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Chevy Tahoe/GMC Yukon Hybrid

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What is this discussion about? Chevrolet Tahoe Hybrid, GMC Yukon Hybrid, Hybrid Cars, SUV

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#289 of 301 2002 Tahoe Hybrid by pappysway Oct 18, 2008 (7:04 am)
I drive a 2002 Tahoe with 5.3 Litre engine and installed a Hydrogen Hybrid Upgrade System and getting about 5 mpg better now. I'm thinking about maybe installing another one or two units for even better mileage. I like my Ho and really can't see dropping the $60K or so for the new Hybrid, especially when I already have one that's paid for and suits me well. It's got over 132'000 miles and is well cared for. The hydrogen installation wasn't that difficult. The toughest part was finding a good place to mount the hydrogen generators, I put on two generators up in the bumper. There is a lot of space there and the hydrogen generators fit like it was made for it. The system came from THOR. They have a website www.kickgasgohydrogen.com. check it out, I got the CombiPak.1.S. It cost about $900 including two of the hydrogen generators and shipping. Those guys are very helpful, they answer email and the telephone and answered all my questions while I installed it. The hydrogen seems to give it more power too.
#290 of 301 Re: MPG [juddsonr] by concerned10 Mar 25, 2009 (12:38 pm)
Replying to: juddsonr (Aug 16, 2008 11:38 am) I know that it has been a long time since your post, but curious if you ever reconciled your issues with the gas mileage? I just purchase a 2008 4X4 Yukon Hybrid and have been averaging only 16 mpg on 3,550 miles. Short of getting rammed in the rear for driving so slowly, my wife and I have tried everything to get the mileage to go up. Took it to the dealer, they said everything was running fine. Then, they stated that the sticker says that "depending upon driving conditions it should get between 16 and 24 mpg. Proceeded to tell me that my gas mileage was within those parameters. They also told me that their salesmen vehicles were getting the 20/20 as advertised. I asked to go out and look at one. While there, I asked them to turn on the computer and guess what - 13 mpg!! Contacted GM and they wanted nothing to do with me. I'm convinced GM's Hybrid technology is a scam. Curious to see how yours is doing? Thanks!
#291 of 301 2008 Yukon Hybrid Gas Mileage by concerned10 Mar 25, 2009 (12:43 pm)
I have a 2008 Yukon Hybrid with approximately 3,550 miles on it Driving the vehicle under normal conditions, not tearing it up by any means, we average only 16 mpg, or less. My wife and I have tried everything, short of causing pile-ups behind us by driving slowly enough to stay between the green while entering freeways. I am anxious to hear from other owners out there to see if I have the only bad one out there, or if this is the norm. I contacted GM and the dealer and they told me that it was operating normally because it falls within the 16-24 estimated mileage according to the EPA. A regular Yukon will get better than 16 on average. As it stands, I would not consider this vehicle if you are looking! Call me first. Replies to this message: juddsonr (Mar 26, 2009 7:38 am) bbooze (Mar 31, 2009 6:09 am) concerned10 (Mar 31, 2009 7:14 am) patnwfla (Oct 29, 2009 10:18 pm)
#292 of 301 Re: 2008 Yukon Hybrid Gas Mileage [concerned10] by juddsonr Mar 26, 2009 (7:38 am)
Replying to: concerned10 (Mar 25, 2009 12:43 pm) I kept mileage logs on every tank of gas for the first 6400 miles and the average was 17.4 mpg. I quit logging the tanks partly out of frustration with the numbers but mainly due to my wife was filling up the tank without resetting and writing down the mileage. I now have ~12000 miles, and have noticed that my averages (based on the on board computer) have been ~19.5. It would be interesting to know what kind of driving you are primarily doing. My "in town" driving is the majority of what I do. Lots of stop and starts, rarely over 45 mpg, usually around 35. I really think that under 35 stop and go is kryptonite for this truck, and all trucks. I agree with you, I would not buy the hybrid again. The mileage improvement is nice and considerable, when compared to a Denali which I would have otherwise gotten. It is quieter and seems to ride smoother. However, the lack of spare tire, power liftgate, and poor design of the second row seats when folded forward annoy me. Furthermore, I'm not impressed with instantaneous throttle response. Yes, when you get the engine revving and are accelerating at mid to 3/4 throttle, the torque resembles a diesel in feeling, but when pulling into traffic or merging and you need that instant grunt, it responds slowly. To that end, I have told my dealer that if a comparable Denali comes in as a trade with similar miles and we can swap, to call me.   I will say that I think my mileage improved after those 6200 miles when I stopped caring about the economy gauge. Flip the trip computer to show the instant economy, and when accelerating, get to speed quickly, then maintain a constant speed, and try to keep the instant gauge in the 20s. Logic says accelerate slowly, but this truck weighs A LOT, and getting it to speed uses a lot of gas whether the electric is helping or not. The major savings to improve average MPG IMHO, come from steady speed driving at moderate speeds (40-65 mph).   BTW, My 80-85 mph averages have been around 18.5mpg. My Dad's (2007 Denali) 80-84 mph are about 16.0mpg.
#293 of 301 Re: 2008 Yukon Hybrid Gas Mileage [concerned10] by bbooze Mar 31, 2009 (6:09 am)
Replying to: concerned10 (Mar 25, 2009 12:43 pm) I've had the '08 Tahoe Hybrid for just over a year now and the worst mileage I've gotten is ~17.5mpg. Usually I average around 18-19 during the winter and 20mpg in the summer. Weather has a lot to do with this as the thing needs to warm up in the winter before you get full electric mode at low speeds.   I've been very happy with the mpg performance of my Tahoe. Replies to this message: concerned10 (Mar 31, 2009 7:14 am) patnwfla (Oct 29, 2009 10:18 pm)
#294 of 301 Re: 2008 Yukon Hybrid Gas Mileage [bbooze] by concerned10 Mar 31, 2009 (7:14 am)
Replying to: bbooze (Mar 31, 2009 6:09 am) Thanks for sharing your thoughts. I am pleased to hear that you are really getting that type of mileage, which I would be delighted with. I have only owned the vehicle since January, and it has been very cold here in Minnesota, so you may be onto something. Can I ask where you are from? It must also be cold there based on your reply.
#295 of 301 Tahoe Hybrid Driveline noise by tahoedrvr Jun 01, 2009 (1:33 pm)
I'm checking to see if anyone else has this issue.   My '08 Tahoe Hybrid, w/14k miles, makes a noise that sounds like a cross between a suspension creak and a u-joint clank when it pulls away from a stop. Tech thought it was crossmember flex/pop. Now they say it is normal noise. I don't recall it on the demo I drove for a day. Everything like transmission and motor mounts, u-joints etc, has been checked, lubricated. I don't think they've sold a lot of these things, so I'm skeptical when I'm told its "normal" noise. Anyone out there have this same noise? Other than this issue, we're happy w/ the vehicle, our mileage is a consistent 22+ mixed city/commute, and high as 25+ on trip at highway speed (Yes I checked it several times). Big improvement from our '04 Suburban (which we kept). I got this at end of September '08, basically because it was the most steel I could put around my wife and kids per gallon of gasoline.
#296 of 301 2009 Yukon Hybrid 4X4 noises by lesgas1 Jul 28, 2009 (9:39 am)
I have a 2009 GMC Yukon Hybrid with 4300 miles on it. The vehicle recently started making a noise while accelerating and braking. The sound is strange it's a combination of a thump, thump, thump and a whirring. It really gets annoying and it can't be hidden by turning up the radio. Again this is a new sound, I know what the hybrid should sound like. The Dealer took a look and found nothing. Has anyone else experienced this noise? Thanks
#297 of 301 Car hesitating way more than normal by ransom777 Aug 10, 2009 (3:25 pm)
Hi,   My Yukon Hybird seems to be hesitating much more than it should. It also seems to have trouble when I slow down finding the right gear to be in....anyone else have this problem? Replies to this message: concerned10 (Aug 10, 2009 3:41 pm) ransom777 (Aug 11, 2009 3:44 pm)
#298 of 301 Re: Car hesitating way more than normal [ransom777] by concerned10 Aug 10, 2009 (3:41 pm)
Replying to: ransom777 (Aug 10, 2009 3:25 pm) Ransom, I can't speak on behalf of the hesitation, but mine also has difficulty finding the proper gear at slow speeds (i.e. 30 mph). I took it in just last week to tell them that at 30 mph (for a consistent period of time), the RPM's fluctuate wildly. They said that they have updated software to correct such, and hooked it up to the computer to download the software. This seems to have fixed it at 30, but now seems to have a similar, but lesser, issue at 15 mph. Take it in and have it hooked up.   P.S. - My gas mileage is now logging in at 19.8 mpg, so I am now quite satisfied about that. Replies to this message: ransom777 (Aug 11, 2009 3:44 pm)

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