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After talking with a GM tech, that seemed to know what he was talking about, he told me to put a trickle charger on my battery overnight, that most always when the check for updates is greyed out, that means the battery needs extra charging, and according to him, its a battery in one of the modules, not necessarily the main starting battery. I did this, and then took a 10 mile trip, and when I shifted to park in my garage the message popped up to install the update, which installed successfully. I still don't have a couple of the latest updates from what I've seen, but maybe they will install now at some point. -
Couple plausibilities. - Bent pushrod - Bad injector - Roller lifter failed and has been eating the cam lobe(s). - Broken valve spring All are options. Most common that I can recall would be the valve spring (hard to see the break on it as well), the cam/lifter and the injector. -
I only have a few of the ACDelco blue remaining. One or two of the (old, old) ACDelco Professional boxes, and a couple of the newer style GM boxes with the simulcast in Chinese along with English. FWIW they've all been pretty good, regardless of where they are made, and in 20 years I've never had a problem with an e-core filter. Now I have a couple of the "A" series in my home inventory. They come in a plain white box with the GM hologram sticker and model information. Have not installed one yet, want to use up my oldest inventory first. -
By asilverblazer · Posted
Compression test? Weird noises? Fuel trims?
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