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Old 06-17-2013, 12:30 PM   #1
Loonylani
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Join Date: Nov 2008
Location: Morgantown, West Virginia
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2007 Yukon XL speedometer needle jumps in park. Clicking sound down by E-brake pedal.

I have a 2007 GMC Yukon 60k miles and it seems to have a mind of it's own. When it's in park it idles rough and the speedometer needle jumps up to 15mhp and drops randomly. When it is doing this, there is a relay sounding click around the pedals under the dash. Close to the e-brake pedal. Any ideas what to check?
Also when driving down the road the locks lock and unlock really fast for about 5 seconds. I think that's something different.
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