Recent content by Double0Redneck

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    Possible ground issue

    I'll look into this and see if I can detect a leak
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    Possible ground issue

    It has approximately 115K. It had just over 114K when it dropped the valve and it ran for about 10-15 seconds before it locked up. It's actually showing codes P0420 and P0430. Dropped valve was on #2 cylinder so I could see the possibility of an issue on the right bank, but not both banks at...
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    2016 Yukon Denali cam shaft issue

    You got lucky. At approximately the same time this year my 2015 broke a valve spring on #2 cylinder and dropped the intake valve. I ended up saving the crankshaft, 7 connecting rods and a set of heads. I had a local machine shop build a new DOD deleted short block and repair the damaged head. I...
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    Possible ground issue

    I may have to try that. I'm just not much on throwing parts at a problem in hopes that it cures it. Looking at live data, all 4 O2 sensors are reading voltage, from around 85mV to 900mV but it never goes into closed loop and the down stream sensors constantly fluctuate as fast as the upstream...
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    Possible ground issue

    Yes, those grounds are good. They were reconnected when I put the new engine in, along with the ground connected to the a/c compressor bracket and to the passenger side of the block just ahead of the starter.
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    Possible ground issue

    I did remove the bolt and checked the connectors for corrosion and replaced the bolt and tightened it down. I cleared the pending codes but have not driven it yet.
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    Possible ground issue

    Recently I had to do a complete engine build on a 2015 6.2 LT in a Yukon Denali for a broken valve spring resulting in a dropped valve. Since getting it back in the road I've had a few electrical gremlins. Mainly throwing a P0420 catalyst low efficiency code that wasn't there before the new...
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