rusty503

I am thinking of using some shelf lining material. Some of the thicker type. I think I will also check craft stores to see what is available.

It would help if you list the issues you are having to help everyone to give you more meaningful answers or solutions.

The bulletin is dated July 6 of this year so before the 2021s.

There have been numerous posts about the same type of issues. One thing I keyed on was an issue with the bolts in the underhood fuse box not fully tightened. There is a TSB for the issue. It is for 2019 but I have seen posts about the issues on later models. Do a search. May not fix your issue but it is easy to check.

While I totally agree with you, I don't want to take a chance. Like a saying goes, an ounce of prevention is worth a pound of cure. Better safe than sorry.

I am trying to be proactive not reactive especially hundreds of miles from home in the early morning hours when no dealers are open.

There have been numerous posts about the loose bolts in the underhood fuse box causing crank but no start, cel popping up and other warnings. There is even a TSB on it. I just couldn't find the size of the bolts.

Thanks! I plan on checking that before I leave the lot.

I am about to buy a new 2021 Sierra next week. I will be going from NC to Dallas to pick it up and then drive back home. With the issues I have read about the fuse block bolts I want to be able to fix it myself before heading back for 1000 miles. What size are these bolts and do I need a short extension? I would really hate to be stuck in the middle of nowhere.

Try going to a local Home Depot, Lowes or some place like that to the hardware section. They should have a board or panel up that you can use to find the size and thread count. You could also try any auto parts place and try to match it up there.

Actually I would disconnect the ground cable at the battery for some minutes, hook it back up and check the window function. Other than that, it's time to check all of your fuses. Hooking those cables up backwards could have blown any number of fuses. Sent from my K007 using Tapatalk

Sounds like possible broken wires or worn insulation on some wires in the door jamb area. Pull back the rubber boot and inspect all of the wires. The open and close driver window message means that power and/or ground had been lost to the door. Even a short glitch will bring up that message.

It might help if you post this in the right section.

Sounds like you have a broken motor mount.

I have read of various strange problems happening not long after purchase. A lot of them were found to be the fasteners in the underhood fuse box not fully tightened. Do a search here for more information.

Sounds like a loose ground cable or corrosion at the battery. Take the cables off the battery, clean up the terminals and connect them back up making sure they are tightened up. Try again. If the problem crops up again, go to the cables and give them a good shake and try again. If it starts without a problem, you have bad cables most likely the ground cable. You also trace out the other ends looking for wherever it hooks up to. Disconnect the cable at that point and clean up that area to bare clean metal. You are trying to remove any corrosion. Please note that if you are messing with the positive cable REMOVE it from the battery before disconnecting the other ends. One of those ends will go to the starter so don't forget that one. Considering how old the truck is you should go ahead and replace at least the ground cable. Corrosion tends to build up under the insulation where you cannot see it. The terminals may look perfect but the cable still be bad.

That message means you lost power. Possible issues include bad ground(s), bad negative cable at the battery and possible broken wires in the door hinge area.

So? Are you asking for help or just bragging? If you want some help, then ask. All you did was make a statement. If you need help , we need details to give you any sort of help.

Some other thoughts here. The connectors under the fuse block in the engine bay may have corrosion and check the grounds for the ecm and bcm. Also check that the ecm and bcm connectors are fully seated. Maybe pull those connectors and check for corrosion then fully seat them.

Get that battery checked first. Keep in mind that you might have an intermittent in the battery. Something else to try is shaking the ground cable when you are having the problems(no start). Sounds like you do have a good head start.

Just about everything you list points to a ground issue. One big ground issue is corrosion build up INSIDE the ground cable usually at the battery. The cable may look great on the outside, but bad inside. Another clue you mentioned is moisture. Corrosion will affect an electrical system many many times worse than when dry. Another problem with the cable is bad crimps at the terminals. One ground point to check out are the ones at the forward left and right sides of the dash. I believe one is G218. I don't remember the other one. There are some videos on YouTube about them. You really should trust me on this. I have seen these type of issues here many times and in all or at least most cases it was a ground issue. The other times it ended up being the battery.

Did you look ABOVE the glovebox?

Got it. I hadn't looked at them that close.

Check out the eBay item I listed above.

Check out ebay item #182301959032. They have others too.