Q: I have a 2014 GMC Denali. Every time the rpms are at 1000, coming to a stop or coming out of a stop, something vibrates.

asked by on

My GMC Acadia has been making a vibrating noise when coming to a stop or especially when coming out of one right at 1000 RPMs. I only hear/feel the vibration at 1000 and slightly at 2000RPMs. Also when braking the RPMs are fluctuating up and down and seem like they are getting stuck in a gear just a bit. Any ideas on the noise and fluctuating RPMs? Note, this is not a brake or wheel vibration. It appears to be coming from the engine.

My car has 42000 miles.
My car has an automatic transmission.

If the noise only exists when the vehicle is moving at the RPM values you cite, the vibration is probably in the drive train. If the vibration occurs in park though, again at the cited RPM values, then it is due to a rotating engine/transmission component such as the harmonic balancer or torque converter. There’s also a possibility there could be a motor mount defect. The RPM fluctuation on braking could be due to a transmission issue such as faulty valve body/shift solenoid controls. However, engine controls, such as the throttle position sensor, idle air control valve and so forth would be evaluated, too. To resolve an issue like this, you can request a vehicle vibration diagnostic and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I have a 2014 GMC Denali. Every time the rpms are at 1000, coming to a stop or coming out of a stop, something vibrates.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Clicking noise inside my gear shift on my 2013 Dodge Charger V6

Hello, thank you for writing in. There is a solenoid near the shifter that is called the interlock solenoid. It relates to the brake switch, and is part of what allows you to move out of park when you push...

Q: My check engine light, battery light, and oil light all came on in my 2014 Elantra and then my car would no longer accelerate

Hi Naomi. Thanks for contacting us tonight. There could be multiple issues going on with your Hyundai or something very simple that needs to be replaced or repaired. The acceleration problem and check engine light are likely related - but...

Q: The car cranks, starts up and shuts off right away

Hi there. This is almost always caused by a failing ignition switch. When it starts to fail and lose internal contact, this can cause these symptoms to occur. I always do a voltage drop test on the switch to see...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.