2005 impala not starting

I have a 05 Impala, 3.4 L. On occasion it just won't crank. I thought my battery was bad, replaced that. No problem for about a week. It happened this past weekend again. When the key is turned to start, everything goes out, no power anywhere. Boasting doesn't work. Its all the info I have at the moment. Can somebody help me to look for the problem?? Thank you for your time.

Sounds like a bad battery ground connection.

Sounds like a bad battery ground connection.

I checked the ground connection, it seems ok. Do you have any other suggestions please? Thanks for your time

If you have no lites then you have a bad main connection somewhere from the battery to the power dist. center, has to be.

If you have no lites then you have a bad main connection somewhere from the battery to the power dist. center, has to be.

Thanks for your time, I'll check that out. Haven't had any problem since Saturday, thank god. I did notice that there was some corrosion on a terminal near the fuse panel under the hood. Is this the area you are talking about?? Thanks again.

One possibility, but any bad connection on the ground side from the battery or the same holds for the main input cable also.

One possibility, but any bad connection on the ground side from the battery or the same holds for the main input cable also.

Again I thank you for your time. After tomorrow i am off work for the weekend. I will take things apart to see what I can find. I appreciate your help very much. All the best to you. I will let you know how I make out in order to help any others who may develop a similar problem.

One possibility, but any bad connection on the ground side from the battery or the same holds for the main input cable also.

Good day to you,
I have a question please. I am still having the problem, after cleaning everything up, and replacing the corroded connector on the battery side. The ground leads to the chassis and the engine look good. I have been having this problem while the car is parked on the level. When parking on a grade, I haven't had it that I have noticed anyway. Would the oil level switch cause this problem? While trying to get the car going today, I pulled the dipstick, and saw she was just below add. I filled her with oil, and got in the car and away she went. Does this switch shut off the fuel as well as not letting her start? I crossed her out on the starter and she cranked over but wouldn't start, not until I added oil, then she started with the key anyway. It remains to be seen if this is the problem.....till the next time....i hope not!!!!! Thank you for your time.

QUESTION......

Do you see the security light on?

Does the dash lights come on and go out when you try to start her up?

Cleaning grounds is great but you may have a bad BCM too.

Tell us what you find.

John:grinno: