2005 LLY injector issues - Chevy and GMC Duramax Diesel Forum
2001 - 2007 (GMT800) Non Powertrain Discussion of 01 to 07.5 Topics Not related to the Powertrain, interior, suspensions, body,wheels, tires, ect.

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  • 1 Post By Timsduramax
 
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post #1 of 7 (permalink) Old 01-17-2020, 07:29 PM Thread Starter
 
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2005 LLY injector issues

I have read a lot about injector wiring issues, I have done a lot of troubleshooting. Codes 201,202,203,204,205,206,207,208,2146,2149. Replaced connectors on injectors 2 and 7, inspected all wiring. Iím still having the same issue. Has anyone had both banks shutdown? Iíve been to a GM dealer and they couldnít diagnose. Brought to another shop and they couldnít diagnose either. It will run for several weeks then bam shutdown. When it was running we pulled and tugged on all the wiring and it wonít repeat. Any help would be greatly appreciated.
Thanks
Tim
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post #2 of 7 (permalink) Old 01-17-2020, 10:09 PM
 
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Check the wiring that is secured to the alternator bracket.I put a piece of hose on my harness and resecured it. Also check the wire harness connector bracket above left engine valve cover; may have a rub from a bolt. May want to check your grounds and wire harness connectors are secure. You can get a wiring schematic from GM upfitter. Good luck.

2004 Chev Silverado LT 2500hd 6.6 LLY
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post #3 of 7 (permalink) Old 02-04-2020, 01:35 PM Thread Starter
 
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Got another code today P1293A.
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post #4 of 7 (permalink) Old 02-05-2020, 12:20 AM
 
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Did you fix the other codes. May have a bad FICM.

2004 Chev Silverado LT 2500hd 6.6 LLY
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post #5 of 7 (permalink) Old 02-05-2020, 06:49 AM
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Sounds to me like a ficm issue. Got one you can pull off any try?

Name: Matt
ASE Certified, former GM Parts guy
John Deere Service Manager

Play Truck - 2002 LB7 2500HD Crew Cab Short Bed
Daily/Tow Rig - 2006 LLZ 2500HD Crew Cab Short Bed

SOLD - 2007 LBZ 2500HD Standard Cab Long Bed
SOLD - 2006 LBZ 2500HD Crew Cab Short Bed
SOLD - 2004 LLY 2500HD Crew Cab Long Bed
TRADED - 2002 2500HD Crew Cab Long Bed
SOLD - 2001 2500HD Ext. Cab Long Bed
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post #6 of 7 (permalink) Old 02-10-2020, 09:20 AM Thread Starter
 
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Replaced FICM. Truck runs great.
Thanks for the information and ideas.
Question: If I remove the catalytic converter and delete the EGR. Will I gain any HP.
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post #7 of 7 (permalink) Old 02-10-2020, 10:53 AM
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Getting rid of the catalytic converter will open the exhaust up and let it breathe better. A full exhaust will help more than just removing the cat, but that is getting harder and harder to do with the clinching grasp of EPA enforcement. EGR delete will help as well, so it could free up a couple horses between the combination of them

Name: Matt
ASE Certified, former GM Parts guy
John Deere Service Manager

Play Truck - 2002 LB7 2500HD Crew Cab Short Bed
Daily/Tow Rig - 2006 LLZ 2500HD Crew Cab Short Bed

SOLD - 2007 LBZ 2500HD Standard Cab Long Bed
SOLD - 2006 LBZ 2500HD Crew Cab Short Bed
SOLD - 2004 LLY 2500HD Crew Cab Long Bed
TRADED - 2002 2500HD Crew Cab Long Bed
SOLD - 2001 2500HD Ext. Cab Long Bed
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