Engine will not crank over?

Lets see if the starter is getting a trigger signal this guide will show you how.

https://www.2carpros.com/articles/starter-not-working-repair

and this guide will help you reset the alarm in case that is the problem as well.

https://www.2carpros.com/articles/how-to-reset-a-security-system

Please run down these guides and report back.

Are you saying it cranks good but won't start or it won't even crank? If it cranks good but won't start, have a helper crank it while visually check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. Can't rule your security system, at the moment, is the lite on or flashing?

Have the battery tested and the charging system. If you have a digital multimeter, we can help you do some testing.

No crank at all/nothing/nada:

Could be the starter, starter relay, park and neutral switch and ignition switch assuming the battery and connections are good.

Hello,

It sounds like the immobilizer is engaged. Does the security light flash when you try to crank it over? Here are the wiring diagrams for the starter motor and security system so we can see how it works. There is a starter relay that needs to be checked. Here is a guide to help us get started:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken

Welcome to 2CarPros.

First, understand that it could be a weak battery even though the other things are working. I am going to provide a few basic tests to determine if it is a connection issue, weak battery, or the starter. I suspect it may be the starter, but lets be sure.

First, confirm the battery terminals are clean and tight.

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

Next, load test the battery following this link:

https://www.2carpros.com/articles/car-battery-load-test

If the battery terminals are clean and tight, the battery checks good, then I suspect it is the starter. Follow this test:

https://www.2carpros.com/articles/starter-not-working-repair

Here are a few links you may find helpful when testing the starter and wiring:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

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Please understand that since you hear only a click from the starter, any of the three things I mentioned could be the issue. If you determine the starter is bad, here is a link that explains in general how one is replaced:

https://www.2carpros.com/articles/how-to-replace-a-starter-motor

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Here are directions specific to your vehicle for replacement:

2005 Pontiac Grand AM V6-3.4L VIN E
Procedures

STARTER MOTOR REPLACEMENT

REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
2. Raise vehicle. Refer to Vehicle Lifting.
3. Remove the flywheel inspection cover bolts.
4. Remove the flywheel inspection cover.

pic 1

5. Remove the electrical connections from the starter motor.

pic 2

6. Remove the starter motor mounting bolts.
7. Remove the starter motor.

INSTALLATION PROCEDURE

pic 3

1. Install the starter motor to the engine.

NOTE:
- Before installing the starter motor to the engine, tighten the nut next to the cap on the solenoid BAT terminal. If this terminal is not tight in the solenoid cap, the cap may be damaged during installation of electrical connections and cause the starter motor to fail later.
- Refer to Fastener Notice in Service Precautions.

2. Install the starter motor mounting bolts.

Tighten the bolts to 40 Nm (30 lb ft).

pic 4

3. Install the electrical connection to the battery terminal on the solenoid.

Tighten the battery terminal nut to 17 Nm (13 lb ft).

4. Install the electrical connections to the S terminal on the solenoid.

Tighten solenoid S terminal nut to 3 Nm (27 lb in).

5. Install the flywheel inspection cover.
6. Install the flywheel inspection cover bolts.

Tighten the flywheel inspection cover bolts to 10 Nm (89 lb in).

7. Lower vehicle.
8. Connect the negative battery cable.

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Let me know if this helps or if you have other questions.

Take care,
Joe

Check for loose wires like starter cable, engine ground, body ground etx.

Also try resetting anti theft on this. See pic

If the starter is good, you need to check to see if there is power to it in the start position. If there isn't, you need to work back to the starter relay, ignition switch. NOTE: Always make sure the battery is fully charged and all connections are clean and tight.

Try resetting anti theft like it shows in pic, GM changed anti theft around the age of your vehicle but this may not be correct. Ifyou have a manual check in that as well fro resetting security system. A lot of times with no starts this is the problem. If it still doesn't stat have a pro scan it as it still may be a security issue but he will need to find problem with it.