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temperature gauge works intermittantly

cwh

By cwh
in 2000-2014 Silverado HD & Sierra HD

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cwh Enthusiast

cwh

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Here is the question of the day. 2002 Chevy duramax 4x4 crewcab. My temperature gauge works intermittantly. When it registers normal engine temp everything is ok. The gauge will drop to nil and the truck will start to downshift extremely hard. Then the gauge starts functioning again and no abnormal shifting. I just brought it to the local gm dealership for the 3rd time. 1st time they replaced the temp sender unit. 2nd time a code was set and they replaced the ecm. Another tidbit is that it worked great for a month and then problems. Anybody else have this problem?

Thanks in advance,

Chris Harding

  • 1 month later...
cwh Enthusiast

cwh

Posted
  • Author
Posted
Here is the question of the day. 2002 Chevy duramax 4x4 crewcab.  My temperature gauge works intermittantly. When it registers normal engine temp everything is ok. The gauge will drop to nil and the truck will start to downshift extremely hard. Then the gauge starts functioning again and no abnormal shifting. I just brought it to the local gm dealership for the 3rd time. 1st time they replaced the temp sender unit. 2nd time a code was set and they replaced the ecm. Another tidbit is that it worked great for a month and then problems. Anybody else have this problem?

Thanks in advance,

Chris Harding

 

 

 

 

Just an update for those that are curious of the repairs needed. The dealer repaired some wiring feeding the temperature sender unit. It fixed most of the hard downshifting problems as well. The rest of the downshifting issues were resolved after the carrier bearing was replaced. The rubber was all tore up and exagerated the downshift. Runs and drives like a champ. I did have an issue with my aftermarket Lithia warranty though. They didn't want to warranty the carrier bearing issue even though it showed as a covered item on my paperwork. In the end I won. Just my two cents. cwh

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