u0121 u0100 u0101 help! - Chevy and GMC Duramax Diesel Forum
07.5-10 LMM Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

 
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post #1 of 4 (permalink) Old 08-06-2019, 11:18 AM Thread Starter
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u0121 u0100 u0101 help!

Hey guys I’m having trouble with 08 lmm it’s got efi and that’s bout it.. while I’m driving all of a sudden all lights on dash light up (abs,brake,etc) speedometer and gauges start going crazy.. I’ve gotten a new tcm and had flashed at the dealer and still nothing I was thinking maybe a loose connection on the two main wiring plugs under the hood but wouldn’t know had to go about it. Any input would help thanks!
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post #2 of 4 (permalink) Old 08-06-2019, 01:03 PM
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Check the grounds, from engine to frame and all others.
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post #3 of 4 (permalink) Old 08-06-2019, 06:04 PM Thread Starter
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Here’s a vid of what’s going on... https://youtu.be/Oj31CXAT_1Y

Hey guys I’m having trouble with 08 lmm it’s got efi and that’s bout it.. while I’m driving all of a sudden all lights on dash light up (abs,brake,etc) speedometer and gauges start going crazy.. I’ve gotten a new tcm and had flashed at the dealer and still nothing new batteries checked fuses I was thinking maybe a loose connection on the two main wiring plugs under the hood but wouldn’t know had to go about it. Any input would help thanks!
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post #4 of 4 (permalink) Old 01-11-2020, 07:19 PM
 
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update

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Originally Posted by ATPLMM View Post
Hereís a vid of whatís going on... https://youtu.be/Oj31CXAT_1Y

Hey guys Iím having trouble with 08 lmm itís got efi and thatís bout it.. while Iím driving all of a sudden all lights on dash light up (abs,brake,etc) speedometer and gauges start going crazy.. Iíve gotten a new tcm and had flashed at the dealer and still nothing new batteries checked fuses I was thinking maybe a loose connection on the two main wiring plugs under the hood but wouldnít know had to go about it. Any input would help thanks!
2012 doing the same thing. Any update?

2012 2500HD LT Ext. Cab 4x4 LML
140,000
EFI Live PPEI
K&N Cold Air
5" SS Turbo back
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