Loss of engine power is an ongoing issue for certain GMC Terrain vehicles, with 2018 through 2022 GMC Terrain units previously experiencing the problem. If you own a 2023 through 2025 GMC Terrain and experience reduced engine power, a new bulletin from GM details a possible cause and an available fix.
The problem described in GM bulletin number PIP5927B will cause both loss of engine power and one or more diagnostic trouble codes (DTCs) to be generated as well. Service technicians can use these codes to verify whether power loss in your 2025 GMC Terrain is indeed related to the described hose issue. These DTCs are listed below:
- P0237 (Manifold Absolute Pressure (MAP) sensor A, turbocharger (TC) circuit low input)
- P0101 (Mass Air Flow (MAF) Sensor Performance)
- P1101 (Intake Air Flow System Performance)
- P0299 (Engine Underboost)
As a reminder, all affected GMC Terrain units are equipped with the standard engine for the model, the turbocharged 1.5L I4 LSD gasoline engine developing 175 horsepower. Damage to the Charge Air Inlet Pipe at the point where it enters the LSD engine’s turbocharger is what mechanics need to inspect for to verify the source of your crossover’s lost engine power.
The first sign of the hose problem that dealer service will check for is splitting or shredding of the Charge Air hose anti-abrasion sleeve. If this is present, they will follow up with inspection of the hose for splits. A split can cause hose swelling, throwing off the boost control system readings, or an air leak, reducing the air charge.
If the 2025 GMC Terrain has engine power reduction, a damaged Charge Air hose, and one or more of the DTCs noted, dealer service will replace the Charge Air Inlet Pipe assembly. This should fix the issue for most hose-related cases.
The same issue also occurs in 2023 through 2025 Chevy Equinox crossovers with the LSD engine. Notably, the 2025 GMC Terrain ushers in the vehicle’s next generation but retains the same engine as immediately previous model years.
Production of the 2025 model year recently started at the GM San Luis Potosà plant in Mexico, the nameplate’s exclusive place of manufacture.
Comments
The 2025 is already involved in this when production has just begun? Oh, that’s a GOOD one, GM!
Why would this hose split so soon? Maybe needs better materials!
And now we know one place where they are cost cutting. Makes you wonder where else this is the case!
“Professional Grade”
I appreciate that they kept the 2025 price low, but man, they’ve been having this problem since 2018. There should be a fix in production by now.
The Trailblazer is having the same issue…it’s being reported all over the forums. I know I’m jinxing myself, but luckily so far my ’21 TB Activ hasn’t had this happen.
Loss of power is because they stuck that junk underpowered 1.5L in it. Should have kept the 2.0L in it. Or offer the 3.6L as a Denali and RS engine upgrade! Look at all the article reviews on new equinox and terrain. Engine is number 1 issue.
That 1.5 has been a pretty good engine as a base engine, it has reviewed fairly well and is competitive with the competition. Problem is the others offer more options, but one is coming in the form of a hybrid, so that will take care of that. In the mean time the 1.5 is far from junk or underpowered. The massive torque it has compared to the competition makes it drive much better pulling from stop lights and keeps it from downshifting on the highway, though it does struggle on foot to the floor passing maneuvers at highway speeds which lets be honest, is done .0003% of the time. So lets stop with the name calling, the motor is exactly what it needs to be and if it was so bad, would have been replaced. 0-60 in 8 seconds isn’t slow, and don’t forget there was another option BUT NO ONE BOUGHT IT, so blame yourselves. The 1.5 has been fairly reliable, good on gas and low on maintenance. So not sure why it gets so much hate. Instead of wrongfully insulting this engine, maybe campaign for it not having another option. But like noted before, one is on the horizon. All the wrong info and name calling just further loses your credibility…
@TMI
Name calling? What are you 5 years old. I said the engine is terrible and it is. C/D has it going feom 0 to 60 in 8.6 seconds. Pathetic.
Also, my grandfather’s both have the 1.5L and can’t stand it. Would rather have the old 3.6 back. The 3.6l in the terrain and equinox got just as good mpgs as the old 2.4L. And real world driving could get just as good or close to the 1.5L. That engine is screaming down the interstate at 65 to 70 mph. I had a terrain and it was one of the best vehicles I’ve ever owned. Have you owned one??? Or maybe you are just spewing nonsense again?
Trouble first showed up in 2018, it is now late in 2024 and issue still there. What is GM doing?? Keep putting out the same junk as 2018. Great job Mary, your doing a great job…………. NOT !!!
To be straight up I have a 2018 Terrain and I have had her for 3 years and I take very good care of i have had no problems at all I have ppl sayen trade her in well guess what HellNo u treat or car good she will be good to u so thank u GMC