Alternator Question?

[Rugerlab]

Hello all, I have been reading this forum for a while now and finally decided to post something. Truck wouldn't start tonight just made a clicking noise when i turned it over. Starter sounds like its working. I thought it was the battery cause when i looked at the positive terminal it was leaking so got a new optima and put it in tonight and still nothin. So alternator.... how do i figure out what alternator i have? Its a 99 chevy ls z71 with a 5.3. any help would be great and if you need more info let me know. Thanks Eric

[BlenderWizard]

probably just the standard 105 Amp

[jethro_3]

Look on the casing there are numbers stamped into it. You'll more than likely find the "105" next ot the center line where the two halves meet....

[Rugerlab]

I can't find anything stamped into it. Would it be on the underside (the alternator is still installed in the truck) cause theres nothing on the parts i can see

[jethro_3]

Real small pings in the shape of the letters, like 8 ping marks to make a straight line. Take a rag with cleaner to the casing, it's near the casing halves on top. Shine a light from the side it will show up better..... Climb in, the engine is calling you... Joke

[Rugerlab]

ok after a cleaning i found this printed on it 10460229 and below that 6269A 12V N or something very close to that but still no 105 or 130? Does this mean anything

[2000CAYukon]

Originally Posted by Rugerlab

ok after a cleaning i found this printed on it 10460229 and below that 6269A 12V N or something very close to that but still no 105 or 130? Does this mean anything

www.acdelco.com lists that as a 105 AMP. Reman'd ac delco number is 321-1798.

//2000CAYukon

[Tall]

The alternator wont keep ur truck from starting.... unless the battery is dead. But since u dropped a new battery in, thats not ur problem.

[jers99z]

Have you tried cleaning the ground and power cables that run from your battery to your starter. I had a problem with corrosion in one of my cables and my truck acted real messed up. It didnt want to stay running then, I just couldnt get it started anymore. Cleaned cables and tightened them good and the truck was good as new.

[jers99z]

oh one other thing, i went through 3 batteries trying to figure out what the hell was wrong. Everytime i would almost start the truck it would drain the battery, the truck wouldnt even start off a jump. I dont know if you are having symptoms like this but hey its a place to look.

[Rugerlab]

Thanks to all that helped, got a new alternator today and everything is running great. Turned out the ac delco battery i had was natorious for leaking acid on the positive terminal. So stay away from those batterys. I had to replace the positive cable completely it was so coroded from the crappy battery. New optima battery and new alternator and about $375 down the drain and the truck runs like new again.