2019 GMC TERRAIN Forward Collision Avoidance Automatic Emergency Braking Problems

Break booster pressure sensor and engine underbooster causes the car to slam on breaks or not break at all.

I’m crying out to you because I bought a 2019 GMC Terrain in April of this year with about 14,000 miles. The suv ran great for about 2 months and since then I’ve been dealing with nothing but a nightmare. We’re dealing with a situation where the suv goes into park while driving. We’ve brought the suv multiple times to GMC dealership and even reached out to GMC, and had no luck resolving the issue. Last night, while driving to a family event, the suv went into park while I was driving. This is the 4th time since we got the suv. I’m scared for my safely in this suv, if you could please assist

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...

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 it

TL* THE CONTACT OWNS A 2019 GMC TERRAIN. WHILE DRIVING 70 MPH WITH THE CRUISE CONTROL ENGAGED, THE AUTOMATIC EMERGENCY BRAKING SYSTEM INDEPENDENTLY ACTIVATED AND THE SPEED DECELERATED TO 45 MPH. THE CONTACT DEPRESSED THE ACCELERATOR PEDAL AND THE VEHICLE RETURNED TO CRUISE CONTROL MODE. THERE WAS NO WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS TAKEN TO HALL BUICK GMC (LOCATED AT 3010 S SW LOOP 323, TYLER, TX 75701, (903) 771-2886) TO BE DIAGNOSED, BUT THE FAILURE COULD NOT BE DUPLICATED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED AND PROVIDED CASE NUMBER: 9-5110159147. THE CONTACT WAS REFERRED TO NHTSA. THE APPROXIMATE FAILURE MILEAGE WAS 4,473.