Edmunds dealer partner, Bayway Leasing, is now offering transparent lease deals via these forums. Click here to see the latest vehicles!
Popular New Cars
Popular Used Sedans
Popular Used SUVs
Popular Used Pickup Trucks
Popular Used Hatchbacks
Popular Used Minivans
Popular Used Coupes
Popular Used Wagons
Comments
I wish I had my Prius back then when I was commuting 30 mi from N Jersey to lower Manhattan in the 80s and 90s.
Congrats on your new Sequoia, Gary. All the managers here who have the choice of what to lease or buy for their family vehicles take the Sequoia over the Land Cruiser for the comfort and space.
I think GM would have better served their customers with diesel versions that would pass emissions and guarantee better mileage. Time will tell if they made the right decision. Not Time Magazine.
Is the article online for free?
Yes it is. Go to Time.com and search hybrid in the search bar.
Agreed first attempt was a mild hybrid and was a lousy one, hence its cancellation. The new more advanced dual mode hybrid is far cry much improved hybrid solution. Yea, lots of marketing hype but I guess we'll see.
Besides Time there's quite a bit of other just published articles on green autos from other magazines. Kiplinger Finance magazine is one, there are others.
"The premium V-8 diesel engine is expected to deliver class-leading refinement, horsepower and torque and fulfill multiple vehicle applications with ratings in excess of 310 horsepower and 520 lb-ft of torque."
30 MPG in a two wheel drive pick up is projected.
http://www.autoblog.com/2007/06/15/gm-announces-clean-diesel-v8-for-pickups-and-- the-hummer-h2/
Nice!! Audi is doing the something for their Q7 SUV Diesel V6, similar to the current Mercedes GL350. It was one of the options I was looking at but it seems Audi is pushing out this vehicle till sometime next year. :mad: Besides, Audi has some of the best lease rates in the auto industry.
Definitely, that new small TDI diesel should work well with the new GM pickups and H2s. I like the torque ratings enough to tow some large loads. They should consider putting it into the Lambda platforms such the Enclave or Acadia. But Instead GM is working on Hybrids for those vehicles. Hence below.
http://www.gminsidenews.com/forums/showthread.php?t=49339
Now imagine, If GM can marry those two technologies The TDI Diesel and the Hybrid, now you are talking 40-50MPG. Slick.
Thats great news and it means Im holding out for one now..
Also I now hear that the introduction is delayed until the 1st Quarter of 2008? Originally it was supposed to be this quarter. Anyone know what caused the delay?
The Prius also came with a low MSRP but the DEALERS were gouging customers with large markups.
I talked to a local dealer he said the same thing. I haven't heard anything official from GM. GM has a product brochure for the hybrid.
As for the price, it sounds encouraging. This one is at the top of my list.
Any internal combustion engine creates a lot of heat. All the parts of an engine go through a heat cycle where they expand and contract. A part that is round at room temperature is not round at 300 degrees.
The reason I say this, is this; the cylinder bore that the piston goes up and down in is supposed to be round;;it's machined that way. The way it stays round is this,,there is holes drilled around the round cylinder which pass coolant or antifreeze through, thus evenly cooling the round cylinder bore that the piston lives in.
In the chevy v8 the cylinders are set up in two rows of four. If you shut off 2 or 4 of these cylinders these cylinders will become unround or oval shape because of the heat that will be transfored from the cylinders that are working and creating a lot of heat.
If you think the intake gasket leak problem on all chevy tahoes was bad wait until you see entire motors failing. I will say it will take about 50,000 or 60,000 miles and you will see severe engine damage and catistrofic engine failure....This motor is destined for the discovery channels'show "engineering failures"
I think your analysis has some good theory behind it. This is not a new way of trying to save gas. Honda has a V6 in their Odyssey and not sure what else with VCM. I have not read of any early failures yet. I am a keep it simple kind of guy so I would probably not be interested in such an engine.
I don't think this will be a problem. The cylinders deactivate and reactivate continuously. I suppose in theory if one was going down a VERY long slope the cylinders might shut down for a few minutes, but in general the problem most people have always had with variable cylinder usage is that they don't shut down frequently enough to really help MPG. The moment extra power is required, even momentarily, the cylinders come back on line.
However, this marks the first use in hybrid applications, so maybe they will shut down more. But considering the heavy weight of the Tahoe, it is very likely that all cylinders will be active much of the time.
Also, we don't know how Chevy programmed the engine. It may well be that it is not the SAME cylinders shutting down - they may alternate, which spreads the heat around.
I agree above, “Cylinder deactivation” is only on when the engine is in very light loading conditions (going down hill, cruising on the highway. etc). So heat being generated is pretty minimal. If the vehicle is towing or if the vehicle is accelerating, the internal engine software will activate all of the cylinders and the heat distribution in the engine will be some what even. .
To this day I have not heard any latent catastrophic failures with the 5.3LV8 engines. I checked NHTSA and their defects website and it shows nothing. Also GM has a 100K mile powertrain warranty which covers the engine for that length of mileage. They wouldn’t guaranty the life the engine if they had some real test data that didn’t support it. If the engine fails you could always have it replaced. So I wouldn’t worry about it.
I received official notice that GM has pushed out the Hybrid Yukon till early next year. Must be having some sort of problem. :mad:
(The GMC site doesn't list the weight of the Yukon, but I'm guessing it is 5500 lbs or maybe more...)
I actually wonder if the "problem" isn't that this class of vehicle is too heavy for hybridization to provide a real benefit, other than shutting down the engine when stopped. That is what happened to the hybrid pickup - no real MPG savings. Of course the pickup had the 110v electric capability which may have been useful to some owners.
Dual mode doesn't provide as much benefit to a large and heavy vehicle; the electric motors deplete very quickly due to the large amount of weight that has to be accelerated.
With heavy vehicles the situation degrades to the point that it would take too much battery to provide enough boost, and then one has to remember that the battery adds weight and takes up room as well. AND hybrid components are complex and expensive. Some people assume that LiIon batteries will be the answer, but I'm not convinced that the recharging/heat problems of this technology will be overcome any time soon.
That is the only thing I miss since selling my GMC Hybrid PU. I don't think the auto-stop saved enough gas to make any difference. It may have used more as there is a debate whether starting an engine uses more gas than idling for a minute or less.
Yea, I could not find it in the product brochure but lists 7300Ibs for the gross vehicle weight for the regular Yukon, This includes passengers.
The "problem" at this point may be minor such as battery or Hybrid motor or some other part availability (just guessing). If GM pushes out the introduction again then you know is something more serious. Problems like this always occur during the production of these complex vehicles or other items especially for the first year. I know I work in engineering, there always issues in complex projects like these and that's why the companies pay us the big bucks to resolve them.
I rather see GM delay the introduction and produce it right then shipping out a lemon :lemon:.
As for the Hybrid motors, perhaps it drains those Nickel Metal Hydride batteries faster than it was meant to. Lithium Ion batts are the way to go at least for the short term until a new exotic battery comes into fruitrition. The battery designer need to be careful though as lith ion batteries, if its not designed correctly, could explode or cause severe out gassing. Hence Toshiba and Dell Notebook recalls due to the lith ion batteries. Talk of polymer batteries might be the next thing but its all in paper. For Hybrid batteries its all about power and density and lithium ion seems to fit the bill at least for now. In some cases the Lith ion batteries can provide 50 percent more power in the same volume or space as with NiMH Batts.
GM needs to get hot and release the hybrids.
The T/Y 2Ms save more fuel than either of these two 'classic' hybrids.
My alternate viewpoint, assuming that the 2Ms work as described, is that all BoF SUVs should have the 2-Mode system installed mandatorily. Doing this will save our country far more fuel than any other single step other than banning SUVs altogether, which will not happen barring some obscene fuel shortage.
Yes hybrid components are complex and expensive to replace but reliability across the board has increased dramatically. Hybrids are among the most reliable vehicles at every manufacturer. Prius, Escape, Civic all are good bets not to leave you in a lurch.
I really don't see how this could be an issue. The engine is still water cooled and all cooling channels still get the same amount of coolant flowed through them whether they are firing or de-activated. The heat build-up / differences between cylinders will not be significant enough to make things out of tolerances. Look how much air cooled engines expand and contract without issues. Since this is a water cooled engine, it's true that the tolerances will be tighter, but then, the operating heat range is smaller as well, with or without deactivated cylinders.
Plus, like other have said, they are de-activated for very short time periods and if the 'brain' is deactivating them, it means you are on a very low power situation so the other cylinders are likely barely working at all. Basically in a coasting or idling work mode rather than a "make power" mode like when accellerating. At which time, all cyclinders will be working anyway. This technology has been around for quite a while (in everything from 4 stroke auto engines to two stroke outboard boat motors) so it's nothing new. No doom and gloom needed.
Since Toyota has abandoned LiIon for the 2009 Prius Refresh, I would be shocked if GM solved the problems inherent with current LiIon batteries.
Ford was originally going to put a hybrid powertrain in the Explorer. They halted the concept because it turned out that they could achieve the same MPG increase with a 6 speed transmission. A Ford Explorer is probably 2000 lbs lighter than a Yukon at full load.
The point is that it takes a lot of energy to push that kind of mass up to speed, and I don't think that a 3 ton gas/electric hybrid is necessarily going to provide enough MPG savings and/or power.
Both of these are significant accomplishments.
Both of these are significant accomplishments."
I understand your point, but I will wait to see what MPG the vehicles get in actual useage. The same point was made about the Sierra Hybrid P/U, and it was dismal in actual performance. If the difference is 1 MPG that is not a "whole lot of fuel saved for the country"... :surprise:
Actually, it is when you are talking about such low mileage vehicles. It's more about percentage increase and number of gallons saved and not mpg increase.
If real world numbers in a vehicle improve it from 15mpg to 16.5mpg, that is a real world increase of 10%.
Toyota camry (I4 engine) is rated at 31 hwy vs Toy. Cam. Hybrid rated at 38 hwy (I don't know what the real world numbers are). That is a about a 23% increase.
However (and it's a big however), look at the number of gallons of gas burned over 15,000 miles in a year.
Changing from 15mpg (1,000 gallons) to 16.5mpg (909 gallons) saves 91 gallons a year.
Changing from 31mpg (483 gallons) to 38mpg (394 gallons) saves only 89 gallons a year.
What this shows is the planet would be way better off focusing on getting an extra 1 or 2 mpg out of the worst gas mileage vehicles rather than getting more mileage out of already high mileage vehicles. If they got the same 23% mileage improvement on the trucks, the difference would be even more obvious. Now you'd save 187 gallons a year.
Of course, ideally, everyone would change the type/class of vehicle they drive to a smaller and inherently better mileage class, but if that is not going to happen, the real "world saving" differences will be seen improving the gas guzzlers and not the gas sippers.
This has all been outlined before, but it was worth repeating because it is not an obvious train of thought. It's really all about using less gallons of gas a year. Improving the worst of the worst will prove far easier (and have a far larger impact) than improving the best of the best.
Yes, agreed. This should be our first order of business as a tion, actually 2nd IMHO.
1st.. Every government vehicle Federal or State must be either a hybrid or diesel.
2nd. Every BoF SUV must use the 2-Mode or similar technology
3rd. Every truck must be a diesel
4th. Within 7 yrs all the older technology vehicles must be off the road.
2nd. Every BoF SUV must use the 2-Mode or similar technology
3rd. Every truck must be a diesel
4th. Within 7 yrs all the older technology vehicles must be off the road.
Wait a minute, some people may call that communism. I don't. Agreed, something is got to be done. Above may be some crucial steps. You might want to include some of the tougher CAFE standards which the auto companies are against.
Every bit counts for the larger gas-a-hog trucks or SUVs whether we save 1 mpg or more. With gas prices in some areas in CA hitting close to $5,00 a gallon and slated to go higher every bit counts. A good time to overfill your air in the tires by a few pounds to add some extra MPG on your vehicle. That seems to work well for me.
Saw a good show in CNBC "Street Signs" along with Brian Williams during NBC Nightly News. They were broadcasting out from a Chrysler MFG plant in Detroit. The Chrysler plant was spitting out trucks every minute or so. The plant was somewhat automated with robotics, looked pretty amazing on TV. Just curious, why didn't CNBC/NBC visit the GM plant where the Hybrids are being built?? Perhaps no cameras or news reporters allowed?? Too bad. Other than that, the shows were well produced.
Pardon my ignorance, but what does BoF stand for? Yea, I know I've been living in the west coast too long.
This is what most SUVs are, a body on a truck ladder frame.
OTOH the newer lighter and more fuel efficient vehicles are Crossovers. These are similar or even larger inside but they use a unibody construction like a car does.
The first Crossover was the RAV4 back in 95. The first large volume Crossover was the Lexus RX300 which was an SUV body on a Camry frame. Instead of getting 15-16 mpg most crossovers get 20-23 mpg.
Truck frame vs the crossover unibody construction.
Ala, Ford Exploder Vs. Buick Enclave. Got it thanks.
The Yukon is BoF.
This will leave..
Tahoe, Yukon, Escalade, Suburban, Expedition, Aspen/Durango, Sequoia, 4Runner, FJ, Armada, Xterra
My daughter and son-in-law are leaning now to a Dodge Caravan. I believe the oil companies have the auto manufacturers by the hand and dancing into record profits. The little bit of extra mileage they are getting makes it not worth the while to buy the expensive junk. If I was to buy a new car it would be a Toyota Prius just to make the oil companies eat their high priced gas.
GM said the Chevrolet Tahoe Hybrid's suggested retail price would be $50,490 (two-wheel drive) and $53,295 (four-wheel drive), while the GMC Yukon Hybrid would be $50,945 (2WD); and $53,755 (4WD).
Those prices include a $900 destination charge and pending IRS approval, could be eligible for a federal tax credit.
All I can say is WOWSA!! You can drive a LONG way for the 10K premium people. So much for the theory that they were going to almost cost the same. This officially means I will be looking elsewhere for my next vehicle. I'm not getting into a vehicle that STARTS out costing the same as the first condo we ever owned. Sorry but I just don't see the value everyone.
I'm with you. My 1998, last of the good Suburbans, was a very well built vehicle. The new stuff is tinny crap with plastic bumpers. Much of it was forced onto the automakers by lame government regulations. I should have never sold my 98 Suburban. It was 7 years old, trouble free with only 45k miles. I bought a 2005 GMC hybrid PU that was built out of tin foil. The new ones are even tinnier. The only thing my Suburban needed was a small diesel engine to be the perfect vehicle. I think the EPA, automakers and the oil companies are tied together. They keep adding more devices to clean the air a tiny bit more and never worry about the MPG. We keep buying as much oil, have lots more stuff to replace on the vehicles and the EPA has bragging rights on the infinitesimal amount they cleaned up the exhaust.
All three win and the consumer gets the big shaft.
I agree for their pocket books.
NiMH batteries are not that expensive. I agree motors are pretty expensive, electronic controllers are pretty cheap. If you compared a stripped down Yukon for the cost in the low 30's to the hybrid in the low 50's, thats a 20K difference in price. All those new parts for the hybrid does not justify the 20k adder though. That's why think these numbers are little fishy and inflated. I agree, I beleive they will lower the price in about six months if they want to be competitive.
God I hope you didn't pay the full MSRP for your Sequoia. Considering that this is their last year for this version and Toyota is moving to the new updated Tundra chassis.
NO way. I got it for $10k less than MSRP. Right at $4k under invoice. I bought the last year of the model as I don't want all the first year problems and it was a good buy. I am not a Toyota fan. I think the Sequoia, at least in this generation is a decent vehicle. I think Toyota electronics are behind GM by a few years. My 2005 GMC Sierra Hybrid PU with Bose stereo with XM standard is head and shoulders above the Sequoia sound system, that you cannot get XM or Sirrius even as a dealer add-on.
On a long trip I was able to squeek out 22 MPG on my GMC hybrid. Around town it was mostly 15 MPG. Hopefully the new GMC hybrid will be better than the first try.
I have done those numbers before, and I still think that it may not be significant enough. Any increase is good, of course, but designing the vehicle lighter and with a smaller engine would possibly have greater effect.
OK, 91 gallons a year is something, but I'm not sure if it is worth the hybrid premium, depending on what the extra cost of the hybridization comes to.
I'm not sold that a battery pack is better than clean diesel for this purpose. After all, it is easier to refine diesel than gasoline.
2nd. Every BoF SUV must use the 2-Mode or similar technology
3rd. Every truck must be a diesel
4th. Within 7 yrs all the older technology vehicles must be off the road."
RE: Diesel. Bring it on, you can't buy them new in CA or I'd be driving one.
RE: Retiring older cars. My daily driver is a 1987 Corolla FX. It runs cheap and needs little maintenance. I drive it because it is nimble and I like it, but a lot of people cannot afford new vehicles and don't have any choices.
Are you personally planning on paying for those new cars?
Pretty repressive ideas. Sounds like Hillary care for cars. Totally unrealistic. You will have to pry the steering wheel of my 1990 Lexus from my cold dead fingers.
By the way many of the vehicles in the CA government agencies are CNG. Much cleaner than hybrids or diesels.
The new hybrids should be better, but, at those prices I don't think is worth it. :mad: GM has resposibility and duty to make these hybrids affordable for everyone for country and the environment. This is good example why the goverment will probably add more regulations in the future.
Glad to hear you got a substancial discount on your Sequioa. My brother has one for many years and has had no trouble with it. The current Sequioa hasn't really changed in the last five years and not surprised that XM and other up to date goodies are not being offered. But, with the new updated Sequioa with the tundra chassis that should change.
I still think you are doing more for the environment by keeping your cars for as long as possible, in good condition.
The newer vehicles have more up to date emission contol components. Plus the air quality standards keep getting tougher. Newer vehicles have to meet the tougher air quality standards. So I beleive the newer the car ,the more friendler towards the air we breathe, generally speaking. Don't mean to disagree with you.
I'll be at the LA Auto Show Friday the 23. I have not been in one in over 10 years. I use to go to the shows all of the time. Want to see the Yukon Hybrid and the Audi Q7 3.0L TDI (if they have one). Do a little conversing with the reps. If I'm lucky possibly spot somebody else.