99 Suburban Will Not Start After Replacing Dead Batts.

Chevyjet52 · July 1, 2008

Here's the situation:

My 99 1500 Suburban has been parked for 3 weeks. I left the interior lights on which killed both the batteries. I guessing they might have lasted for about a week which means the Suburban probably sat there for a couple of weeks with completely dead batteries.

I replaced the batteries and now it will not stay running. It cranks up and runs for about a second then dies.

I'm thinking it might have something to do with the passlock system, but the security light is not lit up.

What could this be?

$20 thru PayPal for the first person to figure this out.

Wingnut · July 1, 2008

Fuel pump?

Rodents-n-wires?

Chevyjet52 · July 1, 2008

Fuel pump?

Rodents-n-wires?

I can hear the fuel pump come on for a few seconds. Besides, it was replaced 10,000 miles ago. I truly believe this has everything to do with the batteries being dead for a few weeks. The Suburban was in perfect condition the last day I drove it.

Chevyjet52 · July 1, 2008

I went thru the rel-learn procedure about 5 times and it worked.

98silvz71 · July 1, 2008

I was thinking that was it. That long without power made the computer forget what it in. Glad you got it fixed.

Chevyjet52 · July 2, 2008

I was thinking that was it. That long without power made the computer forget what it in. Glad you got it fixed.

You should have said so earlier, you'd be $20 richer.

98silvz71 · July 2, 2008

I just had read it when you posted your findings. I wouldn't have let you send me $20 anyway. Thats what we are here for. To help eachother out with any problems.

shooters101 · July 6, 2008

I went thru the rel-learn procedure about 5 times and it worked.

I am having the same problem with my 2004 Chevrolet. The battery was down for about two weeks. It will crank up now that I have a new battery but when you put it in gear it dies. I was going to have it towed in and looked out when I started thinking it has to be some kind of security thing. What is the re-learn procedure? I wonder if it will work. I hate to drop the money to tow it in and have them laugh at and charge me $200 more for some simple thing.

Thanks

Pete

C6Racer · July 8, 2008

This applies to ALL computer controlled vehicles on the road. When you let it sit with a completely dead battery the PCM will forget what to do.

I've had this issue with my truck several times simply because of a loose negative battery cable. When I went to start it, the starter solenoid would engage the drive pinion with a loud pop then I would lose all power. I popped the hood and tightened up the cable. Because the starter drained every last capacitor on the truck, the PCM's memory was lost. Whenever this happens I just start up my truck and use my foot to keep the engine going for AT LEAST 5 mins. After that, I put it into gear, and using two feet, I keep my foot SLIGHTLY on the gas to keep it from stalling while the other is obviously on the brake pedal. I then drive off and it runs as if nothing ever happened. The engine might idle a bit lower than normal but, the problem goes away gradually.

That, my friends, is how the "re-learn" process works.