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2007/8 Silverado Big Block?

c502cid

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c502cid Enthusiast

c502cid

Posted
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Considering all I'm hearing about the huge jump in price of the upcoming Duramax to meet the new emission regulations, there has to be some interest in the big block. Well, maybe I'm the only one. Anyone heard any info at all on the big block option for 2007/8?

ZZebes Senior Enthusiast

ZZebes

Posted
Posted

I heard the 8.1 will be toast on the GMT-900's since they don't offer them in the new 2500 Suburban

Chevy man 72 Enthusiast

Chevy man 72

Posted
Posted

the big block get very poor gas milage. so it will probable be history in the near future.

Trouttrooper Enthusiast

Trouttrooper

Posted
Posted
the big block get very poor gas milage. so it will probable be history in the near future.

 

 

 

 

My 8.1 gets about 12 mpg empty. Compared to my previous truck with the 6.0 at 15 mpg empty I wouldn't say that's much of a difference. Towing with the 8.1 drops down to 11 mpg. My old 6.0 would drop to around 7 mpg.

 

When I compare yearly average mpg between the two trucks (yes I keep a log of every fillup) my 8.1 actually gets better than my old 6.0. The big factor there though is I pretty much only use my truck when I need to haul something so the 6.0 was always working hard and getting crappy mileage.

C/K Man Enthusiast

C/K Man

Posted
Posted

Though the 8.1L is no longer available in the Suburban/Yukon XL and full size vans, from what I understand, it will still be available in the GMT-900 heavy duties and the Topkick/Kodiak big trucks.

  • 2 months later...
c502cid Enthusiast

c502cid

Posted
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Even though I still see no mention in any of the released GMT 900 info, I think I do have confirmation of the 8.1 in the new trucks. I was at my local GM dealer today picking up a Ram Jet 502 for my Blazer project (sorry just had to get that in, I'm a little excited about it!) and I asked them if they had heard anything yet. The parts and service director checked the computer and said he showed part numbers for the 8.1 engine in the 2007/8 GMT-900 program. So, with any luck, we'll see it and while it is wishful thinking, maybe a bump in HP and TQ too.

C/K Man Enthusiast

C/K Man

Posted
Posted

That's good news. I hope to buy a 3500 late next year with an 8.1L in it. I just don't drive my large pickups enough to justify a diesel, even at the prices they are going for now.

ChrisNJ Enthusiast

ChrisNJ

Posted
Posted

New here, but glad I found this thread. I have the same experience as trouttropper, I own both a 6.0 and an 8.1. with the difference of about 2mpg between them my wife and I fight to drive the 8.1L, not because of the mpg, but because it feels like an old muscle car, which we both love. I have driven a freinds dmax and it didn't impress me compared to the 8.1L. granted it's more powerful and a great engine in it's own right, but it's louder and I couldn't get used to the lack of engine braking. plus i'm only a part time tower of about 10K lbs, so i'd rather have the quieter engine for 340 days a year daily driver. plus, when towing the 8.1 is a pleasure compared to the 6.0. I need a new truck next year and was hoping to be able to get the 8,1L in it, now it appears I will be able to, yaaaahhhoooooo.

davefr Enthusiast

davefr

Posted
Posted

I'm also very anxious to find out the new HD engine lineup. I was leaning diesel but I expect it to be a $10k option with the new LMM Duramax and I'm not excited about all the new pollution controls. Besides that, diesel's about $.50/gallon higher then regular gas and reports suggest ULSD is making cost go even higher and MPG going lower.

 

I've heard that 8.1 is going away. I've also heard it may live on a few more years. I also heard that the 8.1 might be getting a power increase for '07. There have been rumors of a 8.3, a V10, and a supercharged 6.0.

 

Does anyone have any inside info on the new HD engine lineup. With production quickly approaching I can't believe the info is still so sketchy.

C/K Man Enthusiast

C/K Man

Posted
Posted

There was a report about 2 years ago that the V-10 had been dropped. I figure that's probably true, as there has been no news about an upcoming V-10 since.

c502cid Enthusiast

c502cid

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I'll do my best to nail down an answer from the GM guys at the SEMA show in about a month. This month Truck Trends magazine has a blurb about it but it seems like they are guessing too.

k3500CC8.1 Enthusiast

k3500CC8.1

Posted
Posted

Doesn't look good for the big block. If you want one, better order it now!!! The link to the press release below states that the engine choices for the new HD's will be the 6.0L or the Duramax. At least the diesel guys are getting 5 extra hp's for a few thousand more!!! It looks like the bean counters are going to force customers to drop close to 10K for the ability to pull a decent load with the new trucks. Tough times in the HD world for us GM guys.

 

 

 

http://media.gm.com/us/gm/en/news/press_ki...s/hd/index.html

davefr Enthusiast

davefr

Posted
Posted
Doesn't look good for the big block.  If you want one, better order it now!!!  The link to the press release below states that the engine choices for the new HD's will be the 6.0L or the Duramax.   At least the diesel guys are getting 5 extra hp's for a few thousand more!!!  It looks like the bean counters are going to force customers to drop close to 10K for the ability to pull a decent load with the new trucks.     Tough times in the HD world for us GM guys. 

 

 

 

http://media.gm.com/us/gm/en/news/pr.../hd/index.html

 

 

 

 

 

Thanks for the update but I'm pretty pissed. I really wanted a new HD w/8.1.

 

I wonder if 8.1 is truly EOL or if GM is just downplaying it since they want to push Duramax's and 6.0's. (they didn't mention it but they didn't say it was discontinued either)

c502cid Enthusiast

c502cid

Posted
  • Author
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Hate to say this but I emailed one of the people at the end of the press release. She just replied and told me, no 8.1, just the 6.0 and the Duramax. See below.

 

 

Thanks for your inquiry Vern. The new heavy duty Silverado and Sierra will not have the 8.1L gas engine. They are standard with the 6.0L V8 - 353 hp and 373 lb-ft. Optional engine is Duramax Diesel - 365 hp and 660 lb-ft.

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