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View Full Version : Chevy brings the 8.1 BACK!!!


Oakleaf landscape
05-19-2011, 10:05 PM
My buddy picked up a new 2500 HD with the 8.1 in it. Bad ass motor. It's not on there website yet. Just to let you guys know.

ConstSvcs
05-19-2011, 11:12 PM
My buddy picked up a new 2500 HD with the 8.1 in it. Bad ass motor. It's not on there website yet. Just to let you guys know.

Yep............plenty of power! Too bad it uses 5w30 oil! GM states that acceptable oil consumption of the 8.1L is up to 1 qt per 1000 miles under heavy use (towing......etc)

How do I know this................I own one.......and it does.....and GM issued a letter to me thru my dealer regarding the oil consumption.

My 03 2500HD currently has 167,000 miles on it. Runs very well.........but uses its share of black gold ! I think its BS. I wish waited for the Duramax ! Since the 8.1 comes with the same Alison tranny and chassis setup.
:gmctruck:

Oakleaf landscape
05-19-2011, 11:29 PM
Yea but the 8.1 A LOT cheaper...

White Gardens
05-20-2011, 12:05 AM
That's Awesome!

I love the 8.1 in my 01 3500HD. Has the 4l80E behind it though, but so far it's been a great truck and tranny combo.

Yes, does consume some oil. I'm at less than half a quart every 1000 miles though.

Another thing that sucks is the lifter chatter at startup. My 4.3 in my s-10 does the same thing. Doesn't take long for it to go away also.

ConstSvcs- You can put 10w30 in the 8.1 down to -15*F if I recall. After that then they say to use the 5w30.

THEGOLDPRO
05-20-2011, 12:06 AM
Sweet!!!!!

BlackBirdWS.6
05-20-2011, 12:43 AM
Man would I love to have an 8.1l, I might have to trade up.

dbear
05-20-2011, 08:17 AM
Do you or your buddy have an external source? I just checked out both the Chevy (http://www.chevrolet.com/silverado-pickups/) and GMC (http://www.gmc.com/) websites. For 2011, the only engines offered are the 6.0 Vortec gas, and the 6.6 Duramax diesel.

I also googled "GM brings back 8.1" and got no current information to confirm.

White Gardens
05-20-2011, 08:17 AM
I think the greatest thing about the 8.1 is it's an industrial/marine motor to begin with.

From all my research and looking around, I haven't found anyone who has blown or trashed an 8.1.

buttaluv
05-20-2011, 08:54 AM
just bought a 01...pulls like no other, especially out of a gas station! ha ha

ACC_INC.
05-20-2011, 09:09 AM
10 mpg and it drinks a quart of oil every third fill up??? How is this remotly economical? Don't get me wrong, I love big HP, but I don't like throwing money away. Does the burnt oil leave deposits all over the motor? Where does all the ash go? (Ash is a metal partical in oil, it is not found in 2 cycle oil, which is why 2 cycle can burn oil, not 4 cycle) It seems like a poor design to me.

Please educate.
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dbear
05-20-2011, 12:09 PM
If anybody's interested, apparently the Chev/GMC websites are not current. It seems the 8.1 is indeed available on the 2012 trucks, as is an available 6-speed manual transmission:

"The 2012 GMC Sierra 2500 HD Crew Cab offers a transmission complete with a high-capacity six-speed ZF S6-650 manual is standard with Vortec 8100 or DURAMAX 6.6-liter turbo diesel engines...Both the short and long box 2012 GMC Sierra 2500 HD Crew Cabs come with a standard Vortec 6000 V8 (standard) with 300 horsepower engine.

Optional engines on both models: Vortec 8100 V8 (available) with 340 horsepower, DURAMAX™ 6600 Turbo Diesel V8 (available) with 300 horsepower engine."
Truck Resources GMC 2500 info (http://www.truckresources.com/2003-GMC-Sierra-2500-HD-Crew-Cab.html)

"The all new 2012 Sierra 3500 Truck is loaded with powerful Vortec engine
( Vortec 6.0L V8, Vortec 8.1L V8, and the DURAMAX 6.6L Turbo Diesel). A maximum towing capacity of up to 15,400 lbs and an available Allison 1000 series five-speed automatic transmission...The transmission in the new 2012 GMC Sierra 3500 is a high-capacity six-speed ZF S6-650 manual is standard with Vortec 8100 or DURAMAX 6.6-liter turbo diesel engines..."
Truck Resources GMC 3500 info (http://www.truckresources.com/2003-GMC-Sierra-3500.html)

gob71
05-20-2011, 01:52 PM
This is good news. I have owned dozens of the Suburban 2500's with 8.1's and 2500HD's. They all used oil, but not too bad. The gas mileage was not that much worse than the 6.0 versions, but the power and low end torque were 100x better.....They are great engines that will last along time.

buttaluv
05-20-2011, 02:15 PM
This is good news. I have owned dozens of the Suburban 2500's with 8.1's and 2500HD's. They all used oil, but not too bad. The gas mileage was not that much worse than the 6.0 versions, but the power and low end torque were 100x better.....They are great engines that will last along time.

man your not kidding...I'm pretty sure that thing would pull itself in half before it give up...

deerewashed
05-20-2011, 03:06 PM
unless you pull 20,000 pounds and dont have a diesel station near you dont get it. I have one and am going to sell it right after i am done with all my installs

deerewashed
05-20-2011, 03:09 PM
its an 02 ext cab short bed. Gas blows if you drive 3 hours of backroads everyday from march till june going to and fro nurseries

THEGOLDPRO
05-20-2011, 06:37 PM
unless you pull 20,000 pounds and dont have a diesel station near you dont get it. I have one and am going to sell it right after i am done with all my installs

How much you looking to sell it for?? And do you have any pics of it?

Z-master man
05-20-2011, 08:49 PM
its an 02 ext cab short bed. Gas blows if you drive 3 hours of backroads everyday from march till june going to and fro nurseries

Dont expect much better out of a 6.0 new or old. My parents/I have an 09 2500Hd 6.0 and it averages 12 around town, and thats not with a heavy foot or towing.

meets1
05-20-2011, 11:08 PM
that is good news. Boys its not about your likes and dislikes of the 8.1 It comes down to FORD and DODGE. What are they offering. How can I up the ante on that. And when the new platform comes out in 1-3 yrs gm needs all there ducks in a row.

mowerbrad
05-20-2011, 11:22 PM
If anybody's interested, apparently the Chev/GMC websites are not current. It seems the 8.1 is indeed available on the 2012 trucks, as is an available 6-speed manual transmission:

"The 2012 GMC Sierra 2500 HD Crew Cab offers a transmission complete with a high-capacity six-speed ZF S6-650 manual is standard with Vortec 8100 or DURAMAX 6.6-liter turbo diesel engines...Both the short and long box 2012 GMC Sierra 2500 HD Crew Cabs come with a standard Vortec 6000 V8 (standard) with 300 horsepower engine.

Optional engines on both models: Vortec 8100 V8 (available) with 340 horsepower, DURAMAX™ 6600 Turbo Diesel V8 (available) with 300 horsepower engine."
Truck Resources GMC 2500 info (http://www.truckresources.com/2003-GMC-Sierra-2500-HD-Crew-Cab.html)

"The all new 2012 Sierra 3500 Truck is loaded with powerful Vortec engine
( Vortec 6.0L V8, Vortec 8.1L V8, and the DURAMAX 6.6L Turbo Diesel). A maximum towing capacity of up to 15,400 lbs and an available Allison 1000 series five-speed automatic transmission...The transmission in the new 2012 GMC Sierra 3500 is a high-capacity six-speed ZF S6-650 manual is standard with Vortec 8100 or DURAMAX 6.6-liter turbo diesel engines..."
Truck Resources GMC 3500 info (http://www.truckresources.com/2003-GMC-Sierra-3500.html)

I don't know how much I would trust that site you quoted. All of the spec's that are listed are completely incorrect. The Vortec 6.0L is 360hp and the Duramax is 397hp with a maximum towing capacity of 17,800lbs on single rear wheel models and 21,700lbs on dual rear wheel models. The Allison 1000 5-speed transmissions were in previous generations (2006 and older), since 2006 and the classic 2007 models GM has switched to the 6-speed transmission.

Dont expect much better out of a 6.0 new or old. My parents/I have an 09 2500Hd 6.0 and it averages 12 around town, and thats not with a heavy foot or towing.

I have to agree and disagree with this statement. I have an '07 2500HD Silverado NBS and I can get 14-15mpg around town with a light foot, but I do have to be careful about accelerating and making sure to coast to stop lights/signs. With a little heavier foot, I can still get 13mpg. All non-towing miles too.

hosejockey2002
05-20-2011, 11:41 PM
"The 2012 GMC Sierra 2500 HD Crew Cab offers a transmission complete with a high-capacity six-speed ZF S6-650 manual is standard with Vortec 8100 or DURAMAX 6.6-liter turbo diesel engines...Both the short and long box 2012 GMC Sierra 2500 HD Crew Cabs come with a standard Vortec 6000 V8 (standard) with 300 horsepower engine.

That's a BS website. Look at the truck in the picture, it's the old style front end, pre-2004. The HP specs they give are for the pre-07 Classic style. The new 6.0 and Duramax HP specs are much higher. If someone could actually show me a brand new 2011 or 2012 Silverado with an 8.1 engine in it I would gladly pull off the wiper blade inserts and eat them like black licorice.

dbear
05-21-2011, 08:44 AM
That's a BS website. Look at the truck in the picture, it's the old style front end, pre-2004. The HP specs they give are for the pre-07 Classic style. The new 6.0 and Duramax HP specs are much higher. If someone could actually show me a brand new 2011 or 2012 Silverado with an 8.1 engine in it I would gladly pull off the wiper blade inserts and eat them like black licorice.

I suppose in hindsight I should have added a disclaimer to my post indicating it's best to use your own judgement. I would have preferred confirmation directly from GM, but it was the best I could find. I'm admittedly unfamiliar with that site, and I suppose it could be just blowing smoke. It did seem odd to me that I could find no announcement from GM regarding the possible return of the 8.1 Vortec.

ConstSvcs
05-21-2011, 10:35 PM
unless you pull 20,000 pounds and dont have a diesel station near you dont get it. I have one and am going to sell it right after i am done with all my installs

Best advice yet...................

ConstSvcs
05-21-2011, 10:56 PM
Best advice yet...................

If I didn't have an equipment payment........I would have a truck payment on a 2500 HD / Duramax.........

The best milage my '03 2500HD, 4wd, extended cab, long bed Sierra ever reached was empty........highway = 15mpg @ 65 mph

Loaded with a 1100 lb Reading "Plus 8" steel utility cap, tools and fuel tank, the best I can get is 8 ;)

My Isuzu FRR cabover loaded higher mpg.

I love the ride...........but would never buy another gas powered HD work truck. I feel that a vehicle purchased for work needs to run 200K plus miles with low operating cost. Keep it clean, run it 8+ years and sell it off....roll the proceeds from the sale into a new vehicle and start over.

let me remind you that the North American continent is the largest market for gasoline work trucks.

hosejockey2002
05-22-2011, 11:33 AM
I love the ride...........but would never buy another gas powered HD work truck. I feel that a vehicle purchased for work needs to run 200K plus miles with low operating cost. Keep it clean, run it 8+ years and sell it off....roll the proceeds from the sale into a new vehicle and start over.

That's why everyone needs to analyze their own situation and buy what works for them. I bought a new gas truck in '05 and am glad I didn't buy diesel. The diesel was $9K more, and with as few miles as I run I would still be years away from making that $9K back in fuel savings. But if I towed heavy 25K miles per year diesel would have been the way to go. Even then, you couldn't give me a new diesel what with all the emission garbage on them, but that's a different topic altogether.

ConstSvcs
05-22-2011, 11:43 AM
Agreed Hosejockey !

Patriot Services
05-22-2011, 12:09 PM
My buddy picked up a new 2500 HD with the 8.1 in it. Bad ass motor. It's not on there website yet. Just to let you guys know.

Have you physically seen/driven this truck? Pics would be the proof it exists. If your routinely towing 20k, you need a deisel. Remember when guys thought V10's were worth the extra expense.
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ConstSvcs
05-22-2011, 02:24 PM
Sorry to drag out the thin oil on a " bad a$$ motor" thing but this is quoted direct from my 8.1L owners manual:

" as the chart shown previously, SAE 5W-30 is the only viscosity grade recommended for your vehicle. You should look for and use only oils which have the API Starburst symbol and which are also identified as SAE 5W-30. if you cannot find such SAE 5W-30 oils, you can use SAE 10W-30 which has the API Starburst symbol, if it's going to be 0 F (-18 C) or above. DO NOT USE other viscosity grade oils such as SAE 10W-40 or SAE 20W-50 under any conditions "

With the assumed engine loads under marine and industrial
applications and the acceptable GM oil consumption .......... It wouldn't be my motor of choice in a harsh operating environment.

Now I wouldn't have the same opinion if we were discussing an older 454 or 496 !!
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JDiepstra
05-22-2011, 08:23 PM
This thread is hilarious. My old 5.9 will beat up on an 8.1 all day, every day, and for years after the 8.1 is dead, and get double the mileage all while going 20,000 miles between oil changes. I couldn't think of a dumber purchase.

rcslawncare
05-23-2011, 01:06 AM
This thread is hilarious. My old 5.9 will beat up on an 8.1 all day, every day, and for years after the 8.1 is dead, and get double the mileage all while going 20,000 miles between oil changes. I couldn't think of a dumber purchase.

Only need three transmissions in a Dodge before the 8.1 dies...

tuney443
05-23-2011, 08:14 AM
This thread is hilarious. My old 5.9 will beat up on an 8.1 all day, every day, and for years after the 8.1 is dead, and get double the mileage all while going 20,000 miles between oil changes. I couldn't think of a dumber purchase.

And you would need to find a good deal where to buy stock for Duracell or Energizer for all the batteries you will go through for your hearing aids from that LOUD and LOUDER CLACKER of an engine.:laugh:I thought this thread was on the 8.1,NOT your oil burner.

White Gardens
05-23-2011, 08:19 AM
This thread is hilarious. My old 5.9 will beat up on an 8.1 all day, every day, and for years after the 8.1 is dead, and get double the mileage all while going 20,000 miles between oil changes. I couldn't think of a dumber purchase.

I couldn't be happier with my 8.1. And I'm super glad I didn't go with a diesel. I can get a new drop in block for the same price as a turbo on a diesel, so when it comes to repairs, I'll be cheaper in the end.

Besides, the 8.1 was a marine motor. If boat owners can depend on it to not break down in the water, then I can depend on it to not break down in a 12 inch snow storm.

Just want to add also, if I was running my dump everyday for everything I do, then it wouldn't be economical and a diesel might have been better. But, to have a dump with plenty of power and dependability to get used whenever I really need it, then I feel I made a great decision.

Keith
05-23-2011, 03:18 PM
Have you physically seen/driven this truck? Pics would be the proof it exists. If your routinely towing 20k, you need a deisel. Remember when guys thought V10's were worth the extra expense.
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Not sure what you mean by the V10 being an extra expense. Do you mean actual expense over the gas V8 or fuel consumption over the gas V8? If you are towing heavy over longer distances, by all means, the diesel is the way to go. But for more local towing, over short distances, frequent stops, I think the V10 was money well spent. It was a cheap option and the difference in fuel mileage with a similarly equipped gas V8 is negligible.

Patriot Services
05-23-2011, 03:36 PM
That was my point the V10's (ford & dodge) were fuel pigs. There was not much price difference between them and diesels. The towing performance was always better with the diesels. The small initial cost savings was quickly ate up by fuel usage. I have had one of each and economy was never above 10 mpg unloaded. Loaded was 6mpg. IMHO the 5.9 Cummins was the best all around engine ever put in a 3/4-1 ton chassis.
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White Gardens
05-23-2011, 04:25 PM
The small initial cost savings was quickly ate up by fuel usage. I have had one of each and economy was never above 10 mpg unloaded.
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That was the main deciding factor in my decision. The economy difference on a larger Cab and Chassis was negligible at best. You might have achieved 12 in a diesel and 10 in a gasser.

My 8.1 gets 10 across the board, loaded or unloaded.

Oakleaf landscape
05-23-2011, 08:03 PM
Have you physically seen/driven this truck? Pics would be the proof it exists. If your routinely towing 20k, you need a deisel. Remember when guys thought V10's were worth the extra expense.
Posted via Mobile Device

Yes I have seen the truck and he gave me a ride around the neighborhood in it as well. It's a legit 2012 8.1.

dbear
05-23-2011, 08:07 PM
That was my point the V10's (ford & dodge) were fuel pigs. There was not much price difference between them and diesels. The towing performance was always better with the diesels. The small initial cost savings was quickly ate up by fuel usage. I have had one of each and economy was never above 10 mpg unloaded. Loaded was 6mpg. IMHO the 5.9 Cummins was the best all around engine ever put in a 3/4-1 ton chassis.
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When I bought my 6.8 v10, (I wasn't towing, nor driving, enough to justify the diesel) the price delta between it and the diesel was about $6000. I thought that very significant at that time, and it's only gotten worse. My MPGs are a consistent 12-13 around town, 15-16 highway, and 9-10 towing. From what I read, the diesel option only gave marginal (2-3) MPG improvements, and significantly less reliability.

The 5.9 cummins was, by every report I've seen, the last great engine that balanced performance and economy.

scagrider22
05-25-2011, 07:15 AM
I called my dealer the other day to see if the 8.1 was really going to be available again and he said he has not heard anything about it so he called his rep from GM and they told him that the 8.1 is not available and probably never will be, they did say there would be a new gas engine but not until the next body redesign in 2014.

Patriot Services
05-25-2011, 07:22 AM
So how did the OP come across a truck even the factory says doesn't exist? Let's see engine tag pics or I have to call shenanagans.
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32vld
05-25-2011, 08:15 AM
Yes I have seen the truck and he gave me a ride around the neighborhood in it as well. It's a legit 2012 8.1.

With the factories not yet switched over to make 2012's, and them not on the dealer lots yet, and that 2012's are not for sale until the fall, how does this guy have one now?

Patriot Services
05-25-2011, 10:41 AM
SHENANAGAN'S!
Posted via Mobile Device

JDiepstra
05-25-2011, 04:32 PM
Only need three transmissions in a Dodge before the 8.1 dies...

WHen your truck is putting down 1000 lbs of torque yes youre going to need a rebuild at some point. Im doing 0 - 60 in less than 5 seconds with modifications to my stock trans. One build.

JDiepstra
05-25-2011, 04:33 PM
And you would need to find a good deal where to buy stock for Duracell or Energizer for all the batteries you will go through for your hearing aids from that LOUD and LOUDER CLACKER of an engine.:laugh:I thought this thread was on the 8.1,NOT your oil burner.

Sorry but a 5.9 HPCR is not loud.

Patriot Services
05-25-2011, 06:35 PM
TUNEY443-You mean the phantom 8.1 that is so secret even GM doesn't know it was already built and released before any other model?
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scagrider22
05-25-2011, 08:25 PM
With the factories not yet switched over to make 2012's, and them not on the dealer lots yet, and that 2012's are not for sale until the fall, how does this guy have one now?

Its all B.S. after I saw the this thread I tried to buy one and my dealer said he cant get me a 2012 until the begining of July and they will not have the 8.1 as an option. My dealer did confirm this with GM.

Patriot Services
05-25-2011, 08:28 PM
SHENANAGANS!
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White Gardens
05-25-2011, 08:41 PM
Boondoggled!

Patriot Services
05-25-2011, 08:50 PM
Bamboozled! Flimflammed! Double blue jay zabedah!
Posted via Mobile Device

mowerbrad
05-25-2011, 09:21 PM
While we're on the subjuct...

One of my buddies just bought a 2012 Ford F250 with the 7.3L powerstroke. Ford finally brought that engine back!!!!!

scagrider22
05-25-2011, 09:28 PM
While we're on the subjuct...

One of my buddies just bought a 2012 Ford F250 with the 7.3L powerstroke. Ford finally brought that engine back!!!!!

:laugh::laugh::laugh:

Oakleaf landscape
05-25-2011, 10:24 PM
I'm not joking guys, the 8.1 is back... You're dealer must be out of the loop but they are out...

scagrider22
05-25-2011, 10:47 PM
I'm not joking guys, the 8.1 is back... You're dealer must be out of the loop but they are out...

I guess the GM rep is out of the loop too! Not only did they come out with the 2012 early without anyone at GM knowing but they are sneaking the 8.1 under the hood too. Lets see a picture of this new truck!

tuney443
05-25-2011, 11:13 PM
Sorry but a 5.9 HPCR is not loud.

Comparing it to a full blown top fuel dragster you're right---comparing it to my LBZ Dmax,it's LOUD AS HELL! Sorry,but you will never convince me otherwise.Good solid engine,just flawed in the noise department.

deerewashed
05-27-2011, 08:25 PM
sorry goldpro, i am going to sell it if i cant get what i want from the dealer for a trade in for a 2006 D-MAX!!!!! thats the way all trucks should be......

JDiepstra
05-27-2011, 10:49 PM
Comparing it to a full blown top fuel dragster you're right---comparing it to my LBZ Dmax,it's LOUD AS HELL! Sorry,but you will never convince me otherwise.Good solid engine,just flawed in the noise department.

Ive never had a complaint. My neighbor has a DMax and has commented on how quiet my truck is.

scagrider22
05-28-2011, 03:24 AM
Ive never had a complaint. My neighbor has a DMax and has commented on how quiet my truck is.

Tell your neighbor to turn his hearing aid up. lol

hosejockey2002
05-29-2011, 02:00 PM
'm not joking guys, the 8.1 is back... You're dealer must be out of the loop but they are out...

Dollars to donuts it's a 6.0. Post a picture of the sticker under the hood that clearly shows it's a 2012 with an 8.1 and I'll eat my words.

Patriot Services
05-29-2011, 02:47 PM
Dollars to donuts it's a 6.0. Post a picture of the sticker under the hood that clearly shows it's a 2012 with an 8.1 and I'll eat my words.

Mmmmmmm! Donuts.
Posted via Mobile Device

White Gardens
05-29-2011, 03:27 PM
sorry goldpro, i am going to sell it if i cant get what i want from the dealer for a trade in for a 2006 D-MAX!!!!! thats the way all trucks should be......

Like what? An American made truck with a foreign motor?

snuckley
05-31-2011, 01:57 PM
OP, please describe the truck with the 8.1, crew/long bed etc./ Allison / single dually......I keep my 2005 8.1 . cause there's no more produced for yrs now, I heard they are maybe even going to stop producing the 8.1 crate motor at GM- I would have to buy aftermarket like Jasper if mine goes bad . They have a new marine bigblock 496 _ can't recall what they call it- but it is a generation 2 496/8.1 that just came out. Take a pix an post it for us.

deerewashed
06-01-2011, 07:46 PM
Like what? An American made truck with a foreign motor?

In 06 duramax engines were built in Moraine Ohio........

Patriot Services
06-01-2011, 07:54 PM
In 06 duramax engines were built in Moraine Ohio........

Of course. Because anything conceived and designed in OHIO would be named Isuzu. Ohio=Cleveland=Buckeyes=Isuzu. Makes perfect sense.
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scagrider22
06-01-2011, 08:03 PM
Of course. Because anything conceived and designed in OHIO would be named Isuzu. Ohio=Cleveland=Buckeyes=Isuzu. Makes perfect sense.
Posted via Mobile Device

G.M owns Isuzu and GM is American, (kind of). Hell what is American anymore?

Patriot Services
06-01-2011, 08:15 PM
G.M owns Isuzu and GM is American, (kind of). Hell what is American anymore?

So American they are building a 540 million dollar plant in MEXICO.
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scagrider22
06-02-2011, 11:13 PM
So American they are building a 540 million dollar plant in MEXICO.
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Is it going to be next to the Ford plant?:)

Patriot Services
06-03-2011, 10:23 AM
Is it going to be next to the Ford plant?:)

The Ford place is across the poop river. Next to the Trico wiper blades factory.
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GMLC
06-03-2011, 06:11 PM
Still no pics? GMC and Chevy websites say only the 6.0 and 6.6 are available for 2012.

Patriot Services
06-03-2011, 06:38 PM
No 8.1 and no end of the world. This year is full of disappointments.
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