You should never have to replace the wiring harness, and if you do get a professional to do it. Now if you are talking about the wiring harness for a after market head unit, then you just buy an adapter. AND ALWAYS DISCONNECT THE NEGATIVE BATTERY CABLE WHEN MESSING WITH YOUR CARS ELECTRICAL SYSTEM.
When making changes to a car it is important to have a diagram of the area. The wiring harness diagram to a Pontiac Grand Am can be found in its maintenance manual.
Begin by removing the wiring harness from your 2000 Pontiac Grand Prix transmission pressure solenoid. Remove the solenoid retaining screws. Reverse the process to install your new transmission pressure solenoid.
Pontiac 2400yes but wiring harness may need to be changed.
MAYBE WAL-MART IF NOT A STEREO INSTALL SHOP
It depends on the engine. If it is a 3.3 v6, you will locate it under the 3 ignition coils. Unbolt each coil, 2 screws per coil, and the unit will be free, other than the primary wiring harness. The primary wiring harness is connected by a bolt, through the connector and into the module.
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Wiring runs all over the vehicle.
The 1994 Pontiac Grand Am ignition lock cylinder is held in place by the retaining ring at the top of the cylinder. Remove the retaining ring. Remove the wiring harness from the back of the cylinder.
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