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Where to find upgraded alternator?

Discussion in 'Chevy Trucks' started by GetMore, Oct 22, 2005.

  1. GetMore

    GetMore Senior Member
    Messages: 179

    I have the 105A alternator in my 2001 Silverado and I want to upgrade. I tried searching, but only found one link.
    So, where else should I look? I'm guessing that the 145A unit from the newer trucks should be sufficient.
    What have your experiences been?

  2. lawnmedic

    lawnmedic Senior Member
    Messages: 703

    Autozone.com has 124 and 145 amp alt. listed online. Some stores do not stock all units, but can be ordered online....
  3. sonjaab

    sonjaab PlowSite.com Addict
    Messages: 1,425

    GET............You could call around to a few local alternator rebuild
    shop(s) and ask if they can pump up your existing unit to 145 or so

    I wonder if you could just change the internal regulator (GM only)
    to make the 105 amp. unit pump out 145 amps....??????????

    Anybody know if it can be done ????????.................geo
  4. Garagekeeper

    Garagekeeper Senior Member
    Messages: 459

  5. sonjaab

    sonjaab PlowSite.com Addict
    Messages: 1,425

    Nice units.......BUT very $pendy !!!!!!!!!!!!!
  6. Detroitdan

    Detroitdan PlowSite.com Addict
    Messages: 1,937

    I had a Powermaster, it was great. For your application I would either go with a Powermaster or an AC Delco 145, but you might spend as much for a dealer part. My Powermaster was around $150 a few years back, dont know what they are now. I have learned to stay away from Autozone electronic parts. They use little 10 year old Jose in Mexico to rebuild them out in the shed behind the goat pen, and while Jose is a good boy I dont think he has the resources to make a good remanufactured electronic product. Seriously, I have bought starters, alternators and batteries from Autozone, VIP and Pepboys, and have always had failures. I finally smartened up and started buying AC Delco for electronics. The cheap parts places are good for many things, but I stay far away from Jose's remanufactered parts.
  7. lawnmedic

    lawnmedic Senior Member
    Messages: 703

    Actually the Duralast Gold series of alternators and starters are made near where I live. They are made with all new parts, and are also sold at the high priced auto parts shops under other names.
  8. Detroitdan

    Detroitdan PlowSite.com Addict
    Messages: 1,937

    Duralast Gold is the name of the ones that i have had an enormous amount of problems with. Sorry, due to the lousy quality of the stuff I bought, I just assumed it was made in some third world country. A full warranty is meaningless when you have to take the starter out seven times, not to mention the inconvenience of not having your vehicle start when you need it to. I let them replace it 5 times, counting the stock one thats 6, the 7th starter came off a junkyard truck about twenty years old, never touched it again. Maybe it was just me, or I got a bad batch. After all I only had problems with their alternators 2 or 3 times. I just bought a fuel pump from Autozone yesterday, they didnt have an AC Delco so I got the store brand "Master". What else could I do on a Sunday afternoon? It better be good, it was the same price and warranty as the Delco that they didnt have in stock.
  9. GetMore

    GetMore Senior Member
    Messages: 179

    What are the prices you usually see for something like the GM 145A alternator?
  10. GetMore

    GetMore Senior Member
    Messages: 179

    Well I've got a 145A GM unit on the way. It is listed as an '03-'05 unit. Does anyone know if there is a reason it will not fit an '01?
  11. sonjaab

    sonjaab PlowSite.com Addict
    Messages: 1,425

    GET.................the 140/145 amp units are huge ! Just eyeball your
    existing unit to see if the size is the same. If so you should be ok.

    I noted a reman NAPA unit on line was only $160 bucks..........geo:drinkup:
  12. corkireland

    corkireland Senior Member
    Messages: 129

    Maybe I'm ignorant to the amount of amp draw but maybe some of you could help me out. ON the new Chevy's and GMC half tons, the plow prep provides a 160 Amp alternator while on the 3/4 ton, the plow prep only provides only 145 Amp Alternator. I think its safe to assum that more 3/4 ton trucks will be used to plow then the half ton trucks. So why would they not try to adapt a version of the 160 amp alternator for the 6.0L and bigger trucks? Seemed like an appropriate time to post the question.
  13. GetMore

    GetMore Senior Member
    Messages: 179

    Cork, it may have something to do with the speeds the alternator gets spun at, but that's just a SWAG and I really don't know.

    As for my new alternator, it is physically larger than the stock unit, but the wiring looks to be the same and the bolt locations are the same, so I think it'll bolt right in. (Fingers crossed) The fact that it is larger means that it shouldn't be working harder to produce the extra power and its idle output should be good. (At least as far as I understand it.)
    I guess we'll see. If it doesn't work the way I think it should then I guess it'll be up for sale.
  14. justme-

    justme- 2000 Club Member
    Messages: 2,138

    It probabily has something to do with battery size. The half tons probabily have a significantly smaller battery Or a battery with no reserve time and the 2500's will have a bigger battery. Remember all manufacturer's consider 1500/half ton trucks as cars and 2500/3/4 ton as the smallest commercial truck. (even if they don't advertise it that way they usually design them and market them that way)

    Get is also onto something- if you;re talking diesel versus gas the diesel has significantly lower rpm in most cases so the same alt will not normally generate the same current overall.

    My replacement (auto parts store rebuild) was marketed as a 120AMP but has the testing cert label on it saying peak of 160AMPs. the stock for my Ram is a 135Amp being diesel and plow prep where the stock gas/non plow is 120.
  15. DugHD

    DugHD Senior Member
    from Maine
    Messages: 420

  16. GetMore

    GetMore Senior Member
    Messages: 179

    Well I got the new alternator installed today!
    I had to get a new belt, as the stock one for a 105A unit was too short. Other than that it was a direct bolt in.