20 Most Recent 2009 GMC Acadia Questions & Answers

You need to identify what each code means and again you could have other codes popping up because a sensor could be depending on another faulty sensor

2009 GMC Acadia | Answered on Nov 19, 2019

under the seat

2009 GMC Acadia | Answered on Sep 29, 2019

I have similar issue with Smart Forfour. Its the electrics - there is a faulty connection between lock and brain. We removed the interior panels and applied a voltage independently to release the lock.
Replacing the mechanism did not solve the issue, as its a wiring harness problem. Now have a "string" attached to the lock mechanism which we use to open the hatch from inside.

2009 GMC Acadia | Answered on Jun 28, 2019

You will have 2. One of them is on the accelerator pedal, and the other is on the throttle body on the engine.

2009 GMC Acadia | Answered on Feb 28, 2019


2009 GMC Acadia | Answered on Feb 08, 2019

Sounds like the magnetic clutch on the compressor may be defective or have an excessive air gap between the drive and driven plates (gap increases with engine temp)..

2009 GMC Acadia | Answered on Aug 10, 2018

It means there is a fault with your anti-lock braking system. You need to get it to a dealer who will read the fault using a code reader and fix the problem for you.

2009 GMC Acadia | Answered on Dec 22, 2017

U073 is a communication code from one module to another to simply put it. Code U073 refers to a communication problem with the electronic brake control module ( Which controls ABS/Traction and stability ). I would suspect a loose connection/shorted wiring or even possible internal problem with the brake control module.If the issue occurs after hitting a bump, most likely a loose connection or the wiring rubbing somewhere causing a short from the brake control module.

2009 GMC Acadia | Answered on Dec 22, 2017

Driver Shift Control (DSC) or Electronic Range Selection (ERS): This position (M-Manual / L-Low) allows the driver to utilize the DSC/ERS system. When the shift selector lever is moved to this position, the driver may select upshifts or downshifts by using the paddle switches located on the steering wheel/shifter. An upshift is requested by pushing either + button. Refer to the vehicle owner's manual for more specific DSC/ERS information.
Driver Shift Control (DSC)/Electronic Range Selection (ERS)
Refer to the owner's manual for specific instructions on DSC. The TCM will override shift commands when maximum engine speed is achieved and will protect from any downshift which may cause excessive engine RPMs.

Electronic Range Select (ERS) Mode
ERS mode allows you to choose the top-gear limit of the transmission and the vehicle's speed while driving down hill or towing a trailer. The vehicle has an electronic shift position indicator within the instrument panel cluster. When using the ERS Mode a number will display next to the L, indicating the current gear that has been selected.
To use this feature:
Move the shift lever to L (Low).
Press the plus/minus button located on the shift lever, to increase or decrease the gear range available.
When you shift from D (Drive) to L (Low), the transmission will shift to a pre-determined lower gear range. The highest gear available for this pre-determined range is displayed next to the L in the DIC. See Driver Information Center (DIC) and DIC Operation and Displays for more information. The number displayed in the DIC is the highest gear that the transmission will be allowed to operate in. This means that all gears below that number are available. For example, when 4 (Fourth) is shown next to the L, 1 (First) through 4 (Fourth) gears are automatically shifted by the vehicle. the transmission will not shift into 5 (Fifth) until the + (Plus) button is used or you shift back into D (Drive).
While in L (Low), the transmission will prevent shifting to a lower gear range if the engine speed is too high. You have a brief period of time to slow the vehicle. If vehicle speed is not reduced within the time allowed, the lower gear range shift will not be completed. You must further slow the vehicle, then press the - (Minus) button to the desired lower gear range.
Automatic Engine Grade braking is not available when the ERS is active. It is available in D (Drive) for both normal and Tow/Haul mode. While using the ERS, cruise control and the tow/haul mode can be used. See Tow/Haul Mode for more information.
© 2017 General Motors Corporation. All rights reserved

2009 GMC Acadia | Answered on Oct 09, 2017

It's part of the oil pressure sender.

2009 GMC Acadia | Answered on Dec 12, 2016

No it is not low on refrigerant, if that was the case you would not have any cold air front or rear.. There are many reasons for this condition, the system can be tested electronically and then you diagnose the fault shown with a scanner. You need the dealer on this issue.

2009 GMC Acadia | Answered on Aug 31, 2016

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