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V8-4.9L

Most of the time when the fan stops coming on it is caused by a fan failure. If the fan stops working it means that either the motor in the fan failed or it blew a fuse. If it blew...

Hi Tyler. Thanks for sending the question tonight. If you've just replaced a battery (like in the last 24 hours) then I would suggest checking the battery cables for corrosion or check your ignition relay. If the battery was replaced...

Hi there. On most GM V-8's there are four total engine mounts and two transmission mounts. If you'd like to receive a price estimate to have your engine mounts replaced, please click this link (https://www.yourmechanic.com/services/engine-mount-replacement) to be forwarded to the...

Hello. From what you are explaining it sounds like you have a fuel system issue. It sounds like you are getting too much fuel. It can be caused by a leaking fuel injector, but most of the time it is...

The pulleys will not just lose their alignment. For this to happen, there has been a failure somewhere. One of the most common causes I have found for this problem, on a serpentine belt system, is that the belt tensioner...

Hello - If i understand you correctly, you are asking where the 5 solenoids (you refer to them as "actualizations") for this transmission (4T60E) are located. These solenoids are mounted to the transmissions valve body, which is located inside an...

If by "blocks", you mean the wheel turns smoothly then at some point in turning it, the wheel suddenly goes stiff and is hard to turn, it it a common symptom of GM products of that era having a bad...

Hello. The biggest engine that this vehicle originally came equipped with was the 5.7L V-8. This is the 350 cubic inch version. I am not sure what modifications to your vehicle that would need to be done to make this...

Hello. Several owners of the BMW 750i have complained of this issue. The usual fix required is a PCM reflash. The PCM flash will have to be done by BMW but it is the most likely cause and most common...

Your presumption sounds exactly right to me. The only time that coolant enters the passenger compartment is through the heater core. If you have coolant leaking (https://www.yourmechanic.com/services/coolant-is-leaking-inspection) into your interior it is under no uncertainty that your heater core is...

It sounds like you may have a fuel supply problem in getting the proper amount of fuel to the fuel injectors. As you know, when you turn the key to on, the fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement) is activated and the fuel...

Hello - your Deville does not have a fuel cutoff reset button. If you can't hear the fuel pump running with the key in the "On" or "Start" position, check the fuel pump fuses, then check the fuel pump relay...

Hello. If the computer is quickly overheating and shutting off then it may be possible that excessive voltage or current is flowing too, or through it, causing it to overheat. This can be caused by wiring issues or by a...

Hi there. The ignition system for the 4.9L in your vehicle, should be HEI (high energy ignition) and does not have a CKP (crankshaft position sensor). The pick-up coil is inside the distributor and most likely is not the cause...

Your description suggests you may have a bad grounding problem, a short somewhere, or potentially a failing voltage regulator. The voltage regulator regulates the power charged to the battery by the alternator to ensure that the battery is not over...

Hi! I'd take a look to be sure the power steering belt is still there. With the engine running, you should be able to see the p/s pump pulley turning. The reservoir should be filled to the full mark. Listen...

There can be multiple causes, but it sounds like your fuel injection (https://www.yourmechanic.com/services/fuel-injector-replacement) is injecting too much fuel into the engine for the amount of air it's using. Faulty temperature, air flow, or oxygen sensors (https://www.yourmechanic.com/services/oxygen-sensor-replacement), a dirty throttle body...

Based on the information you provided, it sounds like the noise may be coming from the transmission. There are a few technical service bulletins (https://www.yourmechanic.com/article/how-to-use-a-technical-service-bulletin-by-parker-hill) about transmission whining noises. Have a certified professional inspect the noise (https://www.yourmechanic.com/services/car-is-making-a-noise-inspection) in person in...