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Marky Dissod

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While waiting for my wife to get back from her nail appointment, she calls and tells me she ran the pickup out of gas ...
I know for a fact that in the GMT800 pcm, the fuel level displayed on the DIC is tuneable,
because I tuned mine to display slightly less gas than the GM OE 'tune' displays.

Do not know if the fuel level displayed on the DIC is tuneable in the GMT900 ecm, but if it is,
it might make her a bit less likely to run out of gas next time? Maybe ...
 
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swathdiver

swathdiver

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One would think that a modern pickup would have some kind of low fuel warning. ;)
She was aware that the light came on and had 39 miles left. She swears she didn't drive or idle that much after it came on. Both pickups need to be refueled soon after the light comes on whereas the Yukon can seemingly be driven for days when its light comes on. That's what she's used to I reckon.

Both of my daughters and now my wife have filled the pickups with 26 gallons or more. They have a 26 gallon tank. The Yukon XL has a 31.5 tank size and my record fill is 30.8 gallons but the usual is 26 gallons within 10-15 miles of the light coming on.
 

Marky Dissod

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While waiting for my wife to get back from her nail appointment, she calls and tells me she ran the pickup out of gas ...
I know for a fact that in the GMT800 pcm, the fuel level displayed on the DIC is tuneable,
because I tuned mine to display slightly less gas than the GM OE 'tune' displays.

Do not know if the fuel level displayed on the DIC is tuneable in the GMT900 ecm, but if it is,
it might make her a bit less likely to run out of gas next time? Maybe ...
One would think that a modern pickup (/suv) would have some kind of low fuel warning. ;)
She was aware that the light came on and had 39 miles left. She swears she didn't drive or idle that much after it came on.
Both pickups need to be refueled soon after the light comes on, whereas the Yukon can seemingly be driven for days when its light comes on.
That's what she's used to, I reckon.
Sounds like a few good reasons to tune the fuel level displayed ...
 

homesick

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She was aware that the light came on and had 39 miles left. She swears she didn't drive or idle that much after it came on. Both pickups need to be refueled soon after the light comes on whereas the Yukon can seemingly be driven for days when its light comes on. That's what she's used to I reckon.

Both of my daughters and now my wife have filled the pickups with 26 gallons or more. They have a 26 gallon tank. The Yukon XL has a 31.5 tank size and my record fill is 30.8 gallons but the usual is 26 gallons within 10-15 miles of the light coming on.

My bike had a 4.2 gal capacity. I got 4.5 gals in it a couple of times. Pump calibration issue?

joe
 

Marky Dissod

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Both of my daughters and now my wife have filled the pickups with 26 gallons or more. They have a 26 gallon tank.
The Yukon XL has a 31.5 gallon tank, and my record fill is 30.8 gallons, but the usual is 26 gallons within 10-15 miles of the light coming on.
'02 Owner's Manual (ol fashioned flipbook printed June 18th '01) said:
*Tahoe / Yukon (SWB) fuel tank: 98.4 Litres or 26.0 U.S. Gallons (seen as low as 98.04L / 25.9 U.S. G)
Suburban / XL (LWB) fuel tank: 117.3 Litres or 31.0 U.S. Gallons
Suburban / XL 2500 fuel tank: 145.7 Litres or 38.5 U.S. Gallons
None of those measurements account for the small amount of space that should be left when the 'float' strikes the tank's ceiling,
or for the potential expansion of cold fuel into a warm tank, so that the EVAP system can do its job.
 

PG01

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She was aware that the light came on and had 39 miles left. She swears she didn't drive or idle that much after it came on. Both pickups need to be refueled soon after the light comes on whereas the Yukon can seemingly be driven for days when its light comes on. That's what she's used to I reckon.

Both of my daughters and now my wife have filled the pickups with 26 gallons or more. They have a 26 gallon tank. The Yukon XL has a 31.5 tank size and my record fill is 30.8 gallons but the usual is 26 gallons within 10-15 miles of the light coming on.
Ran out of gas on the seven mile bridge…. Had 30 something miles to go… i thought… it went from displaying how many miles to low fuel…. Man i got yelled at for that one…a few years later i was at the top of Florida about to get into Georgia….jacksonville or just above it…. Yeah that was fun…i called AAA, 911, and FDOT help truck… just to see who would get there first…. HELP truck got there before the stateys did…. AAA never showed…. or so i think… yelled at yet again…..lol….meanwhile i would tell her the few times she drove if we got down to 1/4 tank, stop and fill up… i guess i should heed my own advice…;)
 
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swathdiver

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Ran out of gas on the seven mile bridge…. Had 30 something miles to go… i thought… it went from displaying how many miles to low fuel…. Man i got yelled at for that one…a few years later i was at the top of Florida about to get into Georgia….jacksonville or just above it…. Yeah that was fun…i called AAA, 911, and FDOT help truck… just to see who would get there first…. HELP truck got there before the stateys did…. AAA never showed…. or so i think… yelled at yet again…..lol….meanwhile i would tell her the few times she drove if we got down to 1/4 tank, stop and fill up… i guess i should heed my own advice…;)
When I go on trips, I already know where we're going to stop. Always have plenty of fuel in reserve in case we get held up due to an accident or bad weather and such.

Lost a t-top on 7 mile bridge once! It didn't take kindly to triple digit speeds in a Trans Am! LOL

Oh, what's going on with yours?
 
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swathdiver

swathdiver

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Went outside this afternoon and the battery was at 12.6 volts and 70% state of charge. Cleared all codes again and got the seats working by using the Tech-2 to move them and then the door buttons worked once again. I also finally remembered to replace that fuse for the rear accessory outlet (cigar lighter).

Started and ran fine every time. My son-in-law came over and tested voltage from alternator to battery, checked the resistance on the battery cables and some other things and everything checked out. This new battery might be one of those that doesn't like a full charge. I had one like that that lasted 4 years once. My daughter had one like that lasted about six years and only charged into the mid 70% range the whole time.

First pictures were with the engine off and not having been started since the night before.

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I'll take it out again later, I hear Steak-n-Shake has twenty-five cent shakes tonight...
 
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swathdiver

swathdiver

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Took the family to Steak 'n Shake for dessert last night in Vero, for those patriotic birthday shakes with the little chocolate statue of liberty on top. About an 80 mile or so round trip. The new battery was now taking a charge and the battery temperature was just a few degrees above ambient. Went from 70% to 78%. Smooth sailing.

My son-in-law, Frank, recently bought a 2013 HD2500 Sierra Denali Duramax. This is what my daughter used to try and rescue the Yukon but wound up breaking down as well. The truck had an aftermarket controller for the engine tune, one of those with the dial to change the power level for economy, power, more power, etc. Well, that thing fried when they went to jump the Yukon. It wasn't the low oil that killed it, it was the aftermarket tuner. He pulled that out and the pending codes from before and after went away and he said it runs even better now.

So what did I do wrong? When I got the truck back I put it on the tender and the battery state of charge was 100%. Saw the door ajar code during my first test drive and ordered a new one. We had power to the interior but sometimes hard to start so we ordered a new positive battery cable. Then after those were changed the crank sensor code showed up so we ordered a new one and changed it. Did the bad jump start take out all these things or was it a coincidence? Was everything a false positive with a battery masquerading as good, showing a state of charge of 70%? GM says if a battery won't hold a state of charge after sitting overnight above 65% it's due for replacement.

It probably has an internal short. It's on the tender again and will check it tomorrow with the voltmeter. Then it goes back for the core charge.

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Battery usage was pretty much the same in how the truck was driven since we got it.

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Thoughts?
 

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