GM's 6th Gen V8 ! What would you like to see?

Gangly · September 12, 2024

4 minutes ago, newdude said:

I "think" what Scatha's angle with the Toyota TT engine isn't quite what he's aiming for.

Toyota's recall hits on a known manufacturing defect, which has nothing to do with it being a small displacement twin turbo V8 replacement, which would be the EPA argument side of V8s are a dying breed to an extent and are being replaced with turbo or twin turbo powerplants. But the "reliability" aspect, these Toyota engines aren't failing because of being a 3.4 V6 with two turbos, they are failing because of manufacturing. Just like the 6.2s from GM for 2022-2024 are, as are the 5.3s they just recalled in 2024s, manufacturing issues.

Also, at the end of the day, NEITHER engine should be having failures at low mileage, no matter the engine design.

I agree.

I am well versed with the Toyota issue, I just couldn't see the correlation between the argument and the statement used to support the argument. I understand if the statement was made to outline an alternative to larger displacement gasoline engines, but the reliability of the TT V6 engine has nothing to do with CAFE requirements.

I kind of look at the pushrod V8 in the same light as older diesel engines. They are uncomplicated, simple to work on, and reliable (for the most part) which should keep them around for the foreseeable future.

Gangly · September 12, 2024

54 minutes ago, newdude said:

"as are the 5.3s they just recalled in 2024s, manufacturing issues."

I hadn't seen or heard of this, what's the issue?

Edited September 12, 2024 by Gangly

ScathaTheWorm · September 12, 2024

57 minutes ago, newdude said:

Nitpicking but GM debuted AFM (DOD at the time was the name) in 2005. GMC Envoy Denali was the first application.

The Trailblazer had it that time as well. The 5.3L V8 especially. Only engine that did not get it was the Atlas I6.

To be fair, I have not heard about widespread failures of the AFM/DFM here in Qatar aside from very isolated cases...and the trucks we get also have the system on them. Only one 6.2 case recently due to main bearing issues....

Edited September 12, 2024 by ScathaTheWorm

ScathaTheWorm · September 12, 2024

14 minutes ago, Gangly said:

I agree.

I am well versed with the Toyota issue, I just couldn't see the correlation between the argument and the statement used to support the argument. I understand if the statement was made to outline an alternative to larger displacement gasoline engines, but the reliability of the TT V6 engine has nothing to do with CAFE requirements.

I kind of look at the pushrod V8 in the same light as older diesel engines. They are uncomplicated, simple to work on, and reliable (for the most part) which should keep them around for the foreseeable future.

I fully agree with regards to the pushrod engines.

My point, is that with regards to the Toyota, being a twin turbo engine that REQUIRES cab off access and turboes being at the very back...does not make it very user friendly if you like to work on it yourself.....

I did drive a 2019 Land Cruiser GXR V8 as a rental and the engine almost took up the entire space...We get the 4.6L V8 as well...that was what I had.

ScathaTheWorm · September 12, 2024

30 minutes ago, newdude said:

I "think" what Scatha's angle with the Toyota TT engine isn't quite what he's aiming for.

Toyota's recall hits on a known manufacturing defect, which has nothing to do with it being a small displacement twin turbo V8 replacement, which would be the EPA argument side of V8s are a dying breed to an extent and are being replaced with turbo or twin turbo powerplants. But the "reliability" aspect, these Toyota engines aren't failing because of being a 3.4 V6 with two turbos, they are failing because of manufacturing. Just like the 6.2s from GM for 2022-2024 are, as are the 5.3s they just recalled in 2024s, manufacturing issues.

Also, at the end of the day, NEITHER engine should be having failures at low mileage, no matter the engine design.

I do agree.

I recently saw one case a an MY24 Tahoe 6.2 that failed a 320 miles...but I DO NOT know if it its true or not, or whether it had some issues prior to being bought that caused the failure...

Build dates of the 6.2s that are failing would be a good start, as we know the issue started from MY22.5 and continues to MY24 models (not sure if the dealers have early MY24s on their lots made in late 2023..or MY24s made in January)....I have heard also they AGAIN had a supplier change and a new part number.

Brian O. · February 23

I would like to see a V8 that comes out on TOP for a change. It's been so long we have had to go home with our tail between our legs when it comes to a high performance truck like a trx/raptorR etc. GM has done a great job on the turbocharged 3.0 Duramax LZ0 for performance with fuel economy. If GM wants to turbocharge a V8 they need to not end up with something like a 3.5 eb, good till you put it to work and it sucks fuel. I think GM need to make about 3 versions of this engine, mild, medium and extreme all fuel efficient which makes Sales!

No. 1 build it with parts that stand up like 25+ years ago.

newdude · February 23

3 minutes ago, Brian O. said:

I would like to see a V8 that comes out on TOP for a change. It's been so long we have had to go home with our tail between our legs when it comes to a high performance truck like a trx/raptorR etc. GM has done a great job on the turbocharged 3.0 Duramax LZ0 for performance with fuel economy. If GM wants to turbocharge a V8 they need to not end up with something like a 3.5 eb, good till you put it to work and it sucks fuel. I think GM need to make about 3 versions of this engine, mild, medium and extreme all fuel efficient which makes Sales!

No. 1 build it with parts that stand up like 25+ years ago.

At this rate we should be lucky GM even invested in another V8 generation because of EPA and CARB regulations.

KARNUT · February 23

I’m not interested in tuned exhaust anymore. My only V-8 is my Avalanche. It’s the slowest of the five I have currently. My wife’s 2011 Genesis V-6 will out perform my brothers 2010 V-8 challenger while getting better fuel mileage. I think the V-8 is going away.

PunchT37 · February 23

A certain somebody is rolling back the stone of regulations. Maybe the V-8 is still great?

johnnyquick · February 24

Grow the balls to put the 2019 ZR-1 engine in a pickup, like they did with the Escalade V those engines kick ass and last.

Who really gives a damn about economy when buying a truck, if you are broke then buy a brokey car.....LOL

Seriously though of you get 12-19 mpg is it much different than getting 19-23 in the real world? I am saying city/hwy for each etc... people are sqaucking about fuel economy in a world with $4 eggs and houses that start at $400k where are you "saving" money?

Edited February 24 by johnnyquick

carkhz316 · February 24

6 hours ago, johnnyquick said:

Grow the balls to put the 2019 ZR-1 engine in a pickup, like they did with the Escalade V those engines kick ass and last.

Who really gives a damn about economy when buying a truck, if you are broke then buy a brokey car.....LOL

Seriously though of you get 12-19 mpg is it much different than getting 19-23 in the real world? I am saying city/hwy for each etc... people are sqaucking about fuel economy in a world with $4 eggs and houses that start at $400k where are you "saving" money?

For real. Its been the Ford F150 Raptor, then the Ram TRX and GM......................

Crickets. Just sitting on their hands. The Reaper sucks and looks like it has a physical deformity.

Transient · March 20

On 2/24/2025 at 11:06 AM, johnnyquick said:

Grow the balls to put the 2019 ZR-1 engine in a pickup, like they did with the Escalade V those engines kick ass and last.

Who really gives a damn about economy when buying a truck, if you are broke then buy a brokey car.....LOL

Seriously though of you get 12-19 mpg is it much different than getting 19-23 in the real world? I am saying city/hwy for each etc... people are sqaucking about fuel economy in a world with $4 eggs and houses that start at $400k where are you "saving" money?

Where's this deal on eggs? I went to the commissary and 18 ct eggs were $9.

Transient · March 20

I'm going to start the crazy train. Unfortunately, it's rooted in GM history. Whatever the Corvette got the trucks got, but detuned for less horsepower and torque so the torque would come on stronger. 99% of parts comes from the parts bin. Therefore, here's what I am guessing will happen.

2.7 turbo 4 with 8-speed

It's the base engine and replaces the 5.3

3.0 Duramax with 10-speed

Stays! Maybe GM makes a few tweaks to make it marginally better.

6.2 with 10-speed

Yes, it's the same block as the 5.3, but it commands a $2,500 premium. GM lives profit and profitability. No increase in power output, and that means this engine is no longer the top selection in the order guide.

5.5 flat plane with 10-speed

GM needs a 500 bhp engine. The 10-speed demonstrated it can handle the power output on the Camaro ZL1. Can you imagine the exhaust sound? I can't because GM will muffle it with baffles. It will be slightly detuned for decreased bhp and btq so it doesn't rain on the Corvette Z06's parade. Engine would be tuned for lower peak torque value. Smaller displacement may mean lighter weight truck, which means improved mpg. And, if you want forced induction it's available, but you gotta do it yourself just like how people are currently mounting the supercharger from the LT4 onto the 6.2 in the Silverado. Twin turbos and 1,000+ horsepower!

Wishful dreaming

A hybrid. GM has played in this arena before, but bailed right before bankruptcy. Ford nailed it with their hybrid F150, imo. I think it's called Powerboost. Due to the tiny gas tank on the current V8 gassers I could see that remaining space on the drivers underside filled with batteries. I'm not talking something like the Toyota Tundra hybrid system that's not really about extending range. Look to Ford and make it comparable/better.

How that for crazy?

I don't see GM installing the 6.6 gasser in the 1500s. Iirc, it's a heavier cast iron block instead of aluminum. Sure, the block can handle 1,000 bhp, but it's pointless for a truck where mpg matters to the consumer. Lighter is better.

Edited March 20 by Transient

64BAwagon · March 20

The 1500 lineup will be 2.7 turbomax, 3.0 Baby Duramax, 5.7L unknown details and a 6.6L unknown details. I dont have any info on the 5.7 or 6.6 other than they will both have some form of AFM and cylinder deactivation and EGR's with potentially a gasoline particulate filter. I dont know if the 6.6 will be a derivative of the L8T from the HD trucks.

Srode1 · March 20

I have 3 things I would like to see from the next gen

1. Reliability and / or 200,000 mile drive train warranty for engine and transmission

2. Reliability and/or 200,000 mile drive train warranty for engine and transmission
3. Reliability and/or 200,000 mile drive train warranty for engine and transmission

These trucks have a lot going for them in new features BUT - there is zero chance of me buying a new or used 19-25 GM full sized truck right now because of the Engine / Transmission problems and I'm in the market for a new/different truck.

I have a friend who is good friends with an older experienced GM Engineer who is about to retire. My friend told me his advice is don't buy the 19-current trucks, they have too many design issues due to a huge loss of talent in GM's Engineering group prior to the release of this newer drivetrain.

I'm currently looking for a 17/18 6.2 short bed with max tow package low mileage to give me 10 years of service. The AFM might give me problems me but the chances are much lower than the newest DOD system failures, and I can deal with clunky shifting once in a while in the 8 speed.