Why did you install a new ignition switch ? Lock cylinder part or electrical ?
You have no idea of the complexity of the electronic's on this vehicle ,your best bet take it to a qualified repair shop.
The body control module (BCM) uses the discrete ignition switch inputs ignition 1, ignition 3 and crank to distinguish the correct power mode. Once the BCM has determined the power mode selected by the vehicle operator it will energize the Ignition relay, Run relay and retained accessory power (RAP) relay, depending on which power mode is selected.
Power to many of this vehicle's circuits are controlled by the module that is designated the power mode master (PMM). This vehicle PMM is the body control module (BCM). The PMM controls which power mode (Run, Accessory, Crank, Retained Accessory Power, or Off) is active.
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle, the PMM is the body control module (BCM). The PMM receives 3 discrete ignition switch signals to differentiate which power mode will be sent over the Serial Data circuits.
SOURCE: 1997 grand prix gtp starter location
at rear bottom of engine, u must change it from the bottom. Make sure the battery is disconnected before u start work.
SOURCE: 1996 Pontiac Grand AM V6 Anti-Theft Activated
this is easy fix i had same thing happen when you start your car and it dies don't touch your key for no less than 11 min then turn it to off for no less than 30 sec the book says you might have to repeat this 4 times it worked the first time for me
SOURCE: 1998 Grand Prix GTP windshield washer (full) not pumping fluid
Not difficult to remove inner fender liner (screws around wheel well opening and sometimes a few more)
Pump is available from most auto supply stores and easily installed in tank. Check power at the motor before removing it to make sure the motor is bad and the problem isn't somewhere else.(if no power there problem can be solved as easily as using a push button to get it powered up and as complicated as replacing the multi-function switch...pretty much your choice)
SOURCE: I need to buy oil for my 2005 Pontiac Grand Prix GTP
Check you owners manual.
But should be a 5-30 weight.
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The BCM
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The PCM, see important above
Important: This procedure is not available on vehicles equipped with option code (Z49).
If replacing a BCM with an GM SPO Replacement Part, perform the procedure to setup a new BCM prior to the 30-minute relearn procedure.
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