http://www.directechs.com/directwire/default.asp
try this for all the "special notes" but here is everything you need. compliments of bestbuy.
12volts <#> red & red/black + ignition harness
Starter <#> yellow + ignition harness
Ignition <#> pink + ignition harness
Power Lock <#> white - lt. gry plug, pin A2 @ BCM <#>
Power Unlock <#> same wire as power lock
Lock Motor <#> gray 5wi driver kick, door harness
Unlock Motor <#> tan 5wi driver kick, door harness
Disarm Defeat <#> tan 5wi pass. kick, door harness
Parking Lights+ <#> brown + lt. gry plug, pin B8 @ BCM <#>
Parking Lights- <#> white - gray plug, pin B1 @ BCM <#>
Hazards same as turn signals
Turn Signal(L) lt. blue/black + steering column
Turn Signal® dk. blue + steering column
Door Trigger <#> lt. green/black & lt. blue - gry and lt. gry plug @ BCM <#>
Dome Supervision <#> white - pink plug, pin A11 @ BCM <#>
Trunk/Hatch Pin <#> orange/black - light in trunk
Hood Pin <#> N/A
Trunk/Hatch Release <#> black - lt. gry plug, pin A7 @ BCM <#>
Power Sliding Door N/A
Factory Alarm Arm <#> N/A
Factory Alarm Disarm <#> N/A
Disarm No Unlock <#> N/A
Tachometer <#> white or purple/white ac PCM <#>
Horn Trigger <#> black - gray plug, pin A4 @ BCM <#>
Memory Seat 1 N/A
Memory Seat 2 N/A
Memory Seat 3 N/A
NOTES
The BCM (Body Control Module) is between the blower motor and the passenger side kick panel.
notes
OLDSMOBILE, ALERO, 2004, Power Lock
Lock is straight negative trigger. Unlock is negative trigger thru a 1.5K (1500) ohm resistor. MUST use relays. MUST close doors to lock with a single pulse.
notes
OLDSMOBILE, ALERO, 2004, Door Trigger
The driver door trigger is lt. green/black in the gray plug, pin B7. The passenger door (and rears on 4 dr) is lt. blue in the lt. gray plug, pin B10. Use both wires and diode isolate each.
notes
OLDSMOBILE, ALERO, 2004, Tachometer
On the 2.2L models use white wire in the black plug, pin 19. On the 3.4L models use purple/white wire in the blue plug, pin 8, or white wire in the blue plug, pin 54.