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04-18-2010, 02:54 PM | #1 | |
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2001 GMC Yukon Poor Mileage
Hey Guys,
I was wondering if anyone would be able to help me figure out why I am getting such bad gas mileage. 2001 GMC Yukon SLT 5.3 L V8 Spectre Cold Air Intake Flowmaster Super 44 Exhaust New O2 sensors 14 mpg avg. 12 city 15 hwy Is this normal mileage that is to be expected from this vehicle? I added the cold air to get some power, and it helped the mpg a little bit. Anything I can do? Thanks guys |
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04-19-2010, 08:32 AM | #2 | |
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Re: 2001 GMC Yukon Poor Mileage
You could do a full scan and look at fuel trim readings to see if the engine is running rich.
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04-19-2010, 09:05 AM | #3 | |
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Re: 2001 GMC Yukon Poor Mileage
Do you know where I would be able to do that cheaply? I don't want to pay $40 for a diag. fee if I don't have to.
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04-19-2010, 11:48 AM | #4 | |
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Re: 2001 GMC Yukon Poor Mileage
No, this requires a fulls can, unless a friend has one you have to have a regular shop do it.
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04-19-2010, 01:06 PM | #5 | |
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Re: 2001 GMC Yukon Poor Mileage
Ok. Thanks. I think I'll just leave it as-is because I plan on selling it this summer to get a diesel truck.
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04-28-2010, 05:40 AM | #6 | |
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Re: 2001 GMC Yukon Poor Mileage
The diesel truck plan ended up falling through. I am thinking that a major reason my gas mileage is bad is my spark plugs and wires. They are the original. Any recommendations?
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04-28-2010, 08:11 PM | #7 | |
Firefighter317
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Re: 2001 GMC Yukon Poor Mileage
yeah. replace the plugs and wires with AC delco. They may be higher than aftermarket but they are well worth it. I work at a GM dealer and there IS a difference in parts brands. Check your air filter while your at it, and if dirty, replace it as well.
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05-06-2010, 02:24 PM | #8 | |
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Re: 2001 GMC Yukon Poor Mileage
sorry to say, but that is not "bad" MPG...it is just what the vehicle gets....I've owned one for about 8 years now and that is the average...14.
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05-06-2010, 07:48 PM | #9 | |
Firefighter317
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Re: 2001 GMC Yukon Poor Mileage
Yep thats exactly right. They average 14 mpg. 12 in the city, 16 on the highway. Just keep your vehicle well taken care of n it will stay at 14 mpg
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07-20-2010, 08:30 AM | #10 | |
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Re: 2001 GMC Yukon Poor Mileage
Sorry for getting back so late guys. I ended up finding out what it was. One of my friends put in a new o2 sensor, and for some reason put some antiseize on the threads. Turns out the antiseize shorted the sensor out when it liquefied. Now, during the summer, I avg. 15.5 mpg. During the winter I get 14
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08-02-2010, 08:34 PM | #11 | |
Firefighter317
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Re: 2001 GMC Yukon Poor Mileage
antisieze is actually a good idea. it keeps the O2 sensor from getting stuck and siezed up in the exhaust pipe and makes it much easier to remove if needed. You just have to know how much to put on so you dont have problems like this.
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Tags |
bad , gas , gmc , mileage , yukon |
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