My car automatic transmission is acting up when shifting from gear 5-6. It slips and it feels like the car is on Neutral for few seconds ( the engine RPM goes up to more than 4000 RPM)after it shifts to the 6th gear. When It shifts it feels like somebody hit us from the back. This is happening in internal roads, intermittently and on speed around 30mph. I'm worried this will cause the cars behind us to hit us when it happens. Everytime it occurs my baby starts crying. I'm concern about the safety of my family when we drive this car. I took the car to the dealership multiple times and they said that there's nothing wrong with the car.

- North Attleboro , MA, USA

I bought this car a couple of months ago. This problem didn't happen when I took it on a test drive from dealership. It happened after I bought it. Specifically when I start driving it more often. Sometimes a slipping occurs when shifting between gears 5-6. This happens intermittently on internal roads, not at high speed. When the car shifts the RPM goes up to 4000 RPM, sometimes even more, it feels like the car is in neutral for a few seconds, before it switches to the 6th gear. I have to remove my foot from the gas pedal to not let the RPM get very high. When this happens it feels like somebody hit us from the back. Last time my baby started crying when this happens. I'm a little concerned about our safety when we drive this car. The issue is that this problem is difficult to duplicate. Sometimes it happens more than once in 1 day and sometimes it doesn't happen for a while. I did some research online about similar cases with GM SUVs and some said that their problem was resolved after changing a defective valve Body and TCM and some said it's the clutch. It also can be transmission fluid but this car has a low mileage (28500) I doubt the transmission fluid need to be changed. Based on the GMC maintenance schedule, the transmission oil should be changed when this car reaches 45k. I took this car to the dealership multiple times, they check it and they tell me that they're unable to duplicate this issue. I'm not sure what else to do! I love this car. I'm disappointed that I had to deal with this issue that I believe is a safety hazard and could cause accidents. I need your help please!

- North Attleboro , MA, USA

Transmission slips from cold start No. Have not taken to Dealer No. No. Warning lights or messages

- Jacksonville, NC, USA

The car failed to shift into gear. Message displayed, "transmission unable to shift","2 gears selected " or "service transmission". Issued started in June 2022 while in drive thru line, when shifting from park to move the car would not shift. Had to turn car off for about 10 minutes and car was able to shift and drive normal. Check engine light came on about a week later and had checked for code p07b5. A couple of days later, light went back off. About 3 days later getting ready to leave home and car would not shift into gear again but turn car off and back on a couple of times and car shifted and drove normal. On July 13 2022 was driving in traffic and message displayed, unable to shift and service transmission. When I changed lanes and released the gas petal, the car went into park, stopped, and set the parking brakes, but did not turn off, jerking me forward and throwing things around in the car. Cars behind me had to slam on brakes to keep from hitting me because there was no initial brake light. I put on the flashers and turned the car off. Parking brake was stuck so I pressed it about 5 times before it finally released. I restarted the car 3 times and it finally shifted and drove as normal. I called gm to inquiry about a recall and was told there were none. I called for a diagnostic test and schedule is in about 2 weeks. The car has not been inspected by anyone listed above?-¸

- Columbia, SC, USA

Brakes quit working after service light came on. Vehicle will not stop

- Roann, IN, USA

The autoshutoff of the vehicle should be optional this vehicle goes on and off so many times and after it starts is acting up on braking and transmission deeler says no dtc all good but still doin

- Hereford , TX, USA

I received a "service brake assist" message which came on then off. Took the car to a local mechanic who looked it over and said to see dealer as they saw nothing obvious. internet search revealed that many people with terrain said this warning came on when battery was low. Made a service appt for NJ dealer for 12/6/21. on 12/3/21, began a 1200 mile drive from Florida to NJ, after 2 hours, check engine light came on. Took the exit ramp from I 75 and at end of ramp, there was a total braking failure. I had to press very hard to eventually stop. Shut off car, attempted to restart but it would not. Towed to a mechanic who found fluid leakage and a repair bulletin on GM site involving vacuum seal camshaft. #pip5598A diagnostic tip. Internet search reveals many anecdotal instances of same problem. On Monday, 12/6/21, I received an email from GMAC saying that the on board diagnostics had shown a "low battery" concern. The catastrophic loss of braking seems to be connected to a low battery situation. This needs to be looked into by NHTSA.

- Long Branch, NJ, USA

My 2019 GMC Terrain has 21K miles and noticed a oil or transmission leak this morning. I see recalls for other vehicles but none for mine. Linking from a bolt just as the other recall is for.

- Merrimack, NH, USA

Transmission would rev up between 4th and 5th gear only in the on the first drive. After that it would shift normally. Went into dekalb GMC Illinois and was told it was some pistons and other parts. They had it for a week or two because of other trans jobs ahead on mine. Got car back and it was working fine for a month or so and then it started to shift bad again between the same two gears only longer gap between shifts this time. Took it back to the dealer and the tech ordered more parts to repair the trans and said I would possibly get it back on October 19th by end of day. Is this going to be an ongoing problem? if so what is the law about 3 or more repairs for the same problem. This is the second repair so far.

- Dekalb, IL, USA

*Check engine light on, engine power is reduced is on, vehicle is surging up and down while in idle, vehicle stalled in service while in park. Charge air cooler tube to the throttle body spring retaining clamp tension weak. Verified charge air cooler tube came off throttle body. Inspected spring retaining clamp. Found spring retaining clamp tension weak. Installed new spring retaining clamp. Charge air cooler tube to throttle body now properly secured *Vehicle power / engine power was reduced while on the highway *Problem has been confirmed by LaFontaine of Ann Arbor, MI *Vehicle was inspected at LaFontaine of Ann Arbor, MI *Engine light came on and the Engine power is reduced message appeared on the dash.

- Ottawa Lake, MI, USA

*Check engine light on, Reduced Power Light is on, and Vehicle is surging up and down. *Driving on highway and Engine power is reduced, cars behind me honked until I could get over into the right lane because I was losing power., confirmed by LaFontaine of Ann Arbor, MI, inspected by LaFontaine of Ann Arbor MI Customer states check engine light on, reduced power light and the vehicle did have reduced power. Vehicle is surging up and down at an idel. GM assistance, submit for DMA approval to deviate on PET per Scott S DMA. N/C to customer per DMA, If an FSE is needed please submit request. Found air duct not connected to throttle body and throttle body is cause. Inspected and found air duct loose on throttle body. inspected to find throttle body edge is wore and is cause. removed and replaced throttle body to address fail code P0101. 4021510 0.8 and add 1.0 diag, Engine Power is Reduced light and Engine light was

- Ottawa Lake, MI, USA

*Service trans, check engine, stabilitrak, gas light, would not come out of 1st gear, stalled, started back up and jerked on the way to dealership, locks were flickering, lights would not light up for the PRNDL, shift to park message on, and vehicle would not start back up when pulled into service drive. *would not shift out of 1st gear while in traffic, vehicle stalled in traffic, vehicle jerked whi9le driving. *Confirmed by LaFontaine of Ann Arbor, MI *Vehicle inspected by LaFontaine of Ann Arbor, MI Service trans, check engine, stabilitrak, gas light, would not come out of 1st gear, stalled, started back up and jerked on the way to dealership, locks were flickering, lights would not light up for the PRNDL, shift to park message on, and vehicle would not start back up when pulled into service drive. TAC Case # 9-6556499036. Tech 24694 worked with Field Engineer and checked wiring, terminals, and connectors at high speed comm modules and found all passed, replaced BCM and still had concern. Tech 1235 bypassed modules and test drover to eliminate diff control module, EBCM and when EBCM was bypassed concern never returned OSYN9761769 Tech 56653 completed BCM replacement and programming, wire, terminals and connector checks with engineer. Tech 1235 replaced EBCM assembly, OP code 2410330 completed diag by bypassing modules and completed bleeding brakes.Tech 1235 total repair 3.9. Tech 56553 performed BCM replacement. 2.9 base time, 4.8 OLH. Repairs approved per DMA approval / PET Sheet. Test drove vehicle 139 miles without a concern.

- Ottawa Lake, MI, USA

*Service Transmission message and vehicle goes into neutral. *Vehicle loses power, almost got rear ended by an 18 wheeler when trying to pull over to the shoulder of the highway., LaFontaine of Ann Arbor, MI confirmed *Inspected by LaFontaine of Ann Arbor, MI - Cust states the service transmission message light is coming on and the vehicle goes into neutral and stalls, service ll wheel drive message coming on, traction light coming on, customer going about 74 mph and the speedo gauge dropping out, low fuel light coming on even though it has fuel. Per DMA and GM Executive the repairs will be covered 100 %, send DMA pre approval and PET. There is a broken or loose communication wire intermittently disconnecting and causing multiple modules to fault. Could not find broken wire. Request # 9-6483892482 replaced engine harness OP 4069760 ST Time. 8.3 hours Per PET, DMA Pre Auth., warning lamps, messages were on the dash

- Ottawa Lake, MI, USA

service transmission message coming on and the vehicle goes into neutral and stalls, service transmission light comes on while on highway and the vehicle goes into park and loses power and stalls, All wheel drive message coming on, traction light coming on, going about 74 mph on highway and speed gauge dropping, low fuel light coming on even thought it has 3/4 tank of gas. almost got ran into from behind twice when the vehicle went into neutral and into park by an 18 wheeler truck as I was trying to pull over onto the shoulder of the highway. *Confirmed by LaFontaine in Ann Arbor, MI *Vehicle has been inspected by LaFontaine in Ann Arbor, MI. Found bulletin 19-NA-181 which was very close to all symptoms and stated to check for chaffed wires near the ECM. Found no spots in the tape where it was rubbed through but lost comms when wires were shook. Unwrapped main engine harness loom and inspected wires, found nothing. Started TAC Case # 9-6385087421 and was told it probably is a chaffed comms wire somewhere and gave me multiple locations to check. Found no damaged wires in those locations and shaking main harness no longer would make it fault. Put it all together and drove it down the road and faulted immediately. Unwrapped main harness again snd sprayed with saltwater to help conductivity but still couldn't get it to fault while shaking the harness. Only way it will fault is when shifting into drive the drive train bumps just right to bend the right wire. Checked every wire I could find and can't find the problem wire. Not drivable. When this vehicle faults it will not shift past 1st gear and sometimes locks out reverse. Must be towed. Needs the main wiring harness to start, recommend customer to authorize FSE to dealership CUST declined., all the lights and messages were coming on over the dash.

- Ottawa Lake, MI, USA

*Check Engine Light on, Short to Voltage inside Hood Switch Setting P257F. Switch Must Be Replaced, Recall N192216311 Cust May be Able to Shift Out of Park OP 9104813 Reprogram ECM.3 WCC 11YN37748687 *Scared to drive vehicle when the hood switch was the problem. Did not want to driveon the road and the hood fly up and I would be unable to see out of the front windshield., vehicle inspected by LaFontaine in Ann Arbor, MI. *Vehicle was inspected by LaFontaine in Ann Arbor, MI. *Engine Light was on.

- Ottawa Lake, MI, USA

*Trans clutch drag recall *While driving, it would take a minute to shift gears and the vehicles behind me would ride up on the back of my car until it would shift into the next gear and pick up speed to do the speed limit. *Took the Terrain to aFontaine in Ann Arbor, MI and the service center reprogramed the Transmission Control Module and setup with SPS 0.7, the vehicle was inspected by LaFontaine dealership in Ann Arbor, MI warning messages, I could hear the transmission not shifting when it should be. The transmission problem starting happening in Sept 2019 and brought it into the dealership in Oct 2019.

- Ottawa Lake, MI, USA

When I shift it from reverse to drive on a very slight incline, the engine will rev and not accelerate after I initially start moving forward. It actually almost comes to a stop before finally accelerating. It has now started doing it while driving and stalled in the highway on 2/13. I carried it last year for the same issue, but they told me they couldn't duplicate it. Today, they told me the same thing. They can't explain why it stalled in the middle of the road. Even though the check engine light came on and on-star told me to carry it to a dealer. The service tech guy also told me that my vehicle had 67,000 miles on it. It has less than 30,000 (not sure on the exact number since it is still at the dealership.) it is no longer safe to drive, but since they cannot duplicate it, they aren't even going to investigate it further.

- Erin, TN, USA

The contact owns a 2019 GMC Terrain. While driving, the transmission kept slipping between second and third gear and a grinding noise was heard. The vehicle was taken to peruzzi Buick GMC (156 Lincoln ave, fairless hills, pa 19030, (866) 526-8445) where the computer was reprogrammed. The contact stated that the vehicle was previously involved in a crash and the engine was replaced. The vehicle was taken back to the same dealer because the transmission continued to slip. The dealer replaced the 02 sensor, but the failure recurred. The contact stated that the transmission was previously repaired per an unknown recall. The manufacturer was not notified of the failure. The failure mileage was 10,000.

- Levitton, PA, USA

The contact owns a 2019 GMC Terrain. While driving approximately 40-70 mph, the vehicle lost power and independently decelerated. The vehicle was taken to shamaley Buick GMC (located at 955 crockett St, el paso, tx 79922, (915) 231-4000) where it was diagnosed that the transmission needed to be repaired and the power train control module needed to be updated. The vehicle was repaired; however, the failure recurred. The contact stated that the vehicle experienced the failure on four separate occasions. The manufacturer was notified of the failure and provided case number: 95389790118. The approximate failure mileage was 17,000. The VIN was invalid.

- El Paso, TX, USA

On or about May 22nd, I leased a new GMC Terrain from lambert GMC in cuyahoga falls, Ohio. On July 2 with less than 1900 miles on the vehicle, the transmission gave out enacting full emergency braking system in the middle of a 4 lane road creating a dangerous situation. The vehicle would not drive or engage in any gear. Vehicle was towed to ron marhofer in North canton Ohio. Finally after a week delay on 7/8 I received a call that the value case was damaged from manufacturing. As of this complaint, no resolve to the repair. I am requesting/demanding under good faith that GM purchase the vehicle back.

- Canton, OH, USA