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02 Avalanche amp wiring pinouts.

carman67

New Member
Joined
May 1, 2013
Messages
2
Working on an 02 Avalanche. An aftermarket stereo was installed in the vehicle. She doesn't like it anymore and wants me to put a factory unit back in so went to pick n pull and bought one. Unit works fine, I plugged it into my 97 yukon. The in dash wiring on the Avalanche is intact, whoever installed the unit however cut most of the wires going to the amp behind the glove box. I went to the dealership who printed me out 75 pages of connectors and wiring on the various radios that came in the vehicle. I found the one that matches c-1 and c-2 in the dash for the radio but the ones for the amp are all wrong. Looking at the ones they gave me some of the speaker inputs and power inputs are swapped so if I hook it up wrong I could potentially fry something. I will type in the connector pin positions and wire colors in the hopes somebody has a diagram for this vehicle. Some help would be greatly appreciated as I have spent hours searching and found nothing coming close to this wire-up, including the dealership.

a1-brn
a2-brn
a3-tan
a4-dk grn
a5-empty
a6-empty
a7-empty
a8-empty
a9-brn
a10-yel
a11-tan
a12-gry

b1-dk blue
b2-blk
b3-lt grn
b4-lt grn
b5-empty
b6-empty
b7-ppl
b8-pnk
b9-dk blue
b10-lt blue
b11-lt grn
b12-dk grn
 
Is it possible that you're reading the pins backwards? Your color codes match up with my schematics/drawings if you just reverse the order of pins: A1=A12, A2=A11, etc. See the attached AmplifierC2.gif for a view of the connector. The end view is oriented as if you were looking at the mating end of the connector with the wires extending away from you.

You probably have them all from the dealer, but I'm attaching a few more drawings that relate to the amplifier.

BUT, the real question is: are you sure you want to hook up the amp? I still use my '02 stock factory radio, but I bypassed the amplifier. It sounds much better that way. The factory amplifier doesn't really amplify -- it's more of a crossover for sending the low frequencies to the subwoofer (which doesn't exist on the Av) and for sending the high frequencies to the D-pillar speakers (which don't exist on the Av.) With those key speakers missing, it seems that the only thing the factory amplifier manages to do is make the sound dull and muddy.

Before you go to a lot of work to rebuild those connectors, you might want to just temporarily connect the wires together so that each wire going to an amp input goes directly to the corresponding amp output. For example: BRN B11 to YEL B3 (left rear -) and BRN B12 to BRN B4 (left rear +) and so on.

Don't let the "low level audio signal" names on the radio outputs and amplifier inputs fool you. These are NOT pre-amp (low level) outputs, they are full-fledged speaker outputs from the radio. If you're concerned about the volume level, the radio can drive more power to the speakers directly, than it can through the so-called amplifier -- putting the amplifier into the circuit actually gives you less volume!

-- SS
 

Attachments

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  • AmplifierC2.gif
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  • AmplifierSchematic.gif
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  • RadioSchematic.gif
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Thank you for this info. I am going to check this out against what I am looking at. Feel real stupid if I was looking at the plug backwards, lol. Also, I have seen several posts of people bypassing that factory "amp" and wondered why. Thank you for the explanation on that. I'll show it to her so she understands and likely bypass it. Now just have to figure out the wires as several of them are like colored and some numbskull cut them all off and labeled none of them. (sigh).
 
Got my Mentra 2021, yes 2021. For the Impala, took a few minutes to pull the plugs to reposition. Plugged it in worked great... Bought it online from caraudio for $10.. Was so easy..
 
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