400-12478 Alternator for Buick Rainier 2004-2006 AD244 HO
400-12478 Alternator for Buick Rainier 2004-2006 AD244 HO
400-12478 Alternator for Buick Rainier 2004-2006 AD244 HO
400-12478 Alternator for Buick Rainier 2004-2006 AD244 HO
400-12478 Alternator for Buick Rainier 2004-2006 AD244 HO
400-12478 Alternator for Buick Rainier 2004-2006 AD244 HO
400-12478 Alternator for Buick Rainier 2004-2006 AD244 HO

400-12478 Alternator for Buick Rainier 2004-2006 AD244 HO

Item #: 400-12478

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DB Electrical alternators are highly engineered for excellence in performance.
  • Built to Beat the Heat: High temperature epoxy and high temperature grease withstand extreme heat
  • Heavy-duty rectifiers and high-quality regulators enhance superior charging performance
  • Most alternators are supplied with final test results and performance curve
  • Direct-fit replacement and easy installation made possible with OEM fitment specifications
  • Factory direct, money-saving alternator typically priced substantially less than OEM counterparts
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  • Product Info
  • Applications List
  • Part Replacement List
  • Policy Information
  • Reviews

Overview

DB Electrical Alternators
DB Electrical keeps vehicles of every shape and size moving forward – from mowers, motorcycles and ATVs to automobiles, tractors, pickups and large commercial trucks. We work directly with factories to ensure each component is manufactured to our exacting quality control standards. But because there is no middleman, we can offer these exceptional-quality electrical components at low factory direct prices.

With DB Electrical alternators, you’ll get …

  • Superior Quality Every Time – Our aftermarket alternators deliver performance that’s equivalent to the original.
  • Direct-Fit OEM Replacement Parts – DB Electrical aftermarket alternators are designed for perfect fitment to replace the ones that originally came with your vehicle.
  • Engineer-Tested Excellence – Our alternators go through a rigorous testing program to ensure optimal performance. Most alternators are supplied with their final test results and performance curve.

Reasons to choose DB Electrical for your next alternator:

  • Built to Take the Heat – Most DB Electrical alternators offer high-temperature epoxy, heavy-duty rectifiers, high-quality regulators, top-quality bearings and high-temperature grease for better charging and longer life under high-heat environments.
  • Depth of Inventory – Find both common and hard-to-find alternators for virtually any type of vehicle to travel over road, trail or water.
  • Brand New Alternator – Never settle for a secondhand one. Many places will try to sell you a used alternator for about the price we’ll sell you a new one.

The DB Electrical Advantage – 1-Year Warranty
DB Electrical delivers exceptional value for products that we stand behind with our total-confidence 1-year warranty. Yes, you have a full year to make sure your alternator meets your expectations.

Item Number: 400-12478

100% Brand New Aftermarket Part From DB Electrical

Product Specs

Item ConditionAftermarket Part
Unit TypeAlternator
Voltage12
RotationCW
Amperage250
Clock12
Pulley ClassS6
RegulatorIR
Fan TypeIF

Applications List

Select Make & Type
MAKE TYPE MODEL YEAR ENGINE
BuickAuto and Light TruckRainier20045.3L
BuickAuto and Light TruckRainier20055.3L
BuickAuto and Light TruckRainier20065.3L
CadillacAuto and Light TruckEscalade ESV20036.0L
CadillacAuto and Light TruckEscalade ESV20046.0L
CadillacAuto and Light TruckEscalade EXT20036.0L
CadillacAuto and Light TruckEscalade EXT20046.0L
CadillacAuto and Light TruckEscalade20035.3L
CadillacAuto and Light TruckEscalade20036.0L
CadillacAuto and Light TruckEscalade20045.3L
CadillacAuto and Light TruckEscalade20046.0L
CadillacAuto and Light TruckEscalade20056.0L
ChevroletAuto and Light TruckAvalanche 150020035.3L
ChevroletAuto and Light TruckAvalanche 150020045.3L
ChevroletAuto and Light TruckAvalanche 250020038.1L
ChevroletAuto and Light TruckAvalanche 250020048.1L
ChevroletAuto and Light TruckAvalanche 250020058.1L
ChevroletAuto and Light TruckAvalanche 250020068.1L
ChevroletAuto and Light TruckAvalanche20075.3L
ChevroletAuto and Light TruckAvalanche20085.3L
ChevroletAuto and Light TruckAvalanche20095.3L
ChevroletAuto and Light TruckAvalanche20105.3L
ChevroletAuto and Light TruckAvalanche20115.3L
ChevroletAuto and Light TruckAvalanche20125.3L
ChevroletAuto and Light TruckAvalanche20135.3L
ChevroletAuto and Light TruckExpress 150020034.3L
ChevroletAuto and Light TruckExpress 150020035.3L
ChevroletAuto and Light TruckExpress 150020044.3L
ChevroletAuto and Light TruckExpress 150020045.3L
ChevroletAuto and Light TruckExpress 150020054.3L
ChevroletAuto and Light TruckExpress 150020055.3L
ChevroletAuto and Light TruckExpress 150020064.3L
ChevroletAuto and Light TruckExpress 150020065.3L
ChevroletAuto and Light TruckExpress 150020074.3L
ChevroletAuto and Light TruckExpress 150020075.3L
ChevroletAuto and Light TruckExpress 250020034.3L
ChevroletAuto and Light TruckExpress 250020034.8L
ChevroletAuto and Light TruckExpress 250020035.3L
ChevroletAuto and Light TruckExpress 250020036.0L
ChevroletAuto and Light TruckExpress 250020044.3L
ChevroletAuto and Light TruckExpress 250020044.8L
ChevroletAuto and Light TruckExpress 250020045.3L
ChevroletAuto and Light TruckExpress 250020046.0L
ChevroletAuto and Light TruckExpress 250020054.3L
ChevroletAuto and Light TruckExpress 250020054.8L
ChevroletAuto and Light TruckExpress 250020055.3L
ChevroletAuto and Light TruckExpress 250020056.0L
ChevroletAuto and Light TruckExpress 250020064.8L
ChevroletAuto and Light TruckExpress 250020066.0L
ChevroletAuto and Light TruckExpress 250020066.6L
ChevroletAuto and Light TruckExpress 250020074.8L
ChevroletAuto and Light TruckExpress 250020076.0L
ChevroletAuto and Light TruckExpress 250020076.6L
ChevroletAuto and Light TruckExpress 250020104.8L
ChevroletAuto and Light TruckExpress 250020106.0L
ChevroletAuto and Light TruckExpress 250020106.6L
ChevroletAuto and Light TruckExpress 350020034.8L
ChevroletAuto and Light TruckExpress 350020035.3L
ChevroletAuto and Light TruckExpress 350020036.0L
ChevroletAuto and Light TruckExpress 350020044.8L
ChevroletAuto and Light TruckExpress 350020045.3L
ChevroletAuto and Light TruckExpress 350020046.0L
ChevroletAuto and Light TruckExpress 350020054.8L
ChevroletAuto and Light TruckExpress 350020055.3L
ChevroletAuto and Light TruckExpress 350020056.0L
ChevroletAuto and Light TruckExpress 350020064.8L
ChevroletAuto and Light TruckExpress 350020065.3L
ChevroletAuto and Light TruckExpress 350020066.0L
ChevroletAuto and Light TruckExpress 350020066.6L
ChevroletAuto and Light TruckExpress 350020074.8L
ChevroletAuto and Light TruckExpress 350020075.3L
ChevroletAuto and Light TruckExpress 350020076.0L
ChevroletAuto and Light TruckExpress 350020076.6L
ChevroletAuto and Light TruckExpress 350020104.8L
ChevroletAuto and Light TruckExpress 350020106.0L
ChevroletAuto and Light TruckExpress 350020106.6L
ChevroletAuto and Light TruckExpress Cargo20106.0L
ChevroletAuto and Light TruckExpress Pasajeros20106.0L
ChevroletAuto and Light TruckSilverado 1500 Classic20076.0L
ChevroletAuto and Light TruckSilverado 1500 HD20036.0L
ChevroletAuto and Light TruckSilverado 1500 HD20056.0L
ChevroletAuto and Light TruckSilverado 150020034.3L
ChevroletAuto and Light TruckSilverado 150020034.8L
ChevroletAuto and Light TruckSilverado 150020035.3L
ChevroletAuto and Light TruckSilverado 150020036.0L
ChevroletAuto and Light TruckSilverado 150020044.3L
ChevroletAuto and Light TruckSilverado 150020044.8L
ChevroletAuto and Light TruckSilverado 150020045.3L
ChevroletAuto and Light TruckSilverado 150020046.0L
ChevroletAuto and Light TruckSilverado 150020056.0L
ChevroletAuto and Light TruckSilverado 150020066.0L
ChevroletAuto and Light TruckSilverado 2500 HD Classic20076.0L
ChevroletAuto and Light TruckSilverado 2500 HD Classic20078.1L
ChevroletAuto and Light TruckSilverado 2500 HD20036.0L
ChevroletAuto and Light TruckSilverado 2500 HD20036.6L
ChevroletAuto and Light TruckSilverado 2500 HD20038.1L
ChevroletAuto and Light TruckSilverado 2500 HD20046.0L
ChevroletAuto and Light TruckSilverado 2500 HD20046.6L
ChevroletAuto and Light TruckSilverado 2500 HD20048.1L
ChevroletAuto and Light TruckSilverado 2500 HD20056.0L
ChevroletAuto and Light TruckSilverado 2500 HD20056.6L
ChevroletAuto and Light TruckSilverado 2500 HD20058.1L
ChevroletAuto and Light TruckSilverado 2500 HD20066.0L
ChevroletAuto and Light TruckSilverado 2500 HD20068.1L
ChevroletAuto and Light TruckSilverado 250020036.0L
ChevroletAuto and Light TruckSilverado 250020046.0L
ChevroletAuto and Light TruckSilverado 3500 Classic20076.0L
ChevroletAuto and Light TruckSilverado 3500 Classic20078.1L
ChevroletAuto and Light TruckSilverado 3500 HD20076.0L
ChevroletAuto and Light TruckSilverado 350020036.0L
ChevroletAuto and Light TruckSilverado 350020036.6L
ChevroletAuto and Light TruckSilverado 350020038.1L
ChevroletAuto and Light TruckSilverado 350020046.0L
ChevroletAuto and Light TruckSilverado 350020046.6L
ChevroletAuto and Light TruckSilverado 350020048.1L
ChevroletAuto and Light TruckSilverado 350020056.0L
ChevroletAuto and Light TruckSilverado 350020056.6L
ChevroletAuto and Light TruckSilverado 350020058.1L
ChevroletAuto and Light TruckSilverado 350020066.0L
ChevroletAuto and Light TruckSilverado 350020066.6L
ChevroletAuto and Light TruckSilverado 350020068.1L
ChevroletAuto and Light TruckSSR20035.3L
ChevroletAuto and Light TruckSSR20045.3L
ChevroletAuto and Light TruckSSR20056.0L
ChevroletAuto and Light TruckSuburban 150020035.3L
ChevroletAuto and Light TruckSuburban 150020045.3L
ChevroletAuto and Light TruckSuburban 150020066.0L
ChevroletAuto and Light TruckSuburban 250020036.0L
ChevroletAuto and Light TruckSuburban 250020038.1L
ChevroletAuto and Light TruckSuburban 250020046.0L
ChevroletAuto and Light TruckSuburban 250020048.1L
ChevroletAuto and Light TruckSuburban 250020056.0L
ChevroletAuto and Light TruckSuburban 250020058.1L
ChevroletAuto and Light TruckSuburban 250020066.0L
ChevroletAuto and Light TruckSuburban 250020068.1L
ChevroletAuto and Light TruckSuburban19665.3L
ChevroletAuto and Light TruckTahoe20034.8L
ChevroletAuto and Light TruckTahoe20035.3L
ChevroletAuto and Light TruckTahoe20044.8L
ChevroletAuto and Light TruckTahoe20045.3L
ChevroletAuto and Light TruckTrailblazer EXT20035.3L
ChevroletAuto and Light TruckTrailblazer EXT20045.3L
ChevroletAuto and Light TruckTrailblazer EXT20055.3L
ChevroletAuto and Light TruckTrailblazer20065.3L
GMCAuto and Light TruckEnvoy XL20035.3L
GMCAuto and Light TruckEnvoy XL20045.3L
GMCAuto and Light TruckEnvoy XL20055.3L
GMCAuto and Light TruckEnvoy XUV20045.3L
GMCAuto and Light TruckEnvoy XUV20055.3L
GMCAuto and Light TruckEnvoy20055.3L
GMCAuto and Light TruckEnvoy20065.3L
GMCAuto and Light TruckSavana 150020034.3L
GMCAuto and Light TruckSavana 150020035.3L
GMCAuto and Light TruckSavana 150020044.3L
GMCAuto and Light TruckSavana 150020045.3L
GMCAuto and Light TruckSavana 150020054.3L
GMCAuto and Light TruckSavana 150020064.3L
GMCAuto and Light TruckSavana 150020074.3L
GMCAuto and Light TruckSavana 250020034.3L
GMCAuto and Light TruckSavana 250020034.8L
GMCAuto and Light TruckSavana 250020035.3L
GMCAuto and Light TruckSavana 250020036.0L
GMCAuto and Light TruckSavana 250020044.3L
GMCAuto and Light TruckSavana 250020044.8L
GMCAuto and Light TruckSavana 250020045.3L
GMCAuto and Light TruckSavana 250020046.0L
GMCAuto and Light TruckSavana 250020054.3L
GMCAuto and Light TruckSavana 250020054.8L
GMCAuto and Light TruckSavana 250020055.3L
GMCAuto and Light TruckSavana 250020056.0L
GMCAuto and Light TruckSavana 250020064.8L
GMCAuto and Light TruckSavana 250020066.0L
GMCAuto and Light TruckSavana 250020066.6L
GMCAuto and Light TruckSavana 250020074.8L
GMCAuto and Light TruckSavana 250020076.0L
GMCAuto and Light TruckSavana 250020076.6L
GMCAuto and Light TruckSavana 250020104.8L
GMCAuto and Light TruckSavana 250020106.0L
GMCAuto and Light TruckSavana 250020106.6L
GMCAuto and Light TruckSavana 350020034.8L
GMCAuto and Light TruckSavana 350020036.0L
GMCAuto and Light TruckSavana 350020044.8L
GMCAuto and Light TruckSavana 350020046.0L
GMCAuto and Light TruckSavana 350020054.8L
GMCAuto and Light TruckSavana 350020056.0L
GMCAuto and Light TruckSavana 350020064.8L
GMCAuto and Light TruckSavana 350020066.0L
GMCAuto and Light TruckSavana 350020066.6L
GMCAuto and Light TruckSavana 350020074.8L
GMCAuto and Light TruckSavana 350020076.0L
GMCAuto and Light TruckSavana 350020076.6L
GMCAuto and Light TruckSavana 350020104.8L
GMCAuto and Light TruckSavana 350020106.0L
GMCAuto and Light TruckSavana 350020106.6L
GMCAuto and Light TruckSierra 1500 Classic20076.0L
GMCAuto and Light TruckSierra 1500 HD20036.0L
GMCAuto and Light TruckSierra 1500 HD20056.0L
GMCAuto and Light TruckSierra 150020034.3L
GMCAuto and Light TruckSierra 150020034.8L
GMCAuto and Light TruckSierra 150020035.3L
GMCAuto and Light TruckSierra 150020036.0L
GMCAuto and Light TruckSierra 150020044.3L
GMCAuto and Light TruckSierra 150020044.8L
GMCAuto and Light TruckSierra 150020045.3L
GMCAuto and Light TruckSierra 150020046.0L
GMCAuto and Light TruckSierra 150020056.0L
GMCAuto and Light TruckSierra 150020066.0L
GMCAuto and Light TruckSierra 2500 HD Classic20076.0L
GMCAuto and Light TruckSierra 2500 HD20036.0L
GMCAuto and Light TruckSierra 2500 HD20036.6L
GMCAuto and Light TruckSierra 2500 HD20038.1L
GMCAuto and Light TruckSierra 2500 HD20046.0L
GMCAuto and Light TruckSierra 2500 HD20046.6L
GMCAuto and Light TruckSierra 2500 HD20048.1L
GMCAuto and Light TruckSierra 2500 HD20056.0L
GMCAuto and Light TruckSierra 2500 HD20056.6L
GMCAuto and Light TruckSierra 2500 HD20058.1L
GMCAuto and Light TruckSierra 2500 HD20066.6L
GMCAuto and Light TruckSierra 2500 HD20068.1L
GMCAuto and Light TruckSierra 250020036.0L
GMCAuto and Light TruckSierra 250020046.0L
GMCAuto and Light TruckSierra 350020036.0L
GMCAuto and Light TruckSierra 350020036.6L
GMCAuto and Light TruckSierra 350020038.1L
GMCAuto and Light TruckSierra 350020046.0L
GMCAuto and Light TruckSierra 350020046.6L
GMCAuto and Light TruckSierra 350020048.1L
GMCAuto and Light TruckSierra 350020056.0L
GMCAuto and Light TruckSierra 350020056.6L
GMCAuto and Light TruckSierra 350020058.1L
GMCAuto and Light TruckSierra 350020068.1L
GMCAuto and Light TruckYukon XL 150020035.3L
GMCAuto and Light TruckYukon XL 150020036.0L
GMCAuto and Light TruckYukon XL 150020045.3L
GMCAuto and Light TruckYukon XL 150020046.0L
GMCAuto and Light TruckYukon XL 150020056.0L
GMCAuto and Light TruckYukon XL 150020066.0L
GMCAuto and Light TruckYukon XL 250020036.0L
GMCAuto and Light TruckYukon XL 250020038.1L
GMCAuto and Light TruckYukon XL 250020046.0L
GMCAuto and Light TruckYukon XL 250020048.1L
GMCAuto and Light TruckYukon XL 250020056.0L
GMCAuto and Light TruckYukon XL 250020058.1L
GMCAuto and Light TruckYukon XL 250020066.0L
GMCAuto and Light TruckYukon XL 250020068.1L
GMCAuto and Light TruckYukon XL20155.3L
GMCAuto and Light TruckYukon XL20165.3L
GMCAuto and Light TruckYukon XL20175.3L
GMCAuto and Light TruckYukon XL20185.3L
GMCAuto and Light TruckYukon XL20195.3L
GMCAuto and Light TruckYukon XL20205.3L
GMCAuto and Light TruckYukon XL20215.3L
GMCAuto and Light TruckYukon XL20225.3L
GMCAuto and Light TruckYukon XL20235.3L
GMCAuto and Light TruckYukon XL20245.3L
GMCAuto and Light TruckYukon XL20255.3L
GMCAuto and Light TruckYukon XL20265.3L
GMCAuto and Light TruckYukon20034.8L
GMCAuto and Light TruckYukon20035.3L
GMCAuto and Light TruckYukon20036.0L
GMCAuto and Light TruckYukon20044.8L
GMCAuto and Light TruckYukon20045.3L
GMCAuto and Light TruckYukon20046.0L
GMCAuto and Light TruckYukon20056.0L
GMCAuto and Light TruckYukon20066.0L
HummerAuto and Light TruckH220036.0L
HummerAuto and Light TruckH220046.0L
HummerAuto and Light TruckH220056.0L
HummerAuto and Light TruckH220066.0L
IsuzuAuto and Light TruckAscender20035.3L
IsuzuAuto and Light TruckAscender20045.3L
IsuzuAuto and Light TruckAscender20055.3L
IsuzuAuto and Light TruckAscender20065.3L
SaabAuto and Light Truck9-7x20055.3L
SaabAuto and Light Truck9-7x20065.3L

Replaces These Part Numbers

ARROWHEAD400-12478
FAMILYAD244 HO
J&N Electrical Products400-12478

Frequently Asked Questions

Q: Do I need a larger charge wire for a High Output unit?
A: The high amp unit will operate better than stock, but not to its full potential without a larger charge wire. It’s the same reason firetrucks do not use garden hoses. It is IMPARATIVE to have proper charge and ground cables.

Q: Does a High Amp unit cause any damage to my battery or my vehicles charging system?
A: As long as it is installed properly with battery in good condition, then no. A High Output unit works exactly like a factory unit and only produces what is being demanded. No alternator works continuously at full output. Higher amperage is not bad and will not hurt a battery, but high voltage will blow one up.

Q: Will aftermarket underdrive pulleys (crankshaft power pulley) have any effect on my alternator?
A: Yes, underdrive crankshaft pulleys slow all the components (power steering, a/c, and alternator) to provide more power to the rear wheels. In some cases, the charging systems will fall totally on the battery at idle and completely stop charging.

Q: Where is the best place to get a voltage reading of the alternator output?
A: You’ll get the most accurate voltage reading from the back of the alternator at the main charge post that runs directly to the battery. This must be done while the vehicle is running.

Q: Why is the pulley on a high amp alternator smaller than my stock pulley?
A: The smaller pulley advances the power curve of the alternator just slightly, which produces a little more amperage around the idle if needed.

Q: Will I need a smaller belt for my high amp unit?
A: This varies by application because not all belts and belt tensioners are in the same condition. The tensioner will always tell you if you need a new belt or not. If it’s in range, you will not. If it is out, you will. Generally, you will need a belt that is one inch shorter than stock. You should have no problem finding a replacement wherever you buy your parts. V belt applications simply re-adjust your belt tensions to 3/8” deflection.

Q: What is the difference between a one wire, self-exciting and a self-energizing regulator?
A: Nothing. They are all exactly the same. Different manufacturers use different terms for marketing. The only wire to hook up is the charge wire to the battery. This does require modification for the alternator charge light on the dash.

Q: My stock unit used a five-groove pulley, and you sent my high amp alternator with a 6 groove. Why and what can I do?
A: 5 groove overdrive pullies are not produced. Install the belt on the back groove of the pulley closest to the fan or body of the alternator. The fan is internal, and this application will work just fine.

Q: Can your alternator be run in dual or triple alternator applications?
A: Yes. When wired and mounted correctly, the alternator can run in either dual or triple applications.

Q: Will I need a new battery with a high amp alternator?
A: If your battery is in good condition, and in spec of its OEM rating, then no. Your battery should work equally well with either the OEM and a High Amp unit.

Customer Reviews

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