Chevrolet (2011-2015) Aveo Head Unit pinout diagram @ pinoutguide.com

at the head unit wiring harness (connector end view)

p/n 95179056

Head Unit with US8

Pin	Colour	Function	Option
4	BK/BN	Low Reference	UE3 or UH7
6	BK/YE	Mobile Telephone Voice Low Reference	UE3
10	GN	Right Auxiliary Audio Signal (2)	UH7
11	BU	Auxiliary Detection Signal	UH7
17	BK	Ground	UH7
18	BU	Mobile Telephone Microphone Signal	UE3 or UH7
20	YE	Mobile Telephone Voice Signal	UE3
23	BN	Auxiliary Audio Common Signal (2)	UH7
24	GY	Left Auxiliary Audio Signal (2)	UH7
28	GN	Low Speed GMLAN Serial Data	-
31	YE/BK	Right Front Speaker Signal (-) (1)	-
32	BN/BU	Left Front Speaker Signal (-) (1)	-
33	BU/BK	Right Rear Speaker Signal (-)	UW6
34	GN/BK	Left Rear Speaker Signal (-)	UW6
38	BK	Ground	--
39	YE	Right Front Speaker (+) (1)	-
40	BU	Left Front Speaker (+) (1)	-
41	WH	Right Rear Speaker (+)	UW6
42	GN	Left Rear Speaker (+)	UW6
44	RD/BU	Battery Positive Voltage	-