Canadian Hummer Club Forums

Hi  . i am from  Canada. i have a  H3. i like  it  so much  except  the  radio.. i  prefer the better sound  quality. so  i am thinking about  buy a  new  radio.  so i come  here. i am  looking for  more  infor  about the  radio. thanking  for  your advice  or sharing

Installing a new radio in the H3 is a piece of cake. I had a double din in mine and used the GMOS-01 to hook it into the H3's wiring harness. GMOS-01 will retain your factory chimes, but will not retain onstar. GMOS-04 will retain your factory chimes and onstar.
 
There is some soldering required to hook up the new head unit's harness to the GMOS-xx, but then you just use the connectors on the GMOS unit to plug into the truck's harness - no splicing / cutting of the factory harness required.
 
You will also need the appropriate dash kit to mount the new head unit in the dash - they are typically under $20.
 
To remove the factory stereo stick your fingers in the 12v accessory outlets below the climate controls and pull the panel forward (towards the gear shift) - there should be 6 or 8 tabs which let go as you pull. Disconnect the harnesses from the panel - should be one for the climate controls, 4x4 controls, two for the 12v outlets, and one for the hazard switch. Unscrew / unplug the factory unit and then reverse the process to install your new radio.
 
Good luck!