GPS How to in 1999 to 2001 Alero

[Redog]

Don't know about in 2002, but in 2003 and 2004 it should be plug and play.

It's still not working right now. I took it to the dealer and the radio does not commuicate with the GM Scan Tech II tool when in this car. I'm taking the radio to a shop in the area to see if they can clear the VIN from the radio. If they do that, it won't be able to lock anymore.

Anyway, You'll need these connectors:

GM 1994 and up 32 pin "into car" hardness
http://www.parts-express.com/pe/show...TOKEN=45419087

GM 2000-up "Into Radio" hardness (24 pin with 12 pin mirco pak) (check the back of your radio first)
http://www.parts-express.com/pe/show...TOKEN=45419087

Correct fuses to upgrade the system. The Alero's radio uses 10 amp fuses, the radio uses 15 amps

1 Figure out which car your new radio came out of, then go to Crutchfield.com to figure out the wiring of the speakers and power. I found the Crutchfield website easier to figure out the pins

Here is the 1999-2000 Alero wiring from Crutchfield:
http://www.crutchfield.com/App/Suppo...e+Alero+wiring

2 Twist the wires together, tight enough to make a good connection but so that you can still take them apart.

3 For the Data Line (required to turn on the radio) splice into the purple wire on the PCM and run the wire towards the radio. For test purposes only, this wire will get hooked into the "data line" port on the 24 pin hardness. In my case it is Pin 1 (AKA A1)

4 For the VSS (Vechile Speed Sensor) splice into the Green wire with the white stripe in the PCM, not too far from the purple data wire, and run the wire towards the radio. This wire gets connected to pin "E" in the Mirco pack 12 pin connector. You could also hook this wire into the green and white wire at the cruise control module under the hood. Doesn't matter.

5 Plug in two hardnesses and see if the radio works. Turn the car to "ACC" only and the radio should work. I used a CD to test the sound, the anntenna wire was too short and I could hold the radio and test at the same time.

Sometimes the radio will not work fully until programed. Sometimes this means no sound. Don't worry, if you unplug it and wait at least 15 seconds, it may work for you.