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Old 11-02-2005, 08:09 PM
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Default Chevy K2500 7.4l

Looking at purchasing this 2000 model with 95k miles for 10k. Gas 454 engine. One owner and the owner claims 15mpg on the highway not towing. It is a crew cab. Does this mileage sound accurate?

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Old 11-02-2005, 08:55 PM
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Default Re: Chevy K2500 7.4l

If it is a 2 wheel drive....maybe....

I doubt that number is correct with 4 wheel...

It may be geared tall as well...which would hurt it's towing prowess...


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Old 11-02-2005, 09:08 PM
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Default Re: Chevy K2500 7.4l

I call BS on 15mpg out of anything with a 454 in it, just not going to happen. I would think you would see milage in the 11-12 range, maybe 13 or so if you take it real easy. The upside is that towing milage typically isn't much worse than other motors in similar sized trucks. For a tow rig, it's tough to beat a chevy big block, just not to great as a daily driver.

My next vehicle move is likely going to be that same route, a truck with balls that can handle absolutely any work duty that I need, and a sedan (I'm thinking maxima or accord with a manual transmission) that get's around 30 mpg to drive around town and back and forth to work.
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Old 11-02-2005, 09:42 PM
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Default Re: Chevy K2500 7.4l

I read too many forums. Just finished reading about 40 threads on pickuptruck.com. Looks like the 454 can get better mileage than the 350 if it is geared properly. The truck I am looking at has a Flowmaster (whatever that means) and dual exhaust. Not sure about the gearing. More research..... I only get 16mpg on the highway with my Tundra... 12 when I tow lightly. K2500 can't be much worse, can it?

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Old 11-02-2005, 10:03 PM
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Default Re: Chevy K2500 7.4l

no, the 2500 will probably come in around between 8 & 10 mpg with a good load behind it. my brother's got a F250 w/ the 7.3 PS diesel, once you break the 5k lb mark, or hook up to something that catches the wind, milage is below 12, so even a diesel isn't going to be much better. To tow a load, it takes a certain amount of power, to make that power you have to burn an amount of fuel, that doesn't change too much between vehicles & engines when under load. The biggest downfall of the big displacement gas motors is that they require a large amount of fuel when they aren't under load just to get clean combustion, this makes them drink gas, it doesn't fall off that much when towing compared to smaller engines that have to work hard.
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Old 11-03-2005, 06:51 PM
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Default RE: Chevy K2500 7.4l

Flowmasters are turbo flow mufflers. Flowmaster is a name brand. Gives a nice throaty exhaust note. Big motor, big gas bill. Is this going to be a daily driver, strictly tow, how many miles in a week? Sounds like a good price if it's in nice shape. What about air filter? Stock, K&N what? There are a few different things you can do to bring gas mileage up. A FEW, not many but they make small differences. You can get the aftermarket exhaust,(which it already has) and air filter and a little gizmo you put in line with the filter to make the air flow into the throttle body more efficently. Check to see if it has a catalytic converter. 2000 may require one to run properly (backpressure requirements) If it needs one you can purchase an aftermarket cat with a higher flow rate at a performance shop.

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Old 11-03-2005, 07:26 PM
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Default RE: Chevy K2500 7.4l

Quote:
tinmarine - 11/3/2005 7:51 PM

Flowmasters are turbo flow mufflers. Flowmaster is a name brand. Gives a nice throaty exhaust note. Big motor, big gas bill. Is this going to be a daily driver, strictly tow, how many miles in a week? Sounds like a good price if it's in nice shape. What about air filter? Stock, K&N what? There are a few different things you can do to bring gas mileage up. A FEW, not many but they make small differences. You can get the aftermarket exhaust,(which it already has) and air filter and a little gizmo you put in line with the filter to make the air flow into the throttle body more efficently. Check to see if it has a catalytic converter. 2000 may require one to run properly (backpressure requirements) If it needs one you can purchase an aftermarket cat with a higher flow rate at a performance shop.

Jim
I took a drive in this truck today. Nice price and alot of truck.The guy swears he hets 15mpg on the highway not towing and being easy with the foot. What really got me a little confused is the tow rating. I was expecting 10k but it has a 3.73 rear end and is only rated for 8.5k. I hardly do any driving during the week. I work at home. My average day is a trip to a store, school or to go pay bills. I still manage to drive alot of miles during the year but most of them are highway. For example, I'm heading to Morehead this weekend to look at a boat,maybe three. I'll likely drive 800miles this weekend. I looked at the air filter but didn't get any specs. It was a very large Fram, looked like a standard setup. That 7.1L Vortec is a monster.

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Old 11-03-2005, 07:33 PM
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Default RE: Chevy K2500 7.4l

Got a 2500 '00 Suburban 4x4. Vortec 6000 V8, I'd be pushing it if I promised 16mpg hwy. 60,000 miles 1 owner ---Every Option LT ( for sale by the way). Doubt his mpg.
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Old 11-03-2005, 07:35 PM
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Default RE: Chevy K2500 7.4l

Also have 4.10 rear .
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Old 11-03-2005, 07:38 PM
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Default Re: Chevy K2500 7.4l

I got a 94 suburban 2500 7.4 bought new 2wd best its ever done highway 13 round town 9 or 10 usually 7 or 8 I put flowmasters on it cut the converter off K/N air filter still no better I got an 02 crew cab hd with 8.1 gas it does about the same, plus is it will out pull that 7.4 hands down
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Old 11-03-2005, 09:45 PM
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Default Re: Chevy K2500 7.4l

the 95 and older chevy blocks are a completely different experience than the 96 & up models. They completely reconfigured the intake, ignition, & heads on the new engines, which made great increases in performance. The cat comment above I would not mess with, there isnt' that much power to be gained by messing with them, unless you do extensive other mods. the 96 & up trucks have an O2 sensor behind both cats, aka, you can take them out without screwing stuff up. The 6.0 suburban wouldn't be bad considering you are talking about getting a mid size contender, I put 190k on a 6.0, great motor.
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Old 11-04-2005, 07:37 AM
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Default Re: Chevy K2500 7.4l

I'll put this in perspective for you. I have 99 two door, 2wd Tahoe, with the 5.7. It's got scads of power. I almost never push it hard, around town I get 11 mpg. The Tahoe is lighter than a Suburban and, maybe the same as the K2500. It's a bigger hole to throw gas into, it's got to eat more. I could believe 15 MPG if he lives by a highway on ramp and, works close to an off ramp.
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Old 11-04-2005, 07:54 AM
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Default Re: Chevy K2500 7.4l

If it's a 2000 doesn't it have the 8.1, I thought They discountinued the 7.4 when they changed the body style (2000 model year) I've got a 2002 2500 Suburban w/ the 8.1 and I've never gotten better than 12mpg highway.Average is 10.5 -11.00 highway and 9.5-10 city.Granted I do have the 4.10 rear and had to put 305's on it so it wouldn't dig itself to China while surfishing OBX,but even with the stock 245's it only got 13mpg once.Towing my 25 Seavee I get 6.5 highway.If it does have the 8.1 make sure you research that motor, there are oil-related issues on some of them. Mine was one of them, Chevy rebuilt the top end at 26000 miles due to massive oil-consumption issues, but only after filing a cliam with the BBB since the dealer wouldn't address the issue. I love the way it drives, it's a rocket and will tow anything, but I'm used to Toyotas' quality and this thing is a lemon.......Want to buy it?
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Old 11-04-2005, 08:06 AM
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Default RE: Chevy K2500 7.4l

FWIW, I have a 4x4 K1500 suburban w/5.7 liter 350. I have measured 16.5 on all highway miles with a bunch of crap loaded inside.

If it's true that the 454 works less and the 2wd gets better mileage, you might make out OK on highway miles, but I bet it's a pig around town.

Either way, it's a good price.
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Old 11-04-2005, 08:19 AM
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Default Re: Chevy K2500 7.4l

Quote:
other line - 11/4/2005 8:54 AM

If it's a 2000 doesn't it have the 8.1, I thought They discountinued the 7.4 when they changed the body style (2000 model year) I've got a 2002 2500 Suburban w/ the 8.1 and I've never gotten better than 12mpg highway.Average is 10.5 -11.00 highway and 9.5-10 city.Granted I do have the 4.10 rear and had to put 305's on it so it wouldn't dig itself to China while surfishing OBX,but even with the stock 245's it only got 13mpg once.Towing my 25 Seavee I get 6.5 highway.If it does have the 8.1 make sure you research that motor, there are oil-related issues on some of them. Mine was one of them, Chevy rebuilt the top end at 26000 miles due to massive oil-consumption issues, but only after filing a cliam with the BBB since the dealer wouldn't address the issue. I love the way it drives, it's a rocket and will tow anything, but I'm used to Toyotas' quality and this thing is a lemon.......Want to buy it?
they made the older body style trucks through either 2001 I believe, I know through 2000, in addition to the newer silverado line. Most of them were comercial service vehicles, but there were some fairly well dress ones.
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Old 11-04-2005, 08:27 AM
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Default Re: Chevy K2500 7.4l

I am going to look at another truck today. F-250 PSD 2002 XLT. 7.3 4x4 asking 14K.

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Old 11-04-2005, 10:10 AM
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Default Re: Chevy K2500 7.4l

Quote:
HeadHunt - 11/4/2005 9:27 AM

I am going to look at another truck today. F-250 PSD 2002 XLT. 7.3 4x4 asking 14K.

HH
One owner, 85k miles and he claims 20mpg on the highway. Sound reasonable?

HH
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Old 11-04-2005, 10:30 AM
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Default Re: Chevy K2500 7.4l

that is reasonable depending on gearing, my brother's got a crew cab short bed 4x4 PSD w/ an auto, also an 02', his has 3.73 and will do 19 unloaded if speeds are kept around 70 or 72, once you get the rpms up a little more it drops off to around 17. Around town is consistantly 14.5-15, and he has a heavy foot.
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Old 11-04-2005, 10:32 AM
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Default Re: Chevy K2500 7.4l

Even though it may be 4k more, this sounds like a better deal that the K2500 w/454.

HH
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Old 11-04-2005, 10:38 AM
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Default Re: Chevy K2500 7.4l

definitely, you will like the F250, the 7.3 is a rock solid platform. If you buy it, get the tranny flushed & change the fuel filter, and change the fuel filter every other oil change after that. Clean fuel is key on the injector pump. Other than that, the only thing I would be sure to do is give it a 10 minute or so cooling off period after working it hard (can you say saluda grade), real simple and will give you much better turbo life.
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