Which wiring harness?
 

Okay I'm sure this is probably been asked a million times already but I have a 2007 HHR without Pioneer and without OnStar and I want to replace the factory radio. So I went to Best Buy and they told me the wiring harness is $100 but when I look online Sonic Electronix has a very basic harness for 11 bucks. I don't care about keeping my door chimes or Warnings or anything like that I just want to know if I can use the cheap harness. https://www.sonicelectronix.com/item_12642_Metra-70-2104.html?id=12642&afg%5Byear%5D=2007&afg%5Bmake%5 D=Chevrolet&afg%5Bmodel%5D=HHR&afg%5Bbody%5D=Wagon &afg%5Btrim%5D=&afg%5Baudio%5D=&afg%5Bproduct_mode l%5D=

For an investment of $11.00 give it the old college try!
For $39.00 this will get your chimes working

https://www.sonicelectronix.com/item...RC-LAN-03.html