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: car shut off while driving and now will not crank

Based on your description this might be some sort of major electrical failure. Inasmuch as the car is not starting at all now, you can request a no start diagnostic and the responding certified mechanic will simply determine what has...

Q: What is a cost estimate for the following; Your inside door handle plastic door rod clip broke and you will need to have the door

The rod clip can be replaced for an hours labor and parts. I do not have price for clip but should be less than $5. The hour of labor will be determined for your location. you can contact customer service...

Q: I have a 2007 GMC Acadia and I'm experiencing a hesitation when I accelerate from a stop.

Hi there. The hesitation would be a communication error with the transmission. Also, if the transmission is low on fluid there could be a hesitation when accelerating. Check the transmission fluid level and make sure that it is full. Check...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...