I have a 99 chevy blazer two wheel drive with the 4.3 vtec and is a four door.. The problem is that it dies as I'm drivin but before the battery light comes on.. This happens to me whenevers could be two days in a row or once a month it happens unexpectanly.ive gotten my battery tested alternator and both are in great working order. I was told it could be the computer but dont wanna spend the money on it if thats not the problem. Ive also replaces all battery cables to make sure and still happens. The only way to get it started and able to drive it is to let it sit till the battery drains completely and then jump it and itll be good. If anyone could give me any pointers it would be much aprecciated. Thankx.

 

I had a car that did that..and I found out the torc convertor sensor on the trann was bad replaced it and no problem since I don't know if your car has one..have you ever put on a dianosgtic machine..or take it AutoZone..they check it for free..hope this helps good luck

 

sounds like you have a control module issue. would be nice to know the milage. but need more info and be specific when you say it dies. does it crank. click ?? im assuming vortec motor rite? sorry see that you did say was vortec, these motors are almost bullet proof and run really well, depending on milage....so first tell me the specifics on after it dies then lets go from there

 

Did you happen to put a super chip in?

 

I dont have a chip on it just stock... I was told it could be the ecm but not sure... And it had 175xxx miles on it.... I had the dealership check it out and they said it was my alternator but then I get it tested and test fine. And the was it dies is like my bari dies... When I jump it starts fine and everything but holds no charge....

 

Holds no charge till like 2 hours later when I jump it then its fine...

 

How's the engine to firewall ground strap?

You'll have trouble getting dependable charging without it. Also your charging wire from your alternator.

The engine to firewall ground strap is usually in a hard to reach spot, just add a #4 negative cable with 2 standard bolt ends at the engine block or head, and any nut or bolt on your firewall.

 

Hi i have a 01 blazer had same problem infact twice the first time it was the postive wirte where it conects to the battery under the red boot/cover it caroded so i just cut the cover off and cleaned it it worked then later down the line same thing except this time the battery i bought was to small of a cranking amps even tho its the battery the parts store said it called for good luck love the truck hate to work on them