Oldsmobile's that are not prewired. This T-harness is like a short version GM 12344003 harness.