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Discussion Starter #1
2001 HD Duramax -
Got a:
P0700 - TCM, Malfunction
ND041 Unknown Fault

What is this and how do we fix it. I am guessing Transmission Control Malfunction?

Do you know how to reset codes on the Duramax. I tried with my gas Predator, it read the codes, thought I cleared them, but it won't go away. P0700 is still there.
 

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If it has any 0700 (generic trans code) it will most likely have another code. You need a good code reader so you don't just pull generic codes. Never seen/heard of that second code sounds like you are using a cheap/incompatible code reader.
 
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