When do you Know Your GMC Sierra ignition switch is bad?

If your GMC Sierra is starting right up, but then immediately dies, that is a very good indication that the ignition switch is bad. Here’s what happens. You aren’t getting power to the ignition or fuel pump while the key “rests” in the run position.

Is there a 2007 Sierra that won’t start?

I have a 2007 Sierra that won’t start. When I turn the key on all the lights on the dash come on and the radio works. 2007 Sierra: that wont start..dash come..radio works..start position… I have a 2007 Sierra… I have a 2007 Sierra that won’t start. When I turn the key on all the lights on the dash come on and the radio works.

What happens when you turn the key on a Sierra?

With the key in the run position all the dashlight indicators work, the radio, fan motor, parking lights all work. The power windows, door locks, dome lights, headlights don’t work. I also get a message on the dash that the air bag needs service , the tire pressure system is blank and the fuel mileage is blank. where is it located? No click.

Can a bad ignition switch cause a car to not start?

The first is when the starter cranks, but the bad ignition switch doesn’t turn on the fuel pump or ignition. The engine will just turn over with no spark. The second way is when the starter doesn’t turn at all. This can be frustrating, because a starter that doesn’t turn over at all is usually caused by a bad battery or a bad starter .

Why does my car not start when I turn the key?

This problem may be attributed to a circuit that has failed, so no matter how many times you turn the key, the vehicle will not start. If the circuit has not yet completely failed, you may hear a clicking noise as you try to turn the key.

Why does the ignition key stay in the ” start ” position?

Automatic column shift with cruise. When I start the truck, the key will stay in the “start” position. I have to manually turn it back to “run” so my starter won’t keep running. Also, when I turn the truck off, I now have power to accessories (radio, wipers, lights), just like I have the key turned to accessory.

Where does the ignition key go on a Silverado?

I have a 2000 Silverado 1500 LS 4×4 with a 5.3. Automatic column shift with cruise. When I start the truck, the key will stay in the “start” position.

Can a GM ignition control module be used?

The ignition control module (ICM) and ignition coil tests in this article assume that your vehicle is Cranking but NOT STARTING due to a NO SPARK Condition. If you’re GM car or truck starts and runs, this article will not help you.

How does the ignition switch work on a GM car?

The ignition switch now talks to the body control module (BCM) and it’s the BCM that initiates one of two relays. The second relay, the more important of the two, is controlled by the powertrain control module (PCM). And it only operates the starter relay after it’s satisfied that the correct key is in the ignition.

Can a bad ignition switch cause a Sierra not to start?

A bad ignition switch can cause your Sierra not to start at all. And, it can keep your Sierra from starting in a couple of different ways. The first is when the starter cranks, but the bad ignition switch doesn’t turn on the fuel pump or ignition. The engine will just turn over with no spark. The second way is when the starter doesn’t turn at all.

How does the ignition work on a GMC Sierra?

Ignition- This position activates your ignition system and the fuel pump. At this point fuel is pressurized at the fuel rails, and the engine is ready to fire the plugs when it turns over. Starter- This position cranks the starter. Your ignition “rests” in the ignition position when your Sierra is running.

What are the symptoms of a bad ignition switch?

We’ve compiled some of the most common symptoms of a bad ignition switch . These include stalling issues, not starting, and no power to the radio or accessories. The Sierra’s ignition switch is not what your key goes into.

What to do if your GMC has an electrical problem?

The full rebuild replaces all steppers with new gen motors, lamps, and the troubleshooting fixes bad solder joints, and can fix power supply problems originating in the cluster. Old ones like mine can also benefit from a re-flash with new software which GM provides.

How to fix many GM Truck / SUV electrical problems?

This fix addresses several electrical issues with Silverado / Sierra, Tahoe / Yukon, Denali / Escalade Trucks and SUV’s. This fixed ABS light, Brake light, Service Brake System Message, Traction Active Message, Traction Control Off light, Chimes constantly dinging and the speedometer jumping. Loading…

Why does my GMC Silverado have no crank?

This is a fix for a known electrical issue with the 2003-2007 C/K series GM Trucks where a bad ground causes multiple issues. Such as no start, no crank, intermittent no gauges, and sometimes the theft light would stay on, and the parking lights would stay on.

What are the symptoms of an ECM failure?

Nowadays, those functions are controlled by three computers: Transmission control module (TCM). Today, we’re going to take a look at the most common signs of ECM failure. These ECM failure symptoms can be your first warning of serious engine trouble, so it’s important not to take them lightly.

What are the symptoms of a bad door lock relay?

Usually a bad or failing door lock relay will produce a few symptoms that can alert the driver of a potential problem that should be serviced. One of the first symptoms of a possible problem with the door lock relay are door locks that function intermittently.

Is the 1997 GM ignition switch a defective part?

The 1997 GM ignition switch is an expensive part. So if your diagnostic test results indicate you’ve got a defective one on your hands, check out the following links. I think they’ll help you comparison shop for it and save a few bucks: NOTE: Not sure if the above ignition switch fits your particular 1997 Chevy or GMC pick up or SUV? Don’t worry.

Can a faulty ignition switch cause a no start?

Please try again later. GM Ignition switch replacement to fix a no start or intermittent start. Faulty ignition switch contacts can also cause the PassLock system to enable Click here to see step by step proceedures. http://www.thejunkmanadv.com/the-junk… Support the site, buy service manuals here : http://www.tkqlhce.com/click-7357719-…

What are the symptoms of a defective ignition switch?

The most common symptom of a defective ignition switch is an ‘engine does not crank’ problem. To be a bit more specific, your turn the key to crank and start the engine but nothing happens. Everything works (headlights, wipers, horn, radio, power windows, etc.) but the starter motor won’t crank the engine.

Is there an easy fix for a GMC ignition switch?

This is one way to fix a very complicated electrical system in the Chevrolet and GMC cars and trucks. Some are easy fixes with loose or bad electrical connections. Others involve the ignition switch itself, and others involve one of the computers that the system communicates with when starting the vehicle.

Where is the ignition switch on a GM tilt steering column?

The ignition switch bolts to the column with a 5/16″ stud-headed screw. Install the screw finger tight at this time, note the slots that allow the ignition switch to be adjusted up or down the column: We’ll adjust the ignition switch later, after the column is fully assembled. Inside the GM Tilt Steering Column Page 16

How does a key turn work on a starter motor?

The key turn completes a small circuit that tells the battery to release power to the starter solenoid. The solenoid ramps up the power given to it and that power causes the starter motor to turn very quickly.

What happens when you turn the key on a car?

The higher rate of electricity gives the starter motor more “oomph” to turn the engine over. The process of starting the car begins at the ignition switch in the driver’s cockpit. The key turn completes a small circuit that tells the battery to release power to the starter solenoid.

Why does the keyswitch not turn the starter?

They keyswitch may not be sending the signal to tell the battery to send juice to the starter, the battery may not be able to send enough power to the solenoid to turn the starter, the solenoid may not be ramping up the power given to it, or the starter may not be functioning and able to turn.

Where is the power switch on a Silverado Sierra?

Open your main fuse panel under the driver’s side hood. You will see a four pin relay holder for your rear window defroster (If you don’t have the defroster option) The inboard terminal will be hot with key on. If you have rear defroster, of course this won’t work because the receptacle is already in use.

Why does my GM car say no start no crank?

How to diagnose a no start no click on GM vehicle. If you have a late model GM vehicle and turn the key only to hear nothing, you’ll most likely think you have a dead battery—and you may. But a no start, no crank, no click condition can be far more involved than that.

Why is my GMC Sierra 1500 not starting?

If a new car battery has been installed, the battery may not have yet reached its full capacity. There is nothing to worry about. A new battery only develops its full capacity over time. The voltage of the battery on your GMC Sierra 1500 can be measured precisely with a multimeter.

When do you Know Your GMC Sierra ignition switch is bad?