Turbo At Last! - TerrainForum.net: GMC Terrain Forum
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post #1 of 16 (permalink) Old 07-20-2019, 05:02 PM Thread Starter
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Cool Turbo At Last!

I just took delivery of my 4th 'Nox since 2013. The best one yet, its a FWD 1.5L LT with the Convenience Pkg. Which means it includes the power liftgate [Yes!] Everything works great except the hands-free function is AWOL. Ditto the configuration of same in the Settings. Is that function limited to the Premiere trim or do I have a warranty visit in my future?

Also, is there some way to know when you're on the turbo?

Just put a second coat of Collinite 845 on the Nightfall Gray Metallic finish.

Thanks for any help.

[Looking forward to some highway work.]
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post #2 of 16 (permalink) Old 07-21-2019, 08:45 AM
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Quote:
Originally Posted by oldtux View Post
I just took delivery of my 4th 'Nox since 2013. The best one yet, its a FWD 1.5L LT with the Convenience Pkg. Which means it includes the power liftgate [Yes!] Everything works great except the hands-free function is AWOL. Ditto the configuration of same in the Settings. Is that function limited to the Premiere trim or do I have a warranty visit in my future?

Also, is there some way to know when you're on the turbo?

Just put a second coat of Collinite 845 on the Nightfall Gray Metallic finish.

Thanks for any help.

[Looking forward to some highway work.]

My Premier does have the hands free lift gate, I believe the LT models don't offer that feature.



No way to know when you're in the turbo, it's not very noticeable on the 1.5T, I had that motor in our last car, a 2016 Malibu...

Aaron from Medina, Ohio...



2018 Equinox Premier 2.0T AWD in Pepperdust - Wife's car

2016 Silverado LT Double Cab 5.3 4x4 - My truck.
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post #3 of 16 (permalink) Old 07-21-2019, 12:41 PM Thread Starter
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Thanks, imcrazy.
I think you're right about the LT lacking the hands-free tailgate. I'll bet it's just a matter of programming; the mechanism is there, and I believe they use the blind-spot warning sensors for the function.
FWIW, why not look at the instant MPG readout? If you're on the turbo it should go low; otherwise much higher?
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post #4 of 16 (permalink) Old 07-21-2019, 03:02 PM
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OLDTUX, Technically, you are always "on the turbo". In other words, some amount of boost is always present.

GM uses a twin scroll turbo. The twin scroll design gives the best turbo output for all-round operation while at the same time limiting turbo lag.

In effect, you have two turbos in one. You have the low speed boost response of a small diameter turbo yet you have the high volume boost output that you would normally find in a big diameter turbo.

Boost pressure is continually monitored and controlled by the computer and any excess boost pressure is dumped by computer controlled wastegate.

Think of it this way. If the turbo was not (always) producing adequate boost, and you jammed the throttle wide open, the engine manifold pressure would go very low, maybe into negative pressure. The engine would immediately bog down until the boost pressure rose to an adequate level. That is what's called turbo lag.
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post #5 of 16 (permalink) Old 07-22-2019, 11:23 AM
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Originally Posted by oldtux View Post
Thanks, imcrazy.

FWIW, why not look at the instant MPG readout? If you're on the turbo it should go low; otherwise much higher?
You will see it with the instant mpg drop and also with the oil pressure readout. cruising oil pressure on mine is about 32 psi, lean on the throttle and it climbs quickly. At WOT it nearly doubles to around 60psi I think (I don't do that very often).

2018 Chevy Equinox LT - Cajun Red, 1.5T FWD
2017 Chevy Sonic RS - Kinetic Blue - Killed in the line of duty, R.I.P.
1994 Ford Mustang GT - Opal Frost (good weather fun car)
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post #6 of 16 (permalink) Old 07-22-2019, 12:58 PM Thread Starter
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Thanks, spook for the info. The twin-scroll explains the quick response off the line, with even more go-power getting up to highway speed. Very different tip-in and response at speed from my 3 previous 2.4L NA engines. It'll take some getting used to. Oil pressure readout in the DIC? Haven't had an OP gage since my '53 Lincoln!
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post #7 of 16 (permalink) Old 07-22-2019, 02:16 PM Thread Starter
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silversn95, thanks for your info. Sadly, we lowly LT owners do not get the Uplevel DIC although I'm sure the software is locked away on some chip in the car. Hence, no oil pressure readout.
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post #8 of 16 (permalink) Old 07-22-2019, 04:07 PM
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Are you sure? I have it on my LT with the upgraded instruments but also on our work pool car which is an '18 LS with the standard instrument cluster. Doesn't look as pretty but the info is still there.

2018 Chevy Equinox LT - Cajun Red, 1.5T FWD
2017 Chevy Sonic RS - Kinetic Blue - Killed in the line of duty, R.I.P.
1994 Ford Mustang GT - Opal Frost (good weather fun car)
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post #9 of 16 (permalink) Old 07-22-2019, 04:32 PM
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Turbo At Last!

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Originally Posted by oldtux View Post
silversn95, thanks for your info. Sadly, we lowly LT owners do not get the Uplevel DIC although I'm sure the software is locked away on some chip in the car. Hence, no oil pressure readout.


you get the uplevel dic if you get the comfort and convenience package which includes the color dic, 8” radio and dual climate controls i believe, can’t remember what all it included when i ordered my 2018

the whole gage cluster is different so unfortunately for those that don’t have it there’s no way to “unlock “it


Sent from my iPhone using Tapatalk
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post #10 of 16 (permalink) Old 07-22-2019, 05:12 PM
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The oil pressure or the economy chart was not switched on by default on mine. You have to to the settings options (use left arrow on steering wheel to see that) in the DIC and select "info" (or something like that)...then you can check all the screens you want to see.

2018 equinox 1.6l Diesel LT, Hecho en Mexico, julio 2017
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