6.0-liter diesel

ChasSidwa · January 12, 2006

I just read in Autoweek about the Tahoe being available with a 6 liter Diesel. Anyone know anything more about this.

"The 5.3-liter V8 was the only power choice we had on our daylong drive, but it lacked for nothing. If anyone says he can tell when four of those eight cylinders deactivate, he’s lying. With 320 hp and 335 lb-ft of torque, we never wanted for more power. A 4.8-liter V8 and a 6.0-liter diesel will be available later."

http://www.autoweek.com/apps/pbcs.dll/arti.../THISWEEKSISSUE

Machine · January 12, 2006

I just read in Autoweek about the Tahoe being available with a 6 liter Diesel. Anyone know anything more about this.

"The 5.3-liter V8 was the only power choice we had on our daylong drive, but it lacked for nothing. If anyone says he can tell when four of those eight cylinders deactivate, he’s lying. With 320 hp and 335 lb-ft of torque, we never wanted for more power. A 4.8-liter V8 and a 6.0-liter diesel will be available later."

http://www.autoweek.com/apps/pbcs.dll/arti.../THISWEEKSISSUE

<{POST_SNAPBACK}>

This is the first time anyone has come out and said that. Most likely a reporting error unless they plan to put a 6.0L Power Stroke in it because the DMAX is a 6.6L. I bet they meant 6.0L Gas - which in different versions of this SUV would be true.

Thanks for sharing.

Larry · January 12, 2006

I bet they meant 6.0L Gas - which in this SUV would be true.

Yep, that is what happens when you have nontechnical journalism majors writing articles in an automotive rag.

ZZebes · January 12, 2006

Its not the 6.0l Gas its the 6.2L gas, it is an all new motor with soething like 400 bhp and 400 lbft with active cylinder

Machine · January 12, 2006

Its not the 6.0l Gas its the 6.2L gas, it is an all new motor with soething like 400 bhp and 400 lbft with active cylinder

<{POST_SNAPBACK}>

It's actually both - 6.0L and 6.2L, but the report is talking about the 6.0.

zippy · January 12, 2006

I just read in Autoweek about the Tahoe being available with a 6 liter Diesel. Anyone know anything more about this.

"The 5.3-liter V8 was the only power choice we had on our daylong drive, but it lacked for nothing. If anyone says he can tell when four of those eight cylinders deactivate, he’s lying. With 320 hp and 335 lb-ft of torque, we never wanted for more power. A 4.8-liter V8 and a 6.0-liter diesel will be available later."

http://www.autoweek.com/apps/pbcs.dll/arti.../THISWEEKSISSUE

<{POST_SNAPBACK}>

This is the first time anyone has come out and said that. Most likely a reporting error unless they plan to put a 6.0L Power Stroke in it because the DMAX is a 6.6L. I bet they meant 6.0L Gas - which in different versions of this SUV would be true.

Thanks for sharing.

<{POST_SNAPBACK}>

i haven't flipped through the article yet, but you are aware that the manufacture has the ability to cut down the engine size...

Machine · January 13, 2006

I just read in Autoweek about the Tahoe being available with a 6 liter Diesel. Anyone know anything more about this.

"The 5.3-liter V8 was the only power choice we had on our daylong drive, but it lacked for nothing. If anyone says he can tell when four of those eight cylinders deactivate, he’s lying. With 320 hp and 335 lb-ft of torque, we never wanted for more power. A 4.8-liter V8 and a 6.0-liter diesel will be available later."

http://www.autoweek.com/apps/pbcs.dll/arti.../THISWEEKSISSUE

<{POST_SNAPBACK}>

This is the first time anyone has come out and said that. Most likely a reporting error unless they plan to put a 6.0L Power Stroke in it because the DMAX is a 6.6L. I bet they meant 6.0L Gas - which in different versions of this SUV would be true.

Thanks for sharing.

<{POST_SNAPBACK}>

i haven't flipped through the article yet, but you are aware that the manufacture has the ability to cut down the engine size...

<{POST_SNAPBACK}>

Michael,

Nice to meet you.

The magnitude of a redesign of an Isuzu /GM diesel platform takes more engineering than any revamp of a gasser. GM’s installment of a freshly designed diesel in a new generation of Tahoe makes zero sense. The EPA 2007-08 standards already have GM working on tweaking the 6.6 Duramax to meet regulations – do you think they would introduce a new 6.0 diesel at this pinnacle point? Would their business model include such a revamp to increase sales – before the launch of a newly designed truck platform? Imagine the buzz this would have on the forums that solely discuss the Duramax – yet, other than this article, no mention has been made of this technological introduction on any diesel site that I know of / post to.

I could go on and on, but you don’t need to read the entire article to easily conclude that the author was referring to a 6.0 gas engine.

Hopefully I am wrong about all of this. I would love a diesel option on a GM SUV…but logic and research tells me a diesel option isn’t on the radar for this platform.

C/K Man · January 14, 2006

I have heard rumors of a V-6 Duramax, based on the 6.6L, for the Tahoe/Yukon.

DMAX Daddy · January 14, 2006

Problem is 360HP in the V8 Translates to 270 in a V6. With 350ish HP Gas engines available, that would be hard to select.

If they came out with a diesel though I would probably get it. I think the D/A combo in a Suburban/Tahoe would sell some units, if they got the Allison to fit.

Truthfully an nice 350HP Gas engine with the Allison would be sweet as well.

ChasSidwa · January 17, 2006

Here is an update from Mark Vaughn who wrote the Autoweek article. This came to me via email. Darn, no diesel yet.

Mark Vaughn said:

Thanks for pointing it out. Here's what GM says about engines for the GMT900s:

The Gen IV Vortec V-8 truck engines are built in a variety displacement and power combinations, including versions with aluminum cylinder blocks. All engines share a basic architecture that includes 4.400-inch bore centers * the same design foundation on which the original small-block V-8 was developed in the early 1950s. Initial Gen IV engine offerings include:

4.8L iron block (RPO LY2), rated at 290 horsepower (216 kw)*

5.3L iron block (RPO LY5) with Displacement On Demand technology, rated at 320 horsepower (238 kw)* * including E85-capable version (RPO LMG)

5.3L aluminum block (RPO LC9) with Displacement On Demand technology and E85 capability, rated at 320 horsepower (238 kw)*

6.0L iron block (LY6) heavy-duty engine with variable valve timing, rated at 350 horsepower (261 kw)*

6.0L aluminum block (L76) with Displacement On Demand technology and variable valve timing, rated at 355 horsepower (264 kw)*

6.2L aluminum block (L92) with variable valve timing, capable of 380 to 400 horsepower (283 to 298 kw)*

You'd think there will almost have to be a diesel for the pickup trucks later on but no mention yet on a Tahoe diesel.

zippy · January 18, 2006

in a previous discussion on future powertrain options we were informed that a diesel for the suburban/tahoe platform was being tested. they wouldn't give any specifications based on power output or even size, but simply that it made less torque so as to not require the allison trans and have a higher rpm powerband. the D.O.D. now called Active Fuel Managment Technology isn't going to save them from the cafe standard which keeps going up. that also doesn't do anything for the group that is requesting diesels in their larger S.U.V.'s. going by that, a smaller displacement version of the duramax does make sense.

biochemist · January 18, 2006

Correct, my brother works for allisons and tells me they are working on a allison coupled to a DMax (down rated a bit) for the suburbans and hoes...it is just the way the 1500 series sits on the frame, they have to do some design changes so everything fits. He has seen it! Later,

Machine · January 19, 2006

in a previous discussion on future powertrain options we were informed that a diesel for the suburban/tahoe platform was being tested. they wouldn't give any specifications based on power output or even size, but simply that it made less torque so as to not require the allison trans and have a higher rpm powerband. the D.O.D. now called Active Fuel Managment Technology isn't going to save them from the cafe standard which keeps going up. that also doesn't do anything for the group that is requesting diesels in their larger S.U.V.'s. going by that, a smaller displacement version of the duramax does make sense.

<{POST_SNAPBACK}>

Indeed, a diesel option makes perfect sense to me in a Suburban. I would buy two, and ditch my gassers in a heartbeat.

If a diesel Sub / Tahoe is in the works then GM is doing an incredible job of keeping it under wraps. Regardless of anyone’s opinion on the validity of this new engine / addition to the SUV platform, the original point was that the author in the article posted above made a mistake in saying that 6.0 diesel was going to be a future option - this error has been confirmed by the online publication.

Biochemist seems to have the inside track at Allison…Regular, 6.6L detuned Dmax? That would be too cool. Any idea on a possible launch of any diesel option for this platform?