I have a 96 Sierra 1500 4x4 5.7
Once in a while(about every 2 weeks) I have the following starting issue.
It starts fine, but once I go about 2 feet it dies.
I try to start it again, but no juice. It seems like there is a short somewhere.
I can turn the key to the on(not crank) position and the
lights on the dash flicker, the speedometer goes up to 30mph and I hear
a buzzing noise under the dash that sounds like when you have your door
open(but it's not that buzz). If I try to crank, nothing. It doesn't even
turn over.
After playing with it for about 10 minutes it will start again. I will try
everything. Fiddling with the connectors, shifting gears, pushing break
pedal. I don't know what exactly I did, but eventually it works again.
Sometimes it stalls right back out after going two feet other times it's
fine. It happens intermittently, sometimes in the morning or after I've
been driving for a while and stop somewhere and turn the engine off.

Example: one time I pushed the brake pedal a few times an shifted the
gears then it worked.
Last time I tried everything but it seemed like nothing worked. So I
pushed the horn button to see if it would work and it did, then it
started fine.

One time after this the radio died.(turn it on, no lights, no stations, the
casette wouldn't even go in, just hear static if i turn the volume all the way up)
I thought maybe it got shorted out.
I checked the fuses, all ok. Then recently I had the starting problem
again. When I finally got it started, the radio works fine.

The battery is newer, connections are good. Newer alternator(this happened
before the alternator was replaced too). All fuses seem to be good.

Any suggestions?

 

DUDE your truck is haunted. haha. No sounds like you might have a computer problem or there is some bad wireing somewhere.

 

So, do you want to buy a truck? Actually this weekend I'll be
inspecting every electrical connection I can find.

I would think if the computer was bad, it wouldn't run good.
When I finally do get it started, it runs great.

Thanks for you haunting input.

 

on the positve side of the battery there is lead washer between the two cables its a common problem. and now the shameless plug go to your local NAPA store and buy a new bolt and lead washer. the same thing happened to me and thats all it was.

 

What was wrong with your lead washer, I can see maybe the bolt
threads being stripped.
Heck, I'll try it. That's a cheap enough fix even if it doesn't work.

 

On the compuet issue, my cuzzin has a 93 GMC Cheyenne W/T and his truck does that. He replaced the computer because it got to the point wher e it wouldnt start at all. So he replaced the computer and it started right up. The only problem is, every time he shuts it off the computer fries. So he doesnt know what to do.

 

for some reason they get overly crushed with time the only thing i can think of is viberation maybe. the bolts usually carrode in half where you can't see them too. good luck and let us know when you get it figured out.
i had a 96 suburban that would start when it wanted too and a haunted radio replaced the washer and never had another problem