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2006 gmc 2500 hd

captainjno
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captainjno New Member

captainjno

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Whats up, I have a 2006 gmc 2500 hd. I am getting a transmission high temp alarm with just the key switch on. The truck is never started and the alarm comes on and the gauage pegs out to 300 degrees. im hoping someone on here can give me a solution to this problem. Thanks in advance..

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Jglew82 Enthusiast

Jglew82

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Sounds like either you have a short to ground in your trans temp sensor or the signal wiring. Here's another guy that had the same issue. https://www.duramaxforum.com/forum/transmission-shop/987599-allison-her-naughty-temp-gauge.html

Edited by Jglew82
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