Vibrations maybe bad motor mounts

[sctrl]

IMO, the left one is bad and the right one is weakening. Not as bad as left but will follow soon.

My 05 Z71 is having me go thru a bit of hell right now with the mounts replacing, see my build thread, but yours may have better access or worse. Others here with an 07 and newer will know.

Wow so your thread. Lots of work!
Basically time for me to replace both. Thanks.

 

[wsteele]

I have OBDLink MX+. No fault codes. Are you talking about real-time monitors?

Not the monitors, it generally can be found in something called like "Live Data". The misfire counts stored will be there by cylinder. Many might have some misfires, you are looking for the ones where the counts are way above others.

 

[OR VietVet]

While waiting to do the mounts, make sure to accel lighter than normal, in reverse or drive.

Start looking thru the threads for 2007 and newer mounts replacement and others will also chime in with opinions.

 

[donjetman]

Change both sides with H3 motor mount pt# 25847739

https://www.rockauto.com/en/moreinfo.php?pk=6437988&cc=1441263&jsn=865

Don't forget the tranny mount

 

[OR VietVet]

What @donjetman said about the trans mount. I forgot to recommend. Good call.

At RA: https://www.rockauto.com/en/moreinfo.php?pk=6437988&pt=5552&jsn=715 for $77.79 Plus shipping and use RA 5% discount code.

At RA: https://www.rockauto.com/en/moreinfo.php?pk=9353684&cc=1441039&pt=8616&jsn=966 for $20.79 Plus shipping and use RA 5% discount code.

At Amazon: https://www.amazon.com/ACDelco-2584...ild=1&keywords=25847739&qid=1625612474&sr=8-3 For $90.05

At Amazon: https://www.amazon.com/ACDelco-1581...ild=1&keywords=15813693&qid=1625612529&sr=8-3 for $33.79

 

[sctrl]

Thanks @PNW VietVet and @donjetman

Getting two of these H3 mounts

More Information for GM GENUINE 25847739

I think I need the mount for 6 speed trans since it's 6.2L, but it's $88 vs $20. Will the cheaper one from 4 speed fit 6 speed?

More Information for GM GENUINE 15854941

 

[OR VietVet]

I saw RWD and clicked on it and never thought of the 6 speed.

I have no idea if it will. Post the last 8 digits of your VIN and maybe @915_Tahoe will chime in with his great info on parts for the rigs here. Give him a little time and he will likely respond asap. He will know the correct number for the trans mount and then you or I can find at RA or Amazon. Patience will give you the best results.


I just now decided to take the updated engine info and looked at RA. The mount for the 6 speed trans and the 4 speed trans, RWD, shows the same number at RA for both. But I would let @915_Tahoe do his thing to be 100% for sure.

 

[sctrl]

I saw RWD and clicked on it and never thought of the 6 speed.

I have no idea if it will. Post the last 8 digits of your VIN and maybe @915_Tahoe will chime in with his great info on parts for the rigs here. Give him a little time and he will likely respond asap. He will know the correct number for the trans mount and then you or I can find at RA or Amazon. Patience will give you the best results.


I just now decided to take the updated engine info and looked at RA. The mount for the 6 speed trans and the 4 speed trans, RWD, shows the same number at RA for both. But I would let @915_Tahoe do his thing to be 100% for sure.

Sorry for the confusion. The link I posted was actually for the engine mount. I thought it was a tranny mount since it said in the description "RWD; 6 speed Automatic trans."
So everything is good, the tranny mount is the same on 4 speed and 6 speed, $20.
Thanks for your help, much appreciated.

 

[OR VietVet]

The good thing is that they are listed as Genuine GM parts.

Do yourself a favor and post your engine size in your signature for future reference.

 

[sctrl]

Not the monitors, it generally can be found in something called like "Live Data". The misfire counts stored will be there by cylinder. Many might have some misfires, you are looking for the ones where the counts are way above others.

I’m using OBDLink app and I couldn’t find Live Data or anything about misfires except in the emission test section where it has a check mark next to misfires.
I did ran the real time monitor and at idle RPM fluctuates between 600 and 670, saw 700 once. Is that ok? I can feel vibrations through break paddle when it goes through fluctuations.