2027 Silverado Leaks: 1,000-Mile Range Target and return of the 5.7L V8

[Zane]

 

Following up on the dealer reveal article from earlier this month, we were passed some details that dealers heard at their annual meeting a few weeks ago. 

 

I want to preface this by saying this is still unconfirmed, spotty intel.  BUT... Here is the breakdown of what we are hearing:

• The 6.7L Rumor now seems unlikely: The gas engine lineup was confirmed to be a 5.7L and a 6.6L V8. No power figures yet, but it looks like Chevy is bringing back the iconic 350-cubic-inch displacement.

• 1,000-Mile Range Duramax: A surprise detail- GM is targeting a staggering 1,000-mile driving range on a single tank for the light-duty 3.0L Duramax. What would that take to pull off?

I just published a full breakdown on the front page with a deeper dive into the fuel capacity math here:
https://www.gm-trucks.com/2027-chevy-silverado-leaks-5-7l-v8-1000-mile-range/

 

What does everyone think?

[Tim R Esterdahl]

I think you are right with the 36-gallon tank. I see it as an option and not the standard. Just bragging rights for advertising to put out there.

[johnnyquick]

I say forget the cute and fun stuff like longer ranges and try and build engines that stay together.

[Coastie05]

1,000 mile range is insane! That would be phenomenal.

[KARNUT]

I had an 100 gal fuel tank in the bed with my diesel trucks. I could go forever except when I was pulling my tractor. Going long distances is great except when you have to pee. So you have to stop anyway. I usually toped off with fuel while I was there. Stretch my legs. 

[James Brock]

Loved my Square body’s with dual tanks. Then switched to Suburbans with 40 gallon tank. Almost cried when I bought my 08 and they didn’t offer the bigger tanks. We all don’t use our trucks for school kids and grocery shopping 

[Mags11]

I have a 2021, 3.0 diesel and I love it.

I have 212,000 miles on it and it drives like it is brand new.

I would very much be interested in the 36 gallon tank.

[StingerZ16]

If i could, I would do a 35 gal tank on my 2025.

With 1000 mile range, I can pick where i get fuel and where i stop to stretch.

[Jsdirt]

All looks fantastic on paper, as they usually do! If they offered that engine to the aftermarket alongside the new truck, that would be fantastic, too. 

 

The bigger question is, can GM build this thing and make it RELIABLE? Based on their past 19 model year track record, I have serious doubts.

 

Side note - I have a '93 Ram W250 with a Cummins that has a 1,600+ mile range. The stock 30 gallon tank, plus I've got a small toolbox that is mostly fuel - 91 gallons to be exact.

 

1,600 is as far as I dare go. Theoretically I should be able to go 1,900 before it stops running.

Edited March 26 by Jsdirt

[sk]

The 6.7L might not be a rumor.  GM has a new design ready for production (which started at 6.6L) that could possibly be modified and used in the light-duty trucks:

 

https://news.gm.com/home.detail.html/Pages/topic/us/en/2026/mar/0326-Deep-dive-2027-Chevrolet-Corvettes-next-generation-V8.html

Edited March 26 by sk