Working on the Mutt project, swapped the 05 GXP dash harness to the 04 SLE dash, went to hook it all up and realized that the GXP dash harness has some wires extra and some missing compared to the SLE harness. Any chance someone could post up the pinout information for both main dash plugs for both cars? I really want the HUD to work, I would hate to have come this far to have to turn around and just run the SLE harness with no HUD :(

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Ryan

2003 Bonneville SSEi - The Black Mirror SOLD!
2002 Bonneville SE - The Mutt Complete 2004 SLE interior, drivetrain, and body harness swap, ECC swap, HUD swap, black GXP wheels, GXP headlights and tinted tails - SOLD
2003 BMW 540i M Sport, 2001 BMW X5 4.4i, 2010 GMC Acadia, 2017 Grand Design Imagine 3150BH
1982 Cutlass Supreme - The fun one

Are you referring to the harness connector C200 that has 40 cavities and is located next to the steering column connector. The 2004 shop manual shows what wires are used in this harness but the presence or absence of certain wires depends on what options the car is equipped with. If this is the diagram you need, let me know and I'll post a scan.

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bobgto65

2004 Bonneville GXP 62,000 miles purchased 04/13
2009 G8 GXP PBM, M6 9580 miles, no mods, sold 08/15
2009 G8 GT SBM 36,000 miles, modded 430 whp
2002 Bonneville SSEi 203,200 miles (sold 3/2014)

Yea I need that one as well as the one on the top passenger side of the dash.

As for options, the 05 GXP was loaded with everything except the CD changer, as far as I know it has all other options. The 04 SLE has dual zone climate control, steering wheel controls, no moonroof, no XM, no CD changer, not sure what all options were available on the SLE...

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Ryan

2003 Bonneville SSEi - The Black Mirror SOLD!
2002 Bonneville SE - The Mutt Complete 2004 SLE interior, drivetrain, and body harness swap, ECC swap, HUD swap, black GXP wheels, GXP headlights and tinted tails - SOLD
2003 BMW 540i M Sport, 2001 BMW X5 4.4i, 2010 GMC Acadia, 2017 Grand Design Imagine 3150BH
1982 Cutlass Supreme - The fun one

I know you could get XM on the SLEs. Mine has it.

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-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles

Here are the scans, if you need any other connectors, let me know

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bobgto65

2004 Bonneville GXP 62,000 miles purchased 04/13
2009 G8 GXP PBM, M6 9580 miles, no mods, sold 08/15
2009 G8 GT SBM 36,000 miles, modded 430 whp
2002 Bonneville SSEi 203,200 miles (sold 3/2014)

Excellent, thank you! This should at least get me started in the right direction

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Ryan

2003 Bonneville SSEi - The Black Mirror SOLD!
2002 Bonneville SE - The Mutt Complete 2004 SLE interior, drivetrain, and body harness swap, ECC swap, HUD swap, black GXP wheels, GXP headlights and tinted tails - SOLD
2003 BMW 540i M Sport, 2001 BMW X5 4.4i, 2010 GMC Acadia, 2017 Grand Design Imagine 3150BH
1982 Cutlass Supreme - The fun one

After some quick looking around it looks like the biggest difference between the two harnesses I have is in the stereo. The only parts that relates to the heads up display (RPO UV6) are both on connector C200, A8 - pink wire - 14 volt reference and D4 - bare - ground, both of which are not used without heads up display. I will get my meter on it tomorrow but my initial findings / suspicions / thoughts are that the both go to the stereo, I see a bare wire and a pink wire there in the GXP harness but not in the SLE harness.

Can these circuits be traced out to find out exactly where they go in the body harness? A8 circuit 608 and D4 circuit 514 on connector C200? If not it will be time to break out the meter I guess

_________________
Ryan

2003 Bonneville SSEi - The Black Mirror SOLD!
2002 Bonneville SE - The Mutt Complete 2004 SLE interior, drivetrain, and body harness swap, ECC swap, HUD swap, black GXP wheels, GXP headlights and tinted tails - SOLD
2003 BMW 540i M Sport, 2001 BMW X5 4.4i, 2010 GMC Acadia, 2017 Grand Design Imagine 3150BH
1982 Cutlass Supreme - The fun one

Testing confirms that those two additional wires do go to the stereo head unit. Also, three of the four speaker outs are different color wires in the dash harness but go to and from the same spots in the connectors C200 and the head unit connector. The right front speaker however is different, with the Monsoon system (and likely the Bose as well) the low output goes to C200, which is under the steering column, without the amplified system, the speaker output for the right front goes to connector C201 which is on the top passenger side of the dash. I am not installing the amplified system so I have to get output to C201 for the right front speaker to connect to the SLE body harness, I will likely remove the wires from the SLE dash harness and install them in the GXP dash harness.

_________________
Ryan

2003 Bonneville SSEi - The Black Mirror SOLD!
2002 Bonneville SE - The Mutt Complete 2004 SLE interior, drivetrain, and body harness swap, ECC swap, HUD swap, black GXP wheels, GXP headlights and tinted tails - SOLD
2003 BMW 540i M Sport, 2001 BMW X5 4.4i, 2010 GMC Acadia, 2017 Grand Design Imagine 3150BH
1982 Cutlass Supreme - The fun one