Next-Gen 2027 Chevy Silverado Prototype Spied Testing

[smit303]

On 8/14/2025 at 11:14 AM, revrnd said:

Im not sure if any of the braintrust realised that some people would be disappointed when the base V8 was reduced to a 5.3, probably not born when 327s were common. Likely never heard of 'bigger is better' either.

 

Only thing I can think of is to differentiate it from the 6.0 L which were never offered in the half tons.

 

My 2003 Silverado SS had a 6.0 L.

[revrnd]

13 hours ago, smit303 said:

My 2003 Silverado SS had a 6.0 L.

I remember us building them, but there wasn't much fanfare about them. I don't think there was any badging to denote the displacement.

[CamGTP]

Neither the SS or the GMC VHO trucks specifically said 6.0, just needed to know or research that they were the performance version of the half ton.

 

The vortex max trucks also had them, those stopped in like 2008 or 2009 I think.

[revrnd]

2 minutes ago, CamGTP said:

Neither the SS or the GMC VHO trucks specifically said 6.0, just needed to know or research that they were the performance version of the half ton.

 

The vortex max trucks also had them, those stopped in like 2008 or 2009 I think.

 

Just throwing it out there, but probably whenever the GMT800 model was phased out. We had retooled & were building GMT900s when our plant closure was announced in 2008.

[CamGTP]

Looks like the GMT-900's used the L76 engine until 2009 from what google told me.

 

So 2007.5-2009.

[revrnd]

3 minutes ago, CamGTP said:

Looks like the GMT-900's used the L76 engine until 2009 from what google told me.

 

So 2007.5-2009.

 

I do recall seeing the Vortec Max badging out on the street, but don't recall them in the plant. I was in the Body Shop where everything was bare metal LOL

[smit303]

The 6.0 was an LQ9. 345 hp. 

[newdude]

On 9/8/2025 at 1:12 PM, Chevy Big 10 said:

Is there any talk of these new engines being changed to DOHC instead of OHV with this new upcoming engine generation?

 

 

Would be interesting if it happens.  The Gemini small blocks (LT6/LT7 5.5 DOHC in the Corvette) sure would form the basis of such a move, albeit it would obviously end up with a cross plane crank and a lot less fancy upper end than the LT6/LT7. 

 

That said, GM has never made any mention of the Gemini engines as being a 6th generation small block, and that they are their own new ground up engines.  Thus leading me to believe they stay pushrod with the 6th generation.    

[newdude]

Off topic side note for those talking about 6.0s in 1500s.

 

Yes, they did.  Both GMT-800 and GMT-900.  

 

2003-2006 Silverado SS.  LQ9 345hp.

 

2001-2007 Sierra C3/Denali.  LQ4 in the C3, Denali got LQ9 325hp (early years) and 345hp (late years).

 

2006-2007 Silverado/Sierra VortecMAX.  LQ9 345hp.

 

2007-2009 GMT-900 VortecMAX L76 360hp.  

[redwngr]

IIRC, the L76, used in the 1500 was an aluminium block engine

 

The L96, used in HD's until recent change to LT8 was cast iron block

LT8 is cast iron block

[Epsilon Plus]

The talk of a DPF on gas will kill any hype about these things. They already took a major normie reliability hit from the 6.2 and DOD/DFM/AFM problems. Bringing the secret sauce that killed the reliability of the modern diesel to gas isn't going to help matters.

 

 

For all those hoping for a return to the "350" that I've seen in this thread, keep in mind 5.7L doesn't automatically mean "350 ci". The LS1 was a 5.7L with 346ci. The Toyota and RAM 5.7 is not 350 ci. The 5.3 is a 325ci not the "327" from yore.

 

In other nit picky news you may not know, the original Ford Mustang 5.0 was actually a 4.9 but didn't sound as cool in a Vanilla Ice song so they lied it up a notch. They made sure to make the Coyote a true 5.0.

 

I've always liked new stuff. Especially new GM stuff. However, the modern "gm" went down a path I'm struggling to follow. Replacing a bomb-proof L8T & 6L90 combo with a new & deproved super-emissions saddled Gen VI with a 10-speed likely on it's 5th valve body revision by then (just take the plastic check balls out and go back to what worked?) won't be in the cards.

[revrnd]

How much has the rebranding cost? I see all the parts packaging is the new 'gm' look. Imagine the reaction if Ford got rid of the blue oval & script logo?

[2016 Sierra Owner]

On 9/29/2025 at 7:15 PM, Epsilon Plus said:

The talk of a DPF on gas will kill any hype about these things. They already took a major normie reliability hit from the 6.2 and DOD/DFM/AFM problems. Bringing the secret sauce that killed the reliability of the modern diesel to gas isn't going to help matters.

 

 

For all those hoping for a return to the "350" that I've seen in this thread, keep in mind 5.7L doesn't automatically mean "350 ci". The LS1 was a 5.7L with 346ci. The Toyota and RAM 5.7 is not 350 ci. The 5.3 is a 325ci not the "327" from yore.

 

In other nit picky news you may not know, the original Ford Mustang 5.0 was actually a 4.9 but didn't sound as cool in a Vanilla Ice song so they lied it up a notch. They made sure to make the Coyote a true 5.0.

 

I've always liked new stuff. Especially new GM stuff. However, the modern "gm" went down a path I'm struggling to follow. Replacing a bomb-proof L8T & 6L90 combo with a new & deproved super-emissions saddled Gen VI with a 10-speed likely on it's 5th valve body revision by then (just take the plastic check balls out and go back to what worked?) won't be in the cards.

"What worked" was not making their after warranty bank account money go up any!

[newdude]

GPFs don't seem like the end of the world as they enable ICE engines to progress down the line.  Plus they seem to be more reliable than DPFs and diesel emissions systems.

 

Impact of Gasoline Particulate Filters on Fuel Economy | Chevron Lubricants (US)

 

Something You Need To Know About GPF and GPF Regeneration

 

Gasoline Particulate Filters

 

There are drawbacks though as with anything.  Plus engine oils get further enhanced to GF-7 so basically all oils turn to Euro spec low ash gas/diesel oils, which will increase costs a bit for oil changes.  

 

All I see here at the end of the day?  Perhaps the whole EV push was warranted to a degree.  The ball should stay rolling on EV though as it will further enhance battery tech and fast charge times to closer rival a gas stop fill time.  

 

Rimac Technology Unveils New Solid-State Battery Tech and Next-Generation e-Axles at IAA Mobility – Rimac Newsroom

 

This Groundbreaking Solid-State EV Battery Charges In Minutes

[Z45]

On 9/29/2025 at 7:15 PM, Epsilon Plus said:

The talk of a DPF on gas will kill any hype about these things. They already took a major normie reliability hit from the 6.2 and DOD/DFM/AFM problems. Bringing the secret sauce that killed the reliability of the modern diesel to gas isn't going to help matters.

 

 

For all those hoping for a return to the "350" that I've seen in this thread, keep in mind 5.7L doesn't automatically mean "350 ci". The LS1 was a 5.7L with 346ci. The Toyota and RAM 5.7 is not 350 ci. The 5.3 is a 325ci not the "327" from yore.

 

In other nit picky news you may not know, the original Ford Mustang 5.0 was actually a 4.9 but didn't sound as cool in a Vanilla Ice song so they lied it up a notch. They made sure to make the Coyote a true 5.0.

 

I've always liked new stuff. Especially new GM stuff. However, the modern "gm" went down a path I'm struggling to follow. Replacing a bomb-proof L8T & 6L90 combo with a new & deproved super-emissions saddled Gen VI with a 10-speed likely on it's 5th valve body revision by then (just take the plastic check balls out and go back to what worked?) won't be in the cards.

Going farther back, the 1970 Chevelle SS396 CID was actually 402* cid (396 over-bored). The SS396 moniker was so popular (1965-69), they were afraid to call it SS402 and lose sales/cred in performance venues. The 402 put in non-SS cars was marketed as  a 400 Turbo-Jet even though they also had a small block 400 Turbo-Fire available in many non-SS models. 

 

*Prior to 1970 GM corp would only let engines of 400cid (or more) in the Corvette and the big cars.  That's why all the muscle cars (less COPO) were under 400; 389 GTO, 396 Chevelle, Camaro etc.

Edited October 8, 2025 by Z45