u0121 u0100 u0101 help! - Chevy and GMC Duramax Diesel Forum
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post #1 of 3 (permalink) Old 08-06-2019, 10:18 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 3 (permalink) Old 08-06-2019, 12:03 PM
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Check the grounds, from engine to frame and all others.
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post #3 of 3 (permalink) Old 08-06-2019, 05:04 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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