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Engine hours zero'd out on 6.6L Duramax

FCFire410
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FCFire410 New Member

FCFire410

Posted
Posted

Has anybody ever heard of or has their engine hours zero out on their truck?  I have a 2020 GMC Sierra 2500HD AT4 w/ 6.6L Duramax.  This happened to me a couple months back.  I remote started my truck and it sounded like it hard cranked.  When I got in the my truck I noticed the engine hours were at 0, my fuel economy reset, and my instruments switched over to metric units.  No big deal on the fuel economy and I just switched the units back to US but, I was more concerned with the engine hours zeroing out.  Please let me know if this has happened and if a solution is possible.  The dealer has never heard of this happening.

 

Thanks,

Jake

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Another JR Senior Enthusiast

Another JR

Posted
Posted

Check your main battery ground connections to both the battery and the body. In 2020 there were threads about people having resets and other strange symptoms that were traced by the dealer to undertorqued ground connections. 

swathdiver Senior Enthusiast

swathdiver

Posted
Posted

This usually happens with weak or faulty batteries or loose cables causing intermittent shorts.  Mine reset when my daughter left the key on with the headlights, radio, AC, etc. going for an hour once.

 

Either the guy the dealership was hired last night or he's lying.  For many problems, GM instructs dealerships to say they've never ever heard of such and such problem before.

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