![]() ![]() If the engine’s ability to fire the spark plug at the right time is called “timing”. It’s likely your Sierra had a rough idle before 3. Many things, including bad spark plugs, bad coil packs, bad plug wires, computer issues, and more, can cause ignition issues. ![]() You’ll probably have a misfire-related code such as P0300, P0301, etc… When there is no spark, the engine will not start. One of the most significant issues that will cause a vehicle to crank but not start are ignition issues. Without the proper amount of fuel entering the combustion chamber, the Sierra will crank but not start. If your Sierra isn’t getting enough fuel, or any fuel at all, it may have a bad fuel filter or a bad fuel pump. When applicable, we’ve listed the common trouble code(s) associated with the cause. The codes will likely be related to the potential issues listed below. Use an OBDII scanner to check and see if the engine has thrown any trouble codes. It is highly likely that if the engine is cranking but not starting that it has thrown an OBDII code. Your truck’s engine needs air, fuel, and a spark to run. Here are the common issues that can cause your Sierra to crank but not start. It really can get that one last start out of it. Or, you can beat the starter with a hammer. Sometimes you’ll get lucky and it’ll “catch”. When a starter goes bad, they will usually not give you much warning at first. When the starter isn’t functioning, it is impossible to start your truck.Ī bad starter can make a clicking noise, no noise, or it can grind. The next thing to look at when your Sierra isn’t starting would be the starter itself. Suspect the alternator if the battery light stays on after charging your truck’s battery or jumping it. If the battery is dead, it either isn’t storing enough voltage or it isn’t charging enough.Ī bad alternator can cause your battery to drain to the point it can’t turn your Sierra over. If the battery is in the vehicle and it’s under 12 volts, it’s likely bad unless your truck has been sitting for a while or something is drawing current. You can take your battery to the local parts store or even Walmart and have it tested to see if it still holds a charge.Īlternatively, you can test the battery yourself with a voltage meter. Your Sierra needs 12+ volts to start its engine. Low Battery VoltageĪs your truck’s battery ages, its cranking amperage decreases, leaving it with a diminished capacity for starting the engine. Here’s a good article from Napa on properly cleaning a battery terminal. If there appears to be green or white on them or the terminals, cleaning them may be what your Sierra needs to get back on the road. If they are loose or corroded, it acts as a barrier that can keep the starter from getting the voltage it needs to crank the engine. Start by taking a look at the battery posts. Battery Cables If you have a battery post that looks like this, it may be keeping your Sierra from starting. Here are the most common reasons why the GMC Sierra won’t start when the engine is not cranking. This article is written with the assumption that you are looking for a way to get your GMC Sierra started now, and is meant to provide you with practical advice to help aid in the diagnosis.įirst, is your Sierra cranking over at all (the engine spins when you turn the key? Or is the starter not engaging (you may hear a clicking sound)? We cover all the likely ones in an order that makes sense when diagnosing the issue at home. Many different issues can cause the problem. Suited for anyone tired of the Mac booting chime, StartNinja for Mac is especially useful for laptop owners who find themselves regularly booting their Mac during meetings or classes.If your GMC Sierra doesn’t start, you’ve found the right article. This app is a donation-ware so you are free to try it and use it as long as you like with an option to donate something. In testing, even though it worked great on our MacBook Pro, StartNinja did not work with an iMac. Once you're done, you can both forget about the app itself and about the annoying C Major chord booting sound. Simply check the current settings, and then modify it to your liking by switching the System Startup Chime on or off. The app is very simple and it only consists of a single preference window. It will effectively silence your Mac during the startup and allow for silent booting.Ī small utility app, StartNinja for Mac installs with a classic drag-and-drop and will reside in your applications folder. If you're tired of the well-known Macintosh startup chime, then you will certainly like to try StartNinja for Mac. If there is a single thing on Mac computers that hasn't been changed through time and countless iterations, it is the existence of a signature "boing" startup chime. ![]()
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