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I have a 2003 Silverado Extended Cab LS, 4.8, auto, with 97,600 miles. All the miles are mine, highway, and truck has been very well taken care of. I decided to go buy a new battery, and take my GM OEM, and put it in my wife's van which needed one. So I looked up the specs, and went to Sears and bought the top of the line Die Hard, 700 CCA, with 3 year replacement, 100 month warranty. So I brought the new battery home, installed it, cranked up the truck to test it out, and everything is good....I thought. Later that day I take the truck out, and it starts stalling, and even died a couple of times. This had never happened before. I remembered hearing something about the computer being reset. Can anybody help me with this? The only changes in the trucks configuration was the battery change. Would appreciate any and all help on this one.

torp
 

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Ok, found the answer. Changing the battery resests the computer. To restart it you have to touch the 2 cables together, hook them up to the battery. Then put in your key, turn to the start position, but don't start the truck! Let it go through all the lights blinking and all that crap. after it checks everything out, then crank the truck and let it idle for 5 minutes. It will really act weird for a few minutes, then it will smooth right out. Was told about this by a GM Tech, and it worked 1st time.

torp
 

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Do i have to do that reset procedure if all i did was pull the negative cable for 30 minutes?
the PCM will hold power and memory for a good amount of time with a loss of battery voltage perhaps 1 hr. but this depends on many factors with what you vehicle has installed and plugged in to the 12 volt power .

this summer I just went through the idle issue with the battery removed for a few hours . when you start engine have foot on throttle hold down so that it revs to 2K then very slowly reduce RPM. then it will adjust to the correct idle RPM.. it may stall a few times then set correctly. when this happens it will also cause all the codes set to clear and the PCM will not have most all of the required emissions testing completed .
 

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Really the proper way to change a battery or do ANY electrical work on modern day vehicles is to use a memory retainer. 9V battery with a a jumper to the ALDL. Some new vehicles will not restart if this is not used until a reprogram is done to vehicle. Follow the Service Manual on even a battery change due to the large amount of electronics.
 

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Really the proper way to change a battery or do ANY electrical work on modern day vehicles is to use a memory retainer. 9V battery with a a jumper to the ALDL. Some new vehicles will not restart if this is not used until a reprogram is done to vehicle. Follow the Service Manual on even a battery change due to the large amount of electronics.

what you say is true on BMW vehicles .
 

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the same exact thing happened to me when my "new" battery failed and had to be warranty exchanged. When the 2nd new battery went in, the truck would stutter sputter and stall at low speeds, I had to pull over turn the truck off and let it warm up to closed loop (fully warm, about 15-20 when standing still) then it started acting right.

usually I would just baby the truck until it was warm but it would die so I had to let it sit and wait until fully warm try this and see if it fixes your issue, if not post back
 
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