When i put the truck in 4×4 it makes a creaking noise and when i start to make a turn the truck wont turn all the way

ANSWER : Hey there. It is possible that it may be time to change the differential fluid, as this symptom is common when the differential fluid is dirty or low. This service is typically due every 100,000 miles. It is also possible that an internal component inside the 4WD housing has been damaged. This type of noise is also common with power steering issues or damage to tie rods and ball joints. Due to the multiple possible problems that could be causing these issues, it’s best to have a professional mechanic complete a car is making a noise inspection.

ANSWER : It is very likely that you have a powertrain control module failure. This can happen often on many GM vehicles. I would recommend having the powertrain control module tested and replaced as necessary in order to resolve this issue. After the powertrain control module is replaced, a reflash procedure will be required so that the vehicle can relearn all of its primary engine data. Once the reflash is completed, your vehicle should no longer have this issue.

ANSWER : Hello. Thank you for writing in. There are several reasons your vehicle may only start when jump starting. The first and most common is a build up of resistance that is causing you to need a boost of voltage to get the engine started. This may be due to poor battery cables, a bad ground connection, a poor starter solenoid, and a couple of other issues. The first thing you want to do is perform a visual inspection of the starting system. Make sure there is no corrosion build up in the battery cables. You can also check the resistance across these wires and make sure you have a solid connection between components. You then want to make sure the starter solenoid is doing its job. It is responsible for taking the small amount of electricity sent by the ignition and turning it into a huge electrical charge that is strong enough to push over the engine with the help of some gear ratios in its favor. Do some more testing, and stick to the basics before assuming its something seriously complicated.

ANSWER : A possibility is a faulty ignition switch. If the switch opens after the car starts, the engine will shut off. But, that is just a possibility and a diagnostic would have to be performed to rule that in or out. Be sure you have a fully charged battery that passes a load test. Starters motors can display intermittent operation if they are faulty. With a fully charged battery, if the starter motor does not run that signifies an electrical problem in the starter circuit (includes the ignition switch) or a problem with the starter motor itself. If there is power to the starter motor and yet it doesn’t run, the starter is condemned and replaced. Alternatively, if there is no power to the starter, or there is a big voltage drop anywhere on the circuit to the starter, then the circuit has to be traced until the fault in the circuit is found. Notably, faults can include high resistances, due to corrosion, wire strand breaks, or loose terminals, which can only be diagnosed using a voltage drop test. Regardless of what the underlying cause of the no start condition is, if you desire that a certified mechanic resolve this promptly, please simply request a no start diagnostic and the responding mechanic will get it diagnosed and repaired for you. Please let us know if you have further concerns or questions as we are always here to help you.

ANSWER : Hello. If the noise is still there when the engine is off and if you are not turning the wheel, then it is typically either a failing bearing in the rear differential or it can be a failure in the transfer case if it is four wheel drive.

The transfer case is a very common failure on this vehicle. If it is two wheel drive then I typically start by draining the oil from the rear differential and inspecting the fluid for metal.

Any metal in the fluid indicates a bearing failure. If that is also fine, then it may be an issue within the transmission. It may be a failure in one of the thrust bearings. If you need to get this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your car’s grinding noise.

ANSWER : Hey there. You have a bad battery or there is a bad connection in the starting system. The battery should be load tested and the state of charge should be checked with a hydrometer. Your starter requires about ten times more power from the battery than any other system in your car. Even if the headlights and all other electrical components work, it is not a good indicator of the condition of the battery. So a thorough testing of the battery should be performed first.

If the battery checks out, then the problem is a bad connection in the starting circuit. The first test I do, which may be irrelevant since you have already replaced the starter, is to tap on the starter with a hammer while someone is attempting to start it. If it cranks the motor, it needs a starter. It is possible a new starter is bad, so there is still some value in performing this test.

If this doesn’t reveal a bad starter, another simple and test is to attempt to crank the car for up to thirty seconds. Pay attention to smoke or any electrical burning smells that might occur. If you experience one of these, immediately stop and look under the hood for a hot spot in the battery cable connections. Feel both battery posts, the positive and negative battery cables, the ground connection at the frame and the main power connection at the starter. If any of these are hot or warm, it is a bad connection.

If that doesn’t reveal anything, the next step is to use a test light to see if the starter solenoid is getting power from the ignition switch. If it is not, you will need to use a test light to find our where the connection is lost. The suspect parts are the ignition switch and the neutral safety switch (aka the transmission range switch). You will need access to a wiring diagram and a test light for this portion of the testing.

If you should require further assistance, I recommend having a professional technician, like one from YourMechanic, diagnose your starting issue so that this can be repaired.

ANSWER : It sounds like you may be dealing with a few issues. I would start by asking if there is a check engine light on? If there is, then getting the engine control module scanned for faults would be the first step to diagnosing the low power issue. As far as the noise over bumps and when turning, there could be a damaged CV joint or axle shaft, or there could be a loose suspension or steering component. Weak motor mounts could cause a weird noise and shake when going into reverse with your foot on the brake, so it’s possible those have failed as well. I would suggest having a qualified mechanic, such as one from YourMechanic, diagnose the noise over bumps and the noise when put in reverse.

ANSWER : Hello, thank you for writing in. The vehicle is likely having issues with the battery. When the alternator fails, the vehicle does its best to rely on the battery, which puts it under an incredible amount of stress. This likely burned out the battery. Another confirming factor is that the vehicle relies solely on the battery to start, and is the main reason for symptoms like yours. You may be able to run the vehicle if jumped, but the vehicle may run poorly if at all. For more help changing the battery, contact our service department to schedule an appointment.