Mystery EFI live longhorn fab - Chevy and GMC Duramax Diesel Forum
04.5-05 LLY Performance Parts Discussion Discussion of Performance Parts For the 04.5-05 LLY Duramax Trucks No Advertising

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post #1 of 14 (permalink) Old 09-29-2019, 08:21 PM Thread Starter
 
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Mystery EFI live longhorn fab

I bought a 2005 gmc from an auction and it has a longhorn fab shop efi live switch in it. Positon 2 is lope and 5 is whistle. I have no idea what 1,3,and 4 are. I dont want to ruin anything, is there any way to find out the other tunes?
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2005 GMC 2500HD 4x4 4 door short bed. Spur of the moment auction buy

1992 GMC 2500 6.5L Turbo Diesel 4L80E transmission. Best truck ever.
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post #2 of 14 (permalink) Old 09-29-2019, 09:05 PM
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Contact a Reputable tuner and get new tunes.

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post #3 of 14 (permalink) Old 09-29-2019, 09:42 PM
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I don't want to ruin anything,
Safe bet is not to choose any.
Find a Reputable Tuning source.

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post #4 of 14 (permalink) Old 09-30-2019, 06:26 AM
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Here is a possible solution for you. Contact the Longhorn Fab Shop and give them your VIN. They should have a record of who wrote the tune, what the tunes are, etc. If they don't have that record, then the best advice has already been given to you, get other tunes that you know and can trust.



Also, since you just got the truck you may find this thread interesting:

https://www.duramaxforum.com/forum/m...ew-owners.html

2008 Silverado 2500HD CCSB LTZ Diesel
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.

Last edited by Hook'em_Horns!; 09-30-2019 at 06:57 AM.
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post #5 of 14 (permalink) Old 09-30-2019, 06:59 AM
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The problem is NOT what the settings are.
The problem is printed on the switch.

Find a Reputable Tuner.

2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air

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post #6 of 14 (permalink) Old 09-30-2019, 07:15 AM
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Oh man, keep them. Cause you know that first tune is a “smoke” tune!

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post #7 of 14 (permalink) Old 09-30-2019, 09:52 AM
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Quote:
Originally Posted by Michaeljp86 View Post
I bought a 2005 gmc from an auction and it has a longhorn fab shop efi live switch in it. Positon 2 is lope and 5 is whistle. I have no idea what 1,3,and 4 are. I dont want to ruin anything, is there any way to find out the other tunes?

the only options i see are either to call long horn fab with the VIN and see if they can tell you what tunes are tied to that VIN, but as silver said, probably best to just get known good tunes from someone reliable.


Given there is a lope tune loaded..... the rest of them are probably garbage too..... just saying. "yes hello tuner man, id like my truck to sound like its broken 24x7 please?"

2015 Chevy Silverado 2500 HD 6.6L LML
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post #8 of 14 (permalink) Old 09-30-2019, 02:04 PM Thread Starter
 
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Quote:
Originally Posted by J83 View Post
Quote:
Originally Posted by Michaeljp86 View Post
I bought a 2005 gmc from an auction and it has a longhorn fab shop efi live switch in it. Positon 2 is lope and 5 is whistle. I have no idea what 1,3,and 4 are. I dont want to ruin anything, is there any way to find out the other tunes?

the only options i see are either to call long horn fab with the VIN and see if they can tell you what tunes are tied to that VIN, but as silver said, probably best to just get known good tunes from someone reliable.


Given there is a lope tune loaded..... the rest of them are probably garbage too..... just saying. "yes hello tuner man, id like my truck to sound like its broken 24x7 please?"
I dont get the lope tune either, i wanted a stock truck but this one came up and its from oaklahoma so almost no rust. Everything around here is rotted out and twice the price. So i took a gamble on it.

2005 GMC 2500HD 4x4 4 door short bed. Spur of the moment auction buy

1992 GMC 2500 6.5L Turbo Diesel 4L80E transmission. Best truck ever.
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post #9 of 14 (permalink) Old 09-30-2019, 05:19 PM
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Quote:
Originally Posted by Hook'em_Horns! View Post
The problem is printed on the switch.

Find a Reputable Tuner.
There are several Diesel shops around here that will work with reputable people, they dont' write anything, just resell. Not ever having heard of that shop, I was thinking that might be the case. And if it was, finding out what he has might save him some cash.

2008 Silverado 2500HD CCSB LTZ Diesel
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.
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post #10 of 14 (permalink) Old 09-30-2019, 05:34 PM
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Short horn fagshop has shit tunes. They pioneered lope and smoke tunes. Used to send out 230hp "transmission safe" tunes that were like 3000us 40*timing and would cover up issues by turning off cels in their tunes. The traction bars are the only thing they ever sold that were worth a shit. Lots of the old heads that remember this still have a sore spot for them
Hook'em_Horns! and ALLY Cat like this.

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