Chevy 1500 2.7L TURBO 4 Cylinder (L3B) **Heavy Mechanic Review** | Should You Buy It ??
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Published 2023-03-19
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I hope everyone had a good weekend. I have to say when I was doing research on this 2.7L inline 4 turbo charged engine from GM I was a little shocked with the amount of technology shoved inside it! Made for a longer video but hopefully you guys like it
so for starters this engine is making a tremendous amount of torque at 430 which to me is wild out of a 4 cylinder turbo charged engine.
the first thing I really liked about this gmc sierra 1500 2.7L turbo is how large the stroke of the engine is. the stroke is just over 4 inches which is larger then the 6.6L Duramax diesel. and having a long stroke really helps to create torque and create torque low in the rpm bands. perfect for towing and pulling heavy loads.
the second thing I like is that GM mounted this engine longitudinally meaning that the turbo piping is very simple. exhaust of passenger side and intake of driver side.
the third thing I like about this is the drivability, this engine does drive very well and the power delivery and throttle response are very good. GM did a good job really setting this engine up elimination almost all turbo lag.
the first common issue is lifter failures with this 2.7L turbo charged engine most like attributed to the active fuel management system from gm.
the second most common issue has to do with the direct injection fuel system. the result is carbon build up on the intake and the intake valves causing less air flow to get into the engine. this can cause loss of power, misfires and rough idling.
the third issues I chat about is the fuel economy. long story short this engine should be getting much better fuel economy then people are seeing. to me if you can't get amazing fuel economy out of the 4 cylinder engine what is the point of even having this engine. GM's own 5.3L v8 gets better highway fuel mileage.
and the fourth concern I have with this engine is all the new technology shoved into this engine could result in less reliability and longevity then a simply naturally asperated v8
I hope you guys liked the video!
All Comments (21)
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Check out me towing 8,000lbs through the Appalachian mountains with this BEAST - https://youtu.be/xbcvOhSSGmk
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I have at least one thing in common with that engine: we both have a long stroke. Ok, I'm sorry. I couldn’t pass that up
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My 2021 Silverado has the 2.7 turbo. I've had no problems. I was able to get the regular cab with a long box for $37K brand new from a dealership. It's my first new truck and also my first full sized truck.
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OHC engines don't have push rods or lifters. The issue with the AFM on the GM V8s and V6s is primarily due to failed lifters.
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I just bought a '23 Silverado 2.7. It has gobs of torque down low where a truck needs it. It feels very utilitarian, but that's what I wanted.
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GM should build an inline 6 version of this engine. 400 hp and 600tq on 87 octane mated to a 10 speed would be interesting. Probably not that great of fuel economy though.
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I've owned one since 2021 Memorial Day weekend. So far I have 71000+ miles on it and no issues. I generally get over 23mpg with it on the highway and about 20mpg with just regular driving. When I pull my landscape trailer the mileage goes down to about 15 or so. The trailer has a High gate on the back that creates a lot of wind resistance. We'll see how it goes from here!
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I like the turbo sound. H.P. and torque are impressive. Thanks for this share I've been wondering about this one. Nice to hear from an expert.
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The actual head engineer that helped developed this engine says that this motor was designed to run on 87 octane and not premium. In this day and age I still can't believe the amount of people that still believe running higher than recommended octane in your car or truck will increase performance or gas mileage. If it's designed to run on 87 you're gaining nothing by running premium. 🤦
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Very informative video sir! I bought my 2019 Silverado 2.7 in December of same year. I got a screamin deal, (probably because a lot of people were scared of it! 😮) so I purchased an extended warranty. The most heavy thing I tow is my motorcycle. So far at about 44,000 miles it has been good.
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I owned the original 2.7T in a 2019 Silverado for 3 years (LT package but used for work truck). I put 147,000 miles on it and it ran exceptionally great. No issues at all. Literally changed the oil every 7,000 miles and that’s it. Maybe it’s because I put the miles on so quickly but I was impressed with this engine. The 8 speed not so much, therefore I now have the 10 speed with the 5.3 👍
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I’ve been waiting on a review of this engine for some time thanks.
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Great video Alex - man, you nailed it when you said there are a lot of complex systems and active components that have the potential to breakdown - hopefully GM can iron out the failures/issues in what I think is pretty neat technology - You’re back in ON again?! Welcome, thanks and cheers
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I just purchased a 2024 GMC truck with 2.7 turbo I think I will get over 200k they make great trucks, my last two GMC trucks I got over 200k miles they had the V8 I’m staying positive on this engine.
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I just purchased a 2024 with the 2.7 I4 I appreciate the knowledge you was given, I’ll definitely keep you updated on the results as I go
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I get 18ish around town (casual) driving and 24mpg when I took a road trip (all highway) the end of last year. The 2.7HO is one of my favorite engines and I got it "kicking and screaming". It was a budget decision and it has been great after a year. Even better than my previous 3- 5.3's!
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Alex Yes this motor has a lot of Tech in it. But you might want to look at the internals of the L3b before making a blanket statement about AFM lifters failing like the v-8 versions. This engine is DOHC that uses camshaft follower and hydraulic lash adjusters. Nothing in this engine is like the AFM lifters/system in the 5.3/6.2.
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Another great review. I had 100k before trading it in. I found the truck to be very light and didn't have balls when passing semi trucks. But it passed all the work tasks.
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A 3.5L inline six would be nice. Basically a modernized 216 ci. that was used successfully for decades. Well balanced and tough, a good platform to build on.
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I appreciate the comments made in the video. These primarily sound like concerns you have with architecture being used rather than empirical issues specific to this engine.
