05 2500HD with 6.0 BAD MPG, HELP - The 1947 - Present Chevrolet & GMC Truck Message Board Network

teeitup · 03-04-2012, 08:51 PM

HI guys, sorry I don't get up to the board too much, hang out on the 67-72 board. Anyway I have a 05 2500 HD ext cab and was getting 220 to a tank of gas and now I'm only getting about 170-180 miles, thats like 8 MPG. I had a mechanic put it on his machine and everything checks out as far as gas usage. Any ideas or help is appreciated. Thanks Randy

teeitup · 03-04-2012, 09:55 PM

pic

edhtrd71 · 03-05-2012, 01:29 AM

How many gallons is it taking to fillup? It is pretty common for fuel level sensors to fail and cause an erratic gauge. Is it shifting erratically, mass air flow sensors get dirty or start to fail and cause crazy fuel ratios and the trans to shift erratically.

teeitup · 03-05-2012, 09:00 AM

It takes like 22-23 gallons when I'm low. Its shifting and runs great. I did notice my oil pressure gauge seems to be running around 40# the other day, never noticed it there before. Thanks Randy

MadManAndrew · 03-05-2012, 10:05 PM

And I thought I got bad mileage. Damn. At least I average about 12mpg. Maybe a fuel leak?

clinebarger · 03-06-2012, 01:37 AM

Quote:

Originally Posted by teeitup

It takes like 22-23 gallons when I'm low. Its shifting and runs great. I did notice my oil pressure gauge seems to be running around 40# the other day, never noticed it there before. Thanks Randy

Should have a 34 gallon tank on a 2500HD.

teeitup · 03-06-2012, 06:45 PM

Mine doesn't have that big of tank. Just got it out of shop, he said the air intake sensor was dirty and they installed new plugs. So we sill see if that helps any. Thanks Randy

hopped up · 03-06-2012, 06:47 PM

hope it helps! my 64 gets better mileage than that
Posted via Mobile Device

MadManAndrew · 03-07-2012, 10:11 PM

Quote:

Originally Posted by teeitup

Mine doesn't have that big of tank.

Yeah, mine isn't near that big either. It's the same size as yours. Don't know where he gets hissss info...
Posted via Mobile Device

clinebarger · 03-07-2012, 10:40 PM

Quote:

Originally Posted by MadManAndrew

Yeah, mine isn't near that big either. It's the same size as yours. Don't know where he gets hissss info...
Posted via Mobile Device

I said it "should" Not It "does", Ive owned & work on these trucks for a living.......
My old 04 CCSB 1500 had a 34 gallon tank.
My current 06 CCSB 2500HD has a 34 gallon tank.
Yes I know this is a optional tank, But when it get 12-15 MPG having a small tank sucks.

His truck looks like a LT3 trim package truck.....All LT3 trucks Ive seen have the large tank.

MadManAndrew · 03-08-2012, 07:37 PM

The way you phrased it was as if all 2500HD's came from the factory with 34gal tanks and that his was supposed to, and that was not true. If you in fact did not mean it that way, then I wasn't contradicting you, just clarifying.

My truck consistently gets 12mpg and even when the small amount of miles I drive I still fill up every 5-6 days. And when there are no diesel stations that are convenient to me that means I have to plan to fill up and make time out of my day to do so. Yes, it does suck very much.

PO: Glad to hear you think you got it fixed. Let us know if your mileage does indeed improve?

03-04-2012, 08:51 PM	#1
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	05 2500HD with 6.0 BAD MPG, HELP HI guys, sorry I don't get up to the board too much, hang out on the 67-72 board. Anyway I have a 05 2500 HD ext cab and was getting 220 to a tank of gas and now I'm only getting about 170-180 miles, thats like 8 MPG. I had a mechanic put it on his machine and everything checks out as far as gas usage. Any ideas or help is appreciated. Thanks Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

03-04-2012, 09:55 PM	#2
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	Re: 05 2500HD with 6.0 BAD MPG, HELP pic Attached Images __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

03-05-2012, 01:29 AM	#3
edhtrd71 Registered User Join Date: Jan 2011 Location: Edinburg, Texas. Posts: 194	Re: 05 2500HD with 6.0 BAD MPG, HELP How many gallons is it taking to fillup? It is pretty common for fuel level sensors to fail and cause an erratic gauge. Is it shifting erratically, mass air flow sensors get dirty or start to fail and cause crazy fuel ratios and the trans to shift erratically.

03-05-2012, 09:00 AM	#4
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	Re: 05 2500HD with 6.0 BAD MPG, HELP It takes like 22-23 gallons when I'm low. Its shifting and runs great. I did notice my oil pressure gauge seems to be running around 40# the other day, never noticed it there before. Thanks Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

03-05-2012, 10:05 PM	#5
MadManAndrew Registered User Join Date: Mar 2011 Location: Dallas, Texas Posts: 920	Re: 05 2500HD with 6.0 BAD MPG, HELP And I thought I got bad mileage. Damn. At least I average about 12mpg. Maybe a fuel leak? __________________ 1955 Chevy 3600 http://67-72chevytrucks.com/vboard/s...61#post8589061

03-06-2012, 06:45 PM	#7
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	Re: 05 2500HD with 6.0 BAD MPG, HELP Mine doesn't have that big of tank. Just got it out of shop, he said the air intake sensor was dirty and they installed new plugs. So we sill see if that helps any. Thanks Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

03-06-2012, 06:47 PM	#8
hopped up Registered User Join Date: Jul 2010 Location: los angeles,ca Posts: 3,617	Re: 05 2500HD with 6.0 BAD MPG, HELP hope it helps! my 64 gets better mileage than that Posted via Mobile Device

03-08-2012, 07:37 PM	#11
MadManAndrew Registered User Join Date: Mar 2011 Location: Dallas, Texas Posts: 920	Re: 05 2500HD with 6.0 BAD MPG, HELP The way you phrased it was as if all 2500HD's came from the factory with 34gal tanks and that his was supposed to, and that was not true. If you in fact did not mean it that way, then I wasn't contradicting you, just clarifying. My truck consistently gets 12mpg and even when the small amount of miles I drive I still fill up every 5-6 days. And when there are no diesel stations that are convenient to me that means I have to plan to fill up and make time out of my day to do so. Yes, it does suck very much. PO: Glad to hear you think you got it fixed. Let us know if your mileage does indeed improve? __________________ 1955 Chevy 3600 http://67-72chevytrucks.com/vboard/s...61#post8589061



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