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GMC Acadia Real World MPG

60 messages,  Last post on Aug 03, 2009 at 1:23 PM

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What is this discussion about? GMC Acadia, Fuel System, SUV

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#47 of 60 Acadia mpg by fletch6 Apr 07, 2008 (1:40 pm)
I bought a 2007 Acadia in June of 2007, and drove to Ohio from Fl. I went up I95 to 77 in South Carolina, and I averaged 72 miles an hour, and got 23 mpg up and back. I have not had any problems with my Acadia, unless you consider all the complimemts I get on my Acadia a problem.
#48 of 60 Acadia MPG by phillybill Apr 29, 2008 (4:54 am)
I am getting 7.2 MPG all city with a soft foot, no compressor, and mostly coasting like a granny. Called the dealer and they took it for a test and said they got 16.6 MPG city. I checked the DIC when I got the car back and notice that they did get 16.6 but had an average speed of 36 MPH. meaning for their city test, they put some highway on it. Called the sales man to complain and he actually told me to go f-- myself. He could care less about the problrems I am having just so long as the sale was made. If he had not bait and switched me, maybe I would have one of the working Acadias instead of this Lemon. As of today, 7.2 MPG, check engine light on twice for cam shaft glitches, dealer had it for 3 days and did nothing to repair because the light went out on its own.
#49 of 60 Pretty impressed w/ the Acadia. by kbacon May 23, 2008 (6:39 pm)
I've got a '08 SLT1 FWD and have had it 3 wks now. Milage has slowly been increasing the more I drive it... about 1100mi now. Averaging about 19mpg lately... started at 17mpg average. Reset the DIC heading home other night (15mi)... started coasting (shift to neutral) as soon as I saw lights turn yellow.. tried not to brake if I didn't have to. Slowly eased on the gas when taking off.. and I managed to average 27.7mpg for that 15 mi trip. This was going 45-55-45-55-45-35-30.. I caught a couple of stop lights.. but made most of them. I was highly impressed!
#50 of 60 12 MPG! by manufan1 Jun 02, 2008 (9:59 am)
By this month I've had my '07 AWD Acadia for a year. There is no major problems to my Acadia and I still love it as the first day I bought it. So far my only complaint is the poor MPG. Yeah it wasn't a problem before but now it is. The 17/24 has been a fairy tale to me.   I am not a agressive driver and I know all the gas saving tricks. The first time I filled up the gas tank then set up the the odo....It ran only 220 miles and the gas light on. To make sure that I did it couple of more times and found out no big changes.
#51 of 60 Not getting the MPG by stdavis Jun 05, 2008 (4:55 pm)
Well I have to concur with manufan1. Purchased the 08 Acadia AWD SLT2 Dec 30th 07 and have put about 5000 miles on it so far, almost 100% in town driving and I haven't seen 15 MPG yet, as a matter fact the MPG has declined to under 13 since we have started needing the AC more. In every other way the vehicle has exceeded my expectations, but I would be glad to give up performance to achieve anything approaching 18MPG in town. I have an 04 BMW X5 4.8is with 60k on it and I routinely get 16.5 in town. It's hard to imagine driving any more conservatively than what I do now. Has anyone heard of a fix that GMC might apply to improve the milage??? I've heard of programing adjustments that may change shift points in the transmission that could improve milage, Replies to this message: manufan1 (Jun 11, 2008 10:31 am)
#52 of 60 Re: Not getting the MPG [stdavis] by manufan1 Jun 11, 2008 (10:31 am)
Replying to: stdavis (Jun 05, 2008 4:55 pm) I had that software update 3 month after I bought my Acadia because GM sent me the letter for the update. It did make big difference on the accelerating performance. The update made transmission work more responsive than before and since then I started to feel I was driving a normal car, otherwise when I drove it up/down hill, or just to accelerate it, I could hear the engine noise went abnormal, tranmission odo went up & down and it was just lost control. I did not record the MPG before I did the update but I believe it was worse than now.    I think the update is only recomended for some same lot Acadias because it was a problem. Wonder how they rate their MPG 17/24, or maybe where I live has too many traffic lights?
#53 of 60 VERY Poor MPG by benmc Jul 01, 2008 (5:55 pm)
I've had my '07 SLT Acadia for over a year now and am NOT impressed with this vehicle at all! 90% of my driving is interstate, and I'm getting 19 mpg. I probably should have kept my Tahoe, which got 17 mpg! I am seriously considering selling and getting a Toyota Highlander Hybrid. This will truly be the LAST General Motors car I ever purchase. The misleading 17 city/24 highway is a true farce - and was only touted this way to sell the car. Bad move, GM!   So if you are considering purchasing an Acadia ... be FORWARNED!
#54 of 60 Acadia mpg. by olds4 Jul 07, 2008 (6:23 pm)
My wife and i have a 2007 Acadia which we have enjoyed for well over a year now.I have been very impressed with the mpg of our Acadia = 19-21 city/hwy driving.I truely find it an accomplishment for a vehicle of this size and weight not to mention the amount of power the engine puts out to get this kind of fuel milage.Just to put things into perspective - i also have a 1997 GMC Sonoma,single cab,step side with a 4cyl standard which only gets 24-28 mpg. I just wish my wife could drive a standard so we could trade off sometimes.     I have read a lot of post about Acadias on this site and i have come to the conclusion that most people do not know how to figure their fuel milage.Take my wife for instance - she always goes by what the onboard display tells her,which is sometimes not fully accurite.The onboard display was showing around 17mpg,but when i did the real math my self (miles divided by gallons of gas) it came out to 19mpg.This test being in a 3-day period of driving back and fourth to work-city/hyw 50/50.There are a lot of red lights and my foot is very heavy - so i was very happy with my results.So my point being - if you do not like the mpg that the onboard display shows - just do the math yourself,it may make you feel better.   going on 20,000 miles-and my 2nd power steering pump.a happy customer so-far.
#55 of 60 Improvements on MPG by stdavis Jul 08, 2008 (4:14 am)
After taking my Acadia back to the dealer and having them go through the car to ensure everything is 100% they told me that a couple of things might help the MPG, so I thought I would pass it along. First, I took them up on replacing the air in my tires with nitrogen. I thought this was a gimmick, but it was only 39.95 plus tax and I am willing to try anything at this point to improve the MPG. They also told me to run the tiers at 38 psi from the 32-34 I was running. Initially it looks like I gained a 1-2 MPG Second, they told me to make sure I filled up at Tier 1 gas stations and be sure to only fill up with pure gas, no ethanol. This seems to have given me another 1-2 MPG improvement. Third, they tell me that GMC will come out with a new spec for their transmission soon and that I could expect a little improvement from this as well, but it might be a while. Apparently, this will only be a programing change in the transmission shift points that should result in fewer shifts between 20-30 mph. I think the transmission shifts fine, but they tell me there are a lot of complaints regarding how much shifting the vehicle does in this range. The end result for now is that I have seen a change from ~12.5 mpg in town 14.5-15mpg. This is 100% in town driving under pretty much the worse conditions for mpg, with continuous stop and go averaging about 25-40 miles a day calculated manually over several tanks of gas and the on board computer is dead on. We'll take a nice long road trip soon and see it we can achieve anywhere near the 20mpg+ that so many people have reported getting.   I must also say that since our Acadia is only 6 months old and we have put about 6k on her that the dealer told us they would be willing to swap for a different Acadia if it came down to that. I would hate to put this to the test, but at least it was a offer that goes above and beyond what I thought they would do. I told them I might consider giving up the AWD for better MPG if I could get everything else the same. Of course the AWD shouldn't be a factor since all the driving has been done under dry conditions where the AWD shouldn't be kicking in.   White Diamond Tri-Coat 08 Acadia SLT 2 AWD
#56 of 60 Re: MPG [chezky] by shoshy5 Aug 07, 2008 (4:17 pm)
Replying to: chezky (Dec 25, 2007 2:19 am) we only get 8.2 miles per gallon city NORMAL driving. my armada got b/w 10-11 mpg. just got it about a month ago have to fill it up every 5-6 days and summmer were hardly driving like the schoolyear . the dealer said maybe the computer needs to be adjusted, is the computer eating my gas? also when i accelerate the car kind of kicks like its trying to catch up to speed.

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