2019 GMC Terrain

The contact's wife owns a 2019 GMC Terrain. The contact stated that upon making a left turn, the steering wheel would forcefully jerk to right, thrusting the vehicle into the opposite direction. The contact stated that the service ESC and service brake assist warning lights were illuminated. The warning lights would disappear soon after the failure as well as upon restart. The contact had taken the vehicle to the dealer on multiple occasions where he was repeatedly informed that unless the service light was illuminated upon arrival to the dealer, they would be unable to service the vehicle. The vehicle remained in the possession of the dealer and was not repaired. The manufacturer had yet to be notified of the failure. The failure mileage was unknown.

A COUPLE WEEKS AGO I GOT IN MY 2019 GMC TERRAIN AND SHIFTED INTO REVERSE AND MY BACK-UP CAMERA WAS NOT WORKING. IT WAS A BLUE SCREEN THAT SAID "SERVICE REAR VISION SYSTEM". A COUPLE DAYS LATER IT STARTED WORKING AGAIN. MY CAR SAT FOR A WK AND I GOT IN IT ON MAY 28 TO HELP MY DAUGHTER MOVE AND IT WASN'T WORKING AGAIN. THIS IS A SERIOUS SAFETY ISSUE NOT ONLY TO ME, BUT TO ANYONE (LIKE MY GRANDKIDS) OR ANYTHING BEHIND MY CAR AS I'M BACKING UP, ESPECIALLY IF I CANNOT SEE THEM.

While driving the car cut off on us. Started the car and the dash lights were on. Also Navigation stopped working. Took the car to bellamy Strickland and they said no issues was found. Got the car back 12/02_2021 Car seems to be ok at the moment. Melissa at bellamy stated it could have been a computer glitch. Car only has 20k miles on it.

*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.

*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. *Yes, confirmed by LaFontaine of Ann Arbor, MI *Yes, 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 *yes, Engine Power is Reduced light and Engine light was on

*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.

*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. *Yes, 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. *Yes, warning lamps, messages were on the dash

*The 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. *I 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. *Yes, all the lights and messages were coming on over the dash.

*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. *Yes, vehicle inspected by LaFontaine in Ann Arbor, MI. *Vehicle was inspected by LaFontaine in Ann Arbor, MI. *Engine Light was on.