2.7 Turbo 4 Fan Club

kc classic · July 13, 2020

I have a 2019 GMC sierra 2.7. This morning after starting it up I put it in drive and took off down the road slowly. As I increased the speed up to about 20 mph (congested lake area) there was a loud noise as if the fan was blowing full speed. I shut off everything that would make noise as I slowly drove on.

I pulled off to the side of the road and shut down the engine. I can only assume the blower for the turbo continued to run for awhile.

I started the truck back up and it ran fine, but the engine light stayed on. When I got home I started it up a few times and the engine light stays on.

Any ideas as to went wrong?

Dealer is an hour away.

Mike Borowski · August 20, 2020

Spent a few bucks on eBay for some engine dress up.

heymrdjCW · September 22, 2020

2.7 must be doing well in real world usage. I’m sure GM was conservative at first with the rating after watching Ford have the issue of using too large of a CAC that performed too well and caused condensation issues on early EcoBoost trucks. Now GM sees they did actually create enough cooling capacity for towing heavy. 2.7 keeps looking better!

https://www.gm-trucks.com/2021-silverados-2-7l-3-0l-engines-get-price-drop-trailering-capacity-increase/

ScipElevation · September 22, 2020

6 hours ago, heymrdjCW said:

2.7 must be doing well in real world usage. I’m sure GM was conservative at first with the rating after watching Ford have the issue of using too large of a CAC that performed too well and caused condensation issues on early EcoBoost trucks. Now GM sees they did actually create enough cooling capacity for towing heavy. 2.7 keeps looking better!

https://www.gm-trucks.com/2021-silverados-2-7l-3-0l-engines-get-price-drop-trailering-capacity-increase/

Do you think that will apply to the 2019 and 2020 or Just new 2021's?

heymrdjCW · September 22, 2020

Do you think that will apply to the 2019 and 2020 or Just new 2021's?

While they can’t go back and do the truck’s stickers, I would imagine from just a powertrain standpoint, it works for 2019/20 as well. It doesn’t seem that any hardware changed, they just re-certified. That doesn’t mean there isn’t possibly different engine tuning that keeps the 2.7 from blowing a piston out of the block as it runs at Max capacity in Death Valley. Engine tune changes don’t really get published much year after year.

shanic18 · October 17, 2020

On 7/14/2019 at 10:39 AM, Ion said:

I actually wanted a turbo 4 Silverado, but there weren't any within 300 miles of me. So I went with the 5.3L V8. Fuel economy is fine for what it is. I'm averaging 24mpg highway and about 18mpg city. But I definitely miss the turbo bov noise from my Cruze.

shanic18 · October 17, 2020

best sound in the world.

2020 Silverado 2.7 turbo BOV Adapter

newdude · October 17, 2020

I've got a question for the 2.7 folks here.

Anyone try running 91/93 octane long term? Any fuel mileage comparisons 87 vs 91/93? I know GM set this engine up to run 87, but Cadillac AT4-V's hot version of this engine call for 93 octane as it makes 325hp and 381tq.

CamGTP · October 17, 2020

I want a video longer than 9 seconds on the BOV noise.

the wanderer · October 19, 2020

On 10/17/2020 at 12:01 PM, CamGTP said:

I want a video longer than 9 seconds on the BOV noise.

Really?? That was long enough to know I'd never want a truck that sounded as shitty as a teenager's ricer.

CamGTP · October 19, 2020

Then I guess all turbo trucks are ricer trucks.

heymrdjCW · October 19, 2020

Can’t really see being bothered by modern turbo truck exhaust sounds when all modern high revving V8 trucks sound like they skipped leg day at the gym. You know the ones, 6” lift on bro dozer tires and they goose it, make a ****** ton of noise and go nowhere as it has to kick down 4 gears first. Had one try to close a merge gap on me this weekend, and while he’s making all a racket and his 5.3L is screaming, the 2.0T Terrain easily gapped him and you hardly heard it do it. I was at 100% torque before he even dropped down enough gears.

If your truck isn’t pushing a minimum of 5 second 0-60, it’s embarrassing to make all that noise and get passed by a stock turbo vehicle.

Mike Borowski · October 19, 2020

5 minutes ago, heymrdjCW said:

Can’t really see being bothered by modern turbo truck exhaust sounds when all modern high revving V8 trucks sound like they skipped leg day at the gym. You know the ones, 6” lift on bro dozer tires and they goose it, make a ****** ton of noise and go nowhere as it has to kick down 4 gears first. Had one try to close a merge gap on me this weekend, and while he’s making all a racket and his 5.3L is screaming, the 2.0T Terrain easily gapped him and you hardly heard it do it. I was at 100% torque before he even dropped down enough gears.

If your truck isn’t pushing a minimum of 5 second 0-60, it’s embarrassing to make all that noise and get passed by a stock turbo vehicle.

Amen. Not all of us want to be stereotyped as the typical truck douche. The 2.7 is more fun to drive than the 5.3 IMO.

heymrdjCW · October 20, 2020

Amen. Not all of us want to be stereotyped as the typical truck douche. The 2.7 is more fun to drive than the 5.3 IMO.

Yep, having now test drove a 2020 with a 5.3, a 6.2, a 2.7, and the 3.0, the 2.7 is the fun to drive. If I were to buy another Denali, I’d get a 6.2. But GMC just isn’t doing it for me value wise. I think if it’s another splurge pickup I’d do a Ford or RAM first. I wouldn’t get another 5.3. Didn’t see the 2020 as much better than my2017 5.3, it’s a high strung V8 that makes a lot of noise before it makes power. Since we’re thinking of getting an SQ5 for the family hauler to replace the 2019 Terrain Denali in another year or two, and I like the cut of the GMC models, I’ll probably get a mid range 2.7 model to enjoy that low end torque that I’ve come to expect due to my other turbo vehicles and my brother’s Model 3 Performance that I frequent. 3.0 is a little tempting just for the novelty of it. I am looking to see if the Colorado gets the 2.7 as rumored.

22_AT4 · October 20, 2020

Saturday traveling around 50 MPH the speedometer dropped to 0, winded back up to speed travelling and the engine revved high, switched to N , then Drive and no other issues. Monday I was cruising at 80MPH on interstate, engine revvs high and I loose acceleration check engine light engages. Switch to neutral, engine revvs down. Switch to Drive, didn't feel it go into gear, "D" starts to flash, press accelerator, no response and the engine doesn't rev. Coasted to the nearest exit and parked. Shifted to drive and nothing. Turned off/started. Shifted to Drive, felt transmission engage. Eased off and it only went into the first few gears (8 speed prob 3rd) whining at 30MPH. Turned off/started again and check engine light stayed on with no issues driving. Took it to dealer and they were unable to get a reading from it. There were no loaners available (yesterday) so I dropped it off this morning (check engine light off, ran normal). Waiting on call back...

2019 Crew Cab 2.7 2WD 8 Speed trans