2500HD 8.1 liter
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Joined: Oct 2007
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From: Dayton PA
RE: 2500HD 8.1 liter
It maybe the gauge, some of those years around yours had a service bulletin put out to extend the warranty of the gauges to cover the defects.Read this post, https://chevroletforum.com/m_24024/tm.htm
CF Junior Member
Joined: Mar 2008
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RE: 2500HD 8.1 liter
it very well could be a gauge, it also very well cold be a connection at the gauge. just make sure that there is oil in it cz the 8.1 liter is known for burning oil even when new. i got 67000+ on mine it burns about a quart every 1600 miles or so. but if the compter does not send a message then the sensor is obviously working.
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