Designed to be a more fuel efficient alternative to the traditional full size SUV, the GMC Acadia was introduced for the 2007 model year, and rode on the new FWD Lambda platform. All-wheel drive and a selection of V6 engines were available, making it a viable option for people that wanted fullsize capability and reasonable fuel economy. To that end, first gen versions of this upscale 3 row crossover were fitted with the 6 speed 6T75 transmission. Let’s look at some of the most common GMC Acadia transmission problems.
What Transmission Do I Have?
GMC Acadia Transmission Models
GMC Acadia: 6T75E Transmission
GMC Acadia: 9T65 Transmission (2018-Up)
GMC Acadia Diagnostic Trouble Codes | DTC
| Trouble Code | Description |
|---|---|
| P0711 | Transmission Fluid Temperature Sensor Circuit Range/Performance |
| P0712 | Transmission Fluid Temperature Sensor Circuit Low Input |
| P0713 | Transmission Fluid Temperature Sensor Circuit High Input |
| P0716 | Input/Turbine Speed Sensor Circuit Range/Performance |
| P0717 | Input/Turbine Speed Sensor Circuit No Signal |
| P0722 | Output Speed Sensor Circuit No Signal |
| P0723 | Output Speed Sensor Circuit Intermittent |
| P0741 | Torque Converter Clutch Circuit |
| P0742 | Torque Converter Clutch Circuit Stuck On |
| P0751 | Shift Solenoid 'A' Performance or Stuck Off |
| P0756 | Shift Solenoid 'B' Performance or Stuck Off |
| P0776 | Pressure Control Solenoid 'B' Performance or Stuck Off |
| P0796 | Pressure Control Solenoid 'C' Performance or Stuck off |
| P0816 | Transmission Fluid Pressure Manual Valve Position Switch Park/Neutral with Drive Ratio |
| P0816 | Downshift Switch Circuit |
| P0826 | Up and Down Shift Switch Circuit |
| P0842 | Transmission Fluid Pressure Sensor/Switch A Circuit Low |
| P0850 | Park/Neutral Switch Input Circuit |
| P0851 | Park/Neutral Switch Input Circuit Low |
| P0852 | Park/Neutral Switch Input Circuit High |
| P0961 | Pressure Control Solenoid A Control Circuit Range/Performance |
| P0962 | Pressure Control Solenoid A Control Circuit Low |
| P0963 | Pressure Control Solenoid A Control Circuit High |
| P0965 | Pressure Control Solenoid B Control Circuit Range/Performance |
| P0966 | Pressure Control Solenoid B Control Circuit Low |
| P0967 | Pressure Control Solenoid B Control Circuit High |
| P0969 | Pressure Control Solenoid C Control Circuit Range/Performance |
| P0970 | Pressure Control Solenoid C Control Circuit Low |
| P0971 | Pressure Control Solenoid C Control Circuit High |
| P0973 | Shift Solenoid A Control Circuit Low |
| P0974 | Shift Solenoid A Control Circuit High |
| P0976 | Shift Solenoid B Control Circuit Low |
| P0977 | Shift Solenoid B Control Circuit High |
| P2714 | Pressure Control Solenoid D Performance or Stuck Off |
| P2723 | Pressure Control Solenoid E Stuck Off |
GMC Acadia Recalls
2014 GMC Acadia Recall 14V092000 / 14048
Summary – According to the recall, the GMC Acadia transmission shift lever may become detached from the transmission shift cable adjuster. If this happens, the transmission shifter won’t work properly, and the gear indicator won’t be able to display the gear that’s actually selected.
Consequence – Should the shifter become detached while the truck is being driven, the driver won’t be able to select Park, even though the shifter is in the correct position. This can lead to an unintended rollaway, resulting in serious property damage and/or injury.
Remedy – This recall began on April 10, 2014, and GMC dealers were instructed to inspect and replace any affected transmission shift cable adjusters, free of charge. Owners can contact GMC at 1-800-462-8782, referring to recall # 14048. Or they can call the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236
2009 GMC Acadia Recall 09V073000 / 09041
Summary – On some 2009 models, the transmission shift cable adjustment clip may come loose, causing the gear indicator to display the wrong gear.
Consequence – If this problem occurs, the driver could remove the ignition key and exit the vehicle thinking the transmission is in Park, even though it isn’t. This can lead to a rollaway, which can cause injury and/or property damage. A lesser consequence would be the inability to start the vehicle because the transmission is not in Park.
Remedy – This recall began on March 24, 2009, and GMC dealers were instructed to inspect and replace any affected transmission shift cable adjustment clips, free of charge. Owners can contact GMC at 1-800-462-8782, referring to recall # 09041. Or they can call the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236
GMC Acadia Technical Service Bulletins (TSB)
TSB 07-07-30-019 – Check engine light on with poor vehicle performance – 6T70 Transmission | 6T75 Transmission
2008 Buick Enclave – 2007 GMC Acadia – 2007 Pontiac G6 – 2007 Saturn Aura – 2007 Saturn Outlook
Problem – Drivers may experience poor engine/transmission performance, along with the following transmission diagnostic trouble codes: P0716, P0717, P0722, P0723, P0751, P0756, P0776, P0796, P2714, P2723
Solution – These transmission problems may be caused by a failed speed sensor.
TSB 09-07-30-012B – 2008-2009 GMC Acadia
Problem – Owners may experience a Check Engine/SES light along with no reverse and/or a slip / flare or harsh shifts in 3rd and/or 5th gear. This condition may be caused by a broken 3-5-R clutch wave plate, allowing the apply piston to over- stroke, causing the piston to leak and causing loss of gear application. This normally will not occur before approximately 32,000 km (20,000 mi). Debris generated by the condition can affect the operation of the speed sensors and other clutches.
Solution – A new 35R clutch wave plate will need to be installed.
PIP4627A – 35R clutch wave plate broken – 6T70 Transmission | 6T75 Transmission
2007 – 2009 Saturn Aura – 2007 – 2009 Saturn Outlook – 2008 – 2009 Saturn Vue – 2007 – 2009 GMC Acadia – 2007 – 2009 Pontiac G5 – 2008 – 2009 Pontiac Torrent – 2008 – 2009 Buick Enclave – 2008 – 2009 Chevrolet Equinox – 2008 – 2009 Chevrolet Malibu – 2009 Chevrolet Traverse
Problem – On vehicles equipped with the 3.6L V6 and 6-speed automatic transmission, drivers may experience no reverse, slipping, and/or harsh shifting between 3rd-5th gears. They may also have diagnostic trouble codes P0776 and P0842. This condition is typically caused by a broken 35R clutch wave plate.
Solution – During the repair/rebuild process, the wave plate must be installed properly (with the rounded edge of the internal splines facing the 35R piston), in order to prevent premature failure.
TSB 13120A – Torque converter clutch sticking – 6T70 Transmission | 6T75 Transmission
2013 Buick Enclave – 2013 Cadillac SRX – 2013 Cadillac XTS – 2013 Chevrolet Malibu – 2013 Chevrolet Traverse – 2013 GMC Acadia – 2013 GMC Terrain
Problem – The torque converter clutch solenoid can stick due to debris in the transmission. When the vehicle is at the end of a coast-down, as the vehicle is coming to a stop, a stuck solenoid will fail to release the torque converter clutch. This keeps the engine directly connected to the driven wheels. As the vehicle stops, the engine speed will be pulled down below normal idle speed and the engine may stall. The vehicle can be immediately restarted and driven.
Solution – The valve control solenoid should be replaced, and the transmission control module will have to be reprogrammed in order to correct the problem.
2009 Acadia – TSB PIP4668
Problem: Symptoms associated with this service bulletin include:
- Hesitation when accelerating during a right hand turn around 15 mph.
2. Hesitation/delay/harsh shift around 40 mph during 5-3-2 shift.
3. Low speed hesitation during a 2-3 shift on light acceleration after launch.
4. Cruise control busyness around 50 mph and/or poor shift feel.
5 .Delayed up-shift after a forced throttle downshift after returning to normal throttle.
6. Nonlinear deceleration feel and/or tachometer swing on 5-4 coast-down shift as a result of entering and exiting Decel Fuel Cut Off (DFCO)
Solution: The transmission control module will have to be reprogrammed in order to correct these problems.
Common Problems with the GMC Acadia Transmission
Related to DTC P0741 – 2008-2010 GMC Acadia
Problem – If after rebuilding a 6T75E, the TCC remains stuck in the ‘off’ position, the problem may be due to using the incorrect control valve channel upper plate.
Solution – Install a revised control valve channel upper plate with slot (GM part #24226373).
Input/Output Speed Sensor Issues – 6T70E Transmission
Problem – When repairing a failed input speed sensor or output speed sensor, steering system damage could occur.
Solution – To avoid damage to the clock springs, the splined steering knuckle must be prevented from falling out of the steering rack when dropping the subframe to access the valve body.
Lack of Response
Leaking Fluid
Low Fluid
Burning Smell
Grinding or Shaking
Whining, Clunking or Humming
Refuses to Go Into Gear
Torque Converter Issues
Valve Body Issues
Transmission Noisy in Neutral
Gears Slipping
No 3rd or 4th Gear
No 1st or 2nd Gear
No Reverse
Dragging Clutch
Trouble Codes / Check Engine Light
What Transmission Do I Have?
How to Diagnose & Fix
- Check the OBD Codes
- Check the fluid level
- Test transmission pressure
- Drop the transmission pan
- Repair, replace or rebuild
What to Read Next
Related Forum Discussions
Over to You
[yop_poll id=”6″] [yop_poll id=”5″]What Problem Does Your Acadia Have?
Let us know the year, mileage and problem you’re having as well as any trouble (OBD) codes you’ve found. If you’ve been given a quote or paid for a repair, we’d like to hear about that too!
Transmission stutter when accelerating at low rpm,2008 GMC acadia
I have 2009 Acadia with 200k replaced motor at 186k now when I am at a stop on take off there is a clunk sound Any clue as to what it could be
Shifts hard when downshifting.
When put it in park and press on gas it goes forward but I put it in reverse it doesn’t move… put it in neutral and press gas it also goes forward.. every gear including park goes forward when press on gas but have no reverse
2007 gmc a Acadia, having problems shifting out of a low gear
2016 g m c Acadia Denali with 71000 miles on it got in at the other day and would not shift into third stop checked fluid fluid is full at that time discovered I had no reverse gear also was able to get it moving again and jump over 3rd and a high gear onto the highway After exiting the highway it would not shift out of second gear but was able to slowly drive it home just bought it two months ago from GMC dealer spent $28,000 on it and do not have another 5,000 to spend for a new transmission highly upset
trans will not shift in to R and or OD at times must drive in low than it will shift oil full new filters
Transmission hesitates going from 4th to 5th gear and sometimes between 3rd and 4th gear. Is this strictly the valve body and/or four switches or it’s solenoids. Or is it deeper into the transmission clutches?
Been slipping for a while… transmission overheated and and engine light came on. Code is P0634 stored. Trans oil seems “burnt”
Shuddering occurs at around 30 mph then again around 40 mph. Shuddering is frequent while climbing. Another issue recently occurring is shifting from park to drive. Shifter hesitates then Acadia bucks forward into gear.
I have a 2010 Acaidia and there are times when i can take off and it will go thru the first gear but will not shift into second Iits like its in neutral I can pull over turn it off start it back up and it goes fine . I have had it in the shop 3 times they say they cant find the problem says it never does it when they drive it but it happen twice to me with in the last hour HELP
I also have 2010 doing exactly same think, I’m thinking it’s more about my battery being drained too much after an overnight sit… Mine after drove for a bit, what I thought was “warming up” is actually the alternator charging the battery enough to make transmission work properly… I had one transmission guy tell me the battery will effect it, but I’m on here trying to figure out if this is true..
when I give it gas it sounds like its flooding, low hum, it goes but slow. at around 20, release gas and reapply, it starts to pick up momentum, but nothing like it use to. this was a quick, fast car. now its getting 11 mpg, bogging down and shifting hard. chevy says ,3 times, that its not throwing a code so its all good. I need help bad. noone at chevy drives it so they charge me for nothing. need help badly.
2016 acadia wont shift on its own but will in slap shift. Can’t give you the code shes 2 hours away.
08 GMC Acadia v6 won’t shift out of first. After I shut it off for a minute then start it up it runs fine again
Well one day my wife was driving it from the grocery store turned the corner and it was like you should get it into neutral now there is no gears know first second or drive no reverse just nothing like the transmission is no good what do I do
Help same problem here
I have an 2007 gmc acaida with 186000 miles. Its front wheel drive amd I have replaced the transmission two different times now. I have replaced all of the mounts also. My problem it that over harsh bumps the transmission will down shift amd or jerks violently. I havent seen any fixes yet but I’m taking amy advice at this point. No trouble code neither.
Shutters at about 35 mph.Seems to be while shifting gears.
My post about hesitation was for my 2014 GMC Acadia Denali.
When taking off from full stop, I get hesitation through first and second gears then no issue after that. Dealer says no codes but suggesting tear down or replacing transmission.
My 2001 gmc arcadia has a shuddering or vibration at speeds of 30 45 mph then goes away
My 2014 gmc arcadia has a shuddering or vibration between the speeds of 30 to 45 mph then goes away
I flushed my 2014 acadia denali transmission and the vibration went away. Still having problems with a feeling of the gears slipping somewhere between 2nd and 3rd. Not sure if i need a rebuild or replacement.