2018 GMC Terrain · symptom sheet
Engine stalls or loses power while driving
- 25owner reports
- 22,000median miles
- 0involved a crash
Newest report Aug 10, 2026 · checked Oct 2, 2026
116 of the 222 complaints on this car are about the engine. 25 of those describe stalling. Only brake wear is reported more often on this car.
Tick what matches of 25 reports
Stalling on other Terrain years
Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2016, 2017, 2026.
What this problem usually is
Stalling reports are some of the most alarming on the site. The engine quits while the car is moving, sometimes on a highway and sometimes at a stop. Many owners say it restarted right away and the dealer found no stored code, which is part of why these complaints pile up before anything gets fixed.
What got replaced
Few of these reports name the part that was replaced.
Recalls and investigations
3 recalls on the engine cover the 2018 model year. A recall on the same system isn't always the same failure, so read the defect text.
The start/stop accumulator endcap may have missing bolts.
The high pressure fuel pump may detach from its mounting flange, possibly resulting in the pump damaging the high pressure fuel line.
The right front intermediate driveshaft may fracture and separate while driving.
All 5 recalls on the 2018 GMC Terrain, with the owner complaints on each recalled system
When it happens
The middle half of failures fell between 4,200 and 55,200 miles, from the 17 reports that gave a mileage.
Is this a known problem?
The manufacturer has sent NHTSA 12 service bulletins or notices for the 2018 GMC Terrain that deal with this problem. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
This service bulletin provides repair information to correct a customer concern of No Crank, No Start, Quick Start/Stall, No FOB Detected, Key FOBs Inoperative, B3924 00, B3925 00, B3926 00, B3927 00, B3928 00 Set.
This service bulletin advises the tech that the rotational Clicking Noise Heard After Engine Shut Down may be normal characteristics of the vehicle.
This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on.
This service bulletin provides service information for customer concerns of an in-tank fuel pump whining noise, engine hard to start and/or stalls and Malfunction Indicator Lamp (MIL) is illuminated that may be caused by gelling of fuel in cold temperatures.
8 more on the 2018 GMC Terrain page.
What owners wrote
“Timing chain. It had no warning and failed due to poor design and gm in Europe fixed/addressed the issue by installing a plate behind the tensioner a part that isnât available in the us.”
Filed May 5, 2025
“I was driving my vehicle, there was no indication that the vehicle was in need of servicing or that something was wrong with the vehicle, no check engine lights were on. The vehicle stopped in mid traffic, just completely shut down in active traffic. I had to serve my vehicle in to the curb/median to stop if from hitting traffic ahead of me.”
Filed May 5, 2023
Should you keep driving it?
This page can't tell you that. 0 of 25 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Paid for this repair before a recall covered it? How recall reimbursement works
Other problems on this car
- Brakes grind, pulse or wear early 81 reports