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    Driver side motor mount - how much movement is too much

    i added the new ground strap wire and ran the old one to a 2ndary location on block that was available (If 1 is good 2 must be better!). I removed the oval plug in the driver side rear door to help the door drain per @mikez71 . Hopefully these issues are behind me now. Thanks for all the advice!
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    Driver side motor mount - how much movement is too much

    I did not check this one but I cleaned both ends of the battery negative to engine block cable, the battery end of the positive to under hood fuse/relay panel, and both ends of the engine block to body flexible ground strap on driver's side under hood. It's been 5 trips with no issues. The...
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    Driver side motor mount - how much movement is too much

    I just ordered a replacement ground strap...
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    Driver side motor mount - how much movement is too much

    i think i will replace the battery negative cable to the engine block, since it seemed to have significant voltage drop (70% of allowable), and probably the block to body ground strap, which i would think should have like 0 resistance, out of abundance of caution...
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    Driver side motor mount - how much movement is too much

    So I checked and cleaned the battery cable to the uh I removed engine to chassis strap on driver's side and cleaned all contact surfaces. I measured the resistance from end to end while of the car at 0.1 ohms. I charged the battery and then took it for a short test drive... No issues so will...
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    Driver side motor mount - how much movement is too much

    Ummm, I just noticed something... my battery is 1yr old agm, but after cranking it to test the voltage drop last night, and noticing the battery voltage was a little low, i put it on charger this am... it read 12 v and 25% charge... could that be the actual root cause? I dont see how as the...
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    Driver side motor mount - how much movement is too much

    Battery cables looked good, i didn't test before per the SB, but i cleaned stuff around the mega fuse (there was no arcing), and post cleaning the voltage drops were < 200mV... negative to the block was reading 130 mV, positive to the underhood buss electrical center was 50mV during cranking w/...
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    Driver side motor mount - how much movement is too much

    I looked at that strap and it LOOKS ok... Maybe a little dusty. I did not check continuity yet... Tomorrow
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    Driver side motor mount - how much movement is too much

    Hopefully gonna try testing the cables from the battery today. One odd thing i have had is my driver side rear door fills up w/ water when it rains, i wonder if it can get high enough to have damaged something electrically ... windows and locks work fine so I think its low probability...
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    Driver side motor mount - how much movement is too much

    It's got chrome side mirrors, non standard suspension Thanks for sharing this. Spent this am looking, decided to run sister wires alongside the ones I pictured as I felt they were most likely. Did not solve the issue. I couldn't find anything else that looked suspicious. Beginning to wonder...
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    Driver side motor mount - how much movement is too much

    Can I run a sister wire alongside wires at sections that were stretched instead of replacing a whole harness (if it's $$$)?
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    Driver side motor mount - how much movement is too much

    It's got chrome side mirrors, non standard suspension Chrome details on side mirrors, grill, tail pipe; towing package, suspension upgrade, 20" polished aluminum wheels
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    Driver side motor mount - how much movement is too much

    Well, I'm afraid you were right. It came back again pulling the boat last weekend. This time the door locks all toggled lock-unlock continuously for a minute, the gages all swept back and forth, the transmission bucked...I pulled over and shut the vehicle off. After a minute I restarted it and...
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    Driver side motor mount - how much movement is too much

    I was worried that maybe damage is done and that fault might return... Fingers crossed, but I will look at it next time I get it on a lift..I will post pic of the wire near the mount if I remember :) how do I turn on notifications when someone replies or comments on my thread?
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    Driver side motor mount - how much movement is too much

    I did not. Battery was new AGM in 2024 and I cleaned contacts then. There is a wire harness on the bottom of the engine that runs close to drivers motor mount and it did look a little contorted. I will have vehicle on a lift at the end of the month to replace shocks and struts, and will look...
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    Driver side motor mount - how much movement is too much

    3 hrs driving after replacing motor mount, including 2hrs pulling my boat, and seems the problem is solved. Thanks to the AutoZone sales person for the tip!
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    Driver side motor mount - how much movement is too much

    The engine was moving 2+ inches acceling in drive with foot on the brake. No such movement in reverse. Removed drivers mount last night (PIA!), confirmed the mount failed. Will update effect on electrical issues after I drive it a while. Fault codes were b2555 passenger compartment lamp...
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    Driver side motor mount - how much movement is too much

    How much should this mount allow the engine to move? Mine seems excessive and I think it might be causing intermittent electrical issues in a wiring harness, leading to a bunch of electrical faults that seem to occur when engine acceleration causes the engine to move. 2013 Yukon SLT 5.3 TEXAS...

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