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Old 01-31-2013, 06:08 PM   #1
ap2002
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Alternator help

I can't seem to find the replacement alternator for my 71c10. Truck has a 454 BB block out of a 89-90 silverado. Here is the kicker, truck has serpentine belt but auto parts can't seem to find a matching alternator for it. Either they find the right alternator with the correct plug but the then the pulley is a v-belt.. The alternator that is on right now is part# 1100264, when I go online it also has a v-belt and not the serpentine pulley. Do y'all think pulley was changed on alternator and that's why I can't find right one? Thanks for the help
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Old 01-31-2013, 06:15 PM   #2
Ol Blue K20
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Re: Alternator help

Yep, swap the pully
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Old 01-31-2013, 06:15 PM   #3
tex_waco_usmc
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Re: Alternator help

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Originally Posted by ap2002 View Post
I can't seem to find the replacement alternator for my 71c10. Truck has a 454 BB block out of a 89-90 silverado. Here is the kicker, truck has serpentine belt but auto parts can't seem to find a matching alternator for it. Either they find the right alternator with the correct plug but the then the pulley is a v-belt.. The alternator that is on right now is part# 1100264, when I go online it also has a v-belt and not the serpentine pulley. Do y'all think pulley was changed on alternator and that's why I can't find right one? Thanks for the help
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Pop and Swap the pulley between the two alternators!
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Old 01-31-2013, 06:31 PM   #4
68gmsee
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Re: Alternator help

Can you compare with one that has the serpentine belt pulley to see if it's the same? Try NAPA or Carquest if you have one in your area. They seem to have more knowledgeable people that can help you out.

If you already bought it and it has the pressed on pulley, you can rent the tool at Autozone or if you think you will do it again in the future, buy the tool kit for $20-$30.
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Old 01-31-2013, 06:33 PM   #5
ap2002
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Re: Alternator help

Ok thanks, I didn't know it was ok to swap pulleys, I'll try that
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Old 01-31-2013, 08:03 PM   #6
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Re: Alternator help

I have that same set up (88-90) on my 76 Monte (383). I don't remember having to change the pulley as I used everything off the donor truck. But a pulley change should do the trick.
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Old 01-31-2013, 08:36 PM   #7
ap2002
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Re: Alternator help

Is there any DIY online? Can't seem to find any
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Old 01-31-2013, 08:57 PM   #8
68gmsee
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Re: Alternator help

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Is there any DIY online? Can't seem to find any
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Are you referring to the pulley removal? Several years ago, the place I bought an alternator from swapped it out for me. Took them all of about 10 minutes.

If you have an impact wrench it works a lot better if you have one otherwise any shop can do it for you.
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