An issue has been identified with the third-generation GMC Acadia powered by the turbocharged 2.5L I4 LK0 engine. The problem is low or erratic oil pressure at idle in some models. Luckily, a fix is now available for the issue.
To identify whether your crossover is experiencing this problem, verify erratic oil pressure at idle by monitoring rapid toggling of oil pressure. It tends to occur while the engine oil temperature is warm.
Once confirmed, here’s how the technicians at your local dealer can fix it. They’ll remove the oil pan and balancer shaft assembly and inspect the four-piston oil nozzles shown in Figure 3 below.
Fig. 3
If the center portion of the nozzle is loose or missing from the piston nozzle, as in Figure 4 below, that’s the root of the problem.
Fig. 4
The center portion components may be sitting on top of the balancer shaft assembly in the oil pick-up screen when the nozzle is removed. They could also be in the bottom of the oil pan. If this is the case, it would look like Figure 5 below.
Fig. 5
In some cases, some components from the center portion of the oil nozzles can exit the engine through the drain plug during an oil change. They would look like the pieces in Figure 6 below.
Fig. 6
GM recommends replacing all piston oil nozzles if any nozzles are found to be missing components. This is the safest way to ensure proper oil pressure and engine lubrication. GM techs will follow the procedures in the appropriate service information documentation to replace the nozzles.
Fig. 7
The GMC Acadia three-row crossover made the switch to a sole turbocharged four-cylinder engine option when it entered its third generation for the 2024 model year. Other changes with the new generation include an aesthetic overhaul inside and out, a bigger size with a roomier interior in line with the Chevy Traverse and Buick Enclave, and available Super Cruise hands-free driving.
The turbocharged 2.5L I4 LK0 gasoline engine develops 328 horsepower and 326 pound-feet of torque. Under the body panels, the GMC Acadia rides on the GM C1 platform. Production of the 2025 model year kicked off on Monday, October 14th, 2024, at the GM Lansing Delta Township plant in Michigan.
Comments
I have trouble with an oil leak at my he front of my engine six months till today.
I have had it(Terrain) in the shop (Henry Brown) more than twice. But they have told me they can’t find one. That is until now. On 18, March I bought my Terrain in for an oil change. At the end of the I was told that Their was an oil leak coming from my engine. You could imagine my shock. Finally. What I’ve complained about was showed to the service mgr.. I didn’t even get an apology for all my pain and suffering.
Wow, engine parts coming out of the oil pan drain. I’ve been changing oil for 50 years and the only thing besides oil I’ve ever seen come out with the old oil was pieces of broken valve stem seals in 1960’s Fords. Saw lots of those back in the day.
And GM folded the Brand Quality department. Go figure.
Traded in 4 Gm vehicles before the end of 2024. And sold all our GM beginning of Jan
GM QC is the worst these days. GM brass is destroying the company from the inside. Very sad.
It’s not brass. It’s aluminum. But it is destroying it from the inside.
Brass is a term for the military, and for good reason, not civilians.
I’d ask for a complete engine replacement if this happened to mine, low oil pressure/oil starvation isn’t a joke. Who knows how crap that engine is gonna be down the road now.
Also, sounds like it’s the same part, was this an assembly error, or is the part falling apart afterwards?
Yes I agree especially in this case. One of the jobs of these nozzles is to squirt oil directly on the cylinder walls to lubricants the piston skirts. Without it there’s heat buildup and premature west of the piston skirts and cylinder walls. Eventually you will have piston slap which is noisy and accelerated wear. Not good for engine life.
Sorry I was a victim of autocorrect. Should be lubricate and wear not lubricants and west.
You’d think that in this year that they would have engineers who would be qualified to design an engine. I quit buying Gm after my 1996 GMC short box sport truck had engine problems at 96000 kms and GM wasted weeks fixing and never did . I sold the truck and never ever bought another GM
Why is this only on the Acadia? The Traverse shares the engine.