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GMC

Sounds like the shifter solenoid is stuck in a position and will not disengage. Try removing the harness to the shifter solenoid on the transfer case and see if the noise goes away. If it does, then the shifter solenoid...

If the humming noise occurs when the car is stationary with the engine on at any RPM, then it is engine or transmission related but the noise could originate from an accessory drive on the engine. However, if the noise...

The check engine light comes on and stays on if the onboard computer sees a problem that could cause an increase in emissions or a problem with its systems. After looking at most of the possible codes or issues that...

Are and of the gauges not acting like they normally do? On your vehicle a common failure is of the oil pressure sending unit. When this happens your gauge will display zero oil pressure and cause the check gauges light...

Hi, in this case, the PCV should be checked, it may be a little dirty. The elbow on the vacuum line at the throttle body may need to be replaced. Inspect for cracked vacuum line from the throttle body to...

Hi there. I think the information the dealership is telling you is a bit misleading. An automatic transmission works by maintaining hydraulic pressure created inside the case, and allowing the transmission to smoothly shift gears. If there is debris inside...

Hi There, Dextron VI is what replaced Dextron II and III. I would strongly suggest trying to locate or have Dextron VI shipped to you if it is not available locally as this is the correct and recommended transmission fluid...

Hi there. The reduced engine power message could mean that something went wrong with the engine or transmission. There are multiple sensors and systems in the vehicle to cause this message to appear. Hook up a scanner to the computer...

Hi there, thanks for writing in. Sounds like you may need to check the shift linkage. It most likely came off at the transmission shift control arm. The plastic bushing for the shift cable falls apart over time, and then...

If the smoke is white, you're burning coolant, if the smoke is blue, you're burning oil, if the smoke is black, you're running rich (too much gas). A qualified technician, like one from YourMechanic, can help you identify the problem...

Fuel pumps rely on fuel for cooling and lubrication so be sure the tank is always kept at least one-quarter full of fuel. If there is a voltage drop on the supply circuit to the pump, that will cause high...

The transmission in your truck has the updated 4L60 series with a heavier duty forward gears and thrust bearings so your transmission problem is most likely the torque converter or front pump failure. The clutch materials in an automatic transmission...

Try turning the wheel back and forth while turning the key, use caution not to break the key. If you still cannot get the key to turn, you may have to have the ignition lock cylinder replaced. A certified technician,...

Cranking and turning over are both referring to the starter cranking or turning over the engine. If the key is turned inside the ignition and no sound is heard while attempting to start, the starter may be faulty. If a...

It is quite possible that the fuel filter is what is causing your no start issue. If the fuel filter becomes clogged with debris, the fuel pressure at the fuel rail will decrease due to the restriction. If the fuel...

Hello. If you have transmission fluid coming from the front of your vehicle, then you either have a ruptured cooler line or the radiator has cracked where the cooler lines go. I would start by getting under the vehicle to...

It sounds like there is a serious problem in the traction control system. Fault codes need to read out to see what the Electronic Brake Control Module (EBCM) sees. For the traction control system to work properly, it needs to...

Hello. If the vehicle has aftermarket wheels on it then they may have the wrong offset which will cause this. If the wheels are original then the rear suspension needs to be checked for worn parts. If the suspension is...

You do have front struts and rear shocks on your GMC Terrain. If you are having any problems with your suspension, or need replacement struts (https://www.yourmechanic.com/services/strut-assembly-replacement), a certified mechanic from YourMechanic can come to your home or office to service...

The fuel injectors (https://www.yourmechanic.com/services/fuel-injector-replacement) on this engine can commonly get carbon buildup on the tips. This will cause the engine to run rough and have hard starts. You should try running top tier fuels in our car that have cleaning...