Description
Warranty & Shipping
How-To & Tools
Product Reviews
Q&A
Vehicle Fit

Part Details

  • Voltage / Wattage / Amperage Rating:   145 Amp

Specifications:

  • Brand New, Not Remanufactured Alternator
  • 145 Amps
    • RPO option code KG3
  • No core charge
  • Direct replacement
  • Built to strict quality control standards
This replacement alternator is just what you need to get your vehicle in good working order again. If your battery is no longer being charged completely, or at all, this alternator may be the solution for you.

Our electrical and electronic parts are subject to strict quality control testing. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Disconnecting the Battery (0:36)
    • Disconnect the negative battery cable with an 8mm wrench
  2. step : Removing the Air Intake Hose (0:49)
    • Loosen the two air intake hose clamps with a flat blade screwdriver
    • Remove the T30 Torx bolt from the air intake hose
    • Pull the intake hose up and off
  3. step : Removing the Serpentine Belt (1:20)
    • Familiarize yourself with the belt routing diagram
    • Attach a 15mm socket and ratchet to the tensioner
    • Push the tensioner down to loosen the belt
    • Pull the belt off the center pulley
    • Carefully release the tensioner
    • Pull the belt off the alternator
  4. step : Removing the Alternator (1:55)
    • Disconnect the alternator wiring harness
    • Pull back the alternator wiring lead boot
    • Remove the 19mm nut from the alternator lead
    • Pull off the alternator lead
    • Remove the two 15mm bolts from the alternator
    • Pry the alternator out with a flat blade screwdriver
  5. step : Installing the New Alternator (2:51)
    • Hammer out the alternator bolt rings
    • Lower the new alternator into place
    • Insert the two 15mm bolts into the alternator
    • Connect the alternator wiring harness
    • Put the alternator wiring lead on its stud
    • Fasten the 10mm nut onto the wiring lead
    • Put the wiring lead boot into place
  6. step : Reinstalling the Serpentine Belt (4:09)
    • Pull the belt over the alternator pulley
    • Make sure the belt is routed correctly, using the belt diagram
    • Attach a 15mm socket and ratchet to the tensioner
    • Push the tensioner down to loosen the belt
    • Pull the belt onto the center pulley
    • Carefully release the tensioner
  7. step : Reinstalling the Intake Hose (4:52)
    • Put the intake hose into place
    • Tighten the two intake hose clamps with a flat blade screwdriver
    • Tighten the T30 bolt into the intake hose
  8. step : Reconnecting the Battery (5:34)
    • Reconnect the negative battery cable with an 8mm wrench

Tools needed for replacement:

    General Tools

  • Hammer

  • Ratchets & Related

  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket
  • 15mm Socket
  • 8mm Socket

  • Torx Drivers & Sockets

  • T30 Torx Driver

4.85/ 5.0
13 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
11
2
0
0
0
WINNIE NOISE
THIS ALTERNATOR MAKE A WINNIE NOISE. AS YOU RAIS THE RPMS IT GET LOUDER. IM HOPING THIS GET BETTER OR GOES AWAY VERY SOON AS IT IS ANNOYING . THANKS, EARL MCNEIL
March 5, 2017
Alternator
Works great for the price cheaper than any auto store I would recommend this company to anyone for auto parts reasonably priced and good products
July 21, 2017
Saved $70.00
THE ALTERNATOR IS HITTING WITHIN THE SPECS ON MY YUKON. IDENTICAL PART TO THE OEM EQUIPMENT AND SAVED ME $70.00 FROM A BRICK AND MORTAR STORE. THIS IS MY NEW WAY OF BUYING AUTO PARTS
September 13, 2017
Alternator
Fits perfectly and was very easy to install. Received it very quickly within 2 days of ordering.
September 24, 2017
1st Order
Great price, perfect fit for my 2003 6.0lL GMC DENALI. Shipping was very quick. Thanks for your DIY videos as well.
February 1, 2018
Fast shipping.
Exactly what I ordered. Arrived quick. Customer support is the best of any company I’ve dealt with. Quick response to questions and concerns.
April 10, 2018
Good quality
Alternator came early.Had it installed the next day.
April 28, 2018
good price!
A1 auto carries most parts for whatever model of car you have. The shipping was quick and the order processing was very fast. Customer service rates an A++
May 23, 2018
great update for your truck
Looking for a great update for your truck. Add this 40 more amps for all your accessories . Dont forget get longer drive belt.
June 6, 2018
Just as described
Great product and service. Perfect fit and quiet like a mouse.
August 8, 2018
Great part at a great price
Very happy with my purchase. Fast shipping. Great price
September 6, 2018
Great Service
The web site is easy to navigate to get the correct part, and the videos help a ton.
October 21, 2018
Alternator
Great how to video. Part was correct. Simple to replace. Priced great! Works great!
December 5, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
What is the country or origin?
Matthew B September 21, 2017
This is made in either China or Taiwan.
Alex P September 21, 2017
China
Hardy C September 23, 2017
Hello. So I was wondering where exactly on this alternator that the 4 pin plug is located? I have a 2004 Escalade 6.0 liter, the factory alternator as it sits in my truck ,looking at it from the front , the plug is located at the 11 o’clock position. I ran the vin number and it states that it came factory with a 145 amp alternator. Just wanted to make sure of the location because some alternators have the plug at the 12 o’clock position. And also wanted to know if I needed to increase the belt size with this alternator? Any help would be great. Thanks
Kevin W June 29, 2018
Year Make Model Description
2004-2006Buick Rainier Buick Rainier 145 Amp Alternator V8 5.3L (8th Vin Digit P)
2003-2004Cadillac Escalade Cadillac Escalade 145 Amp Alternator V8 5.3L (8th Vin Digit T)
2003-2005Cadillac Escalade Cadillac Escalade 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004Cadillac Escalade ESV Cadillac Escalade ESV 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004Cadillac Escalade EXT Cadillac Escalade EXT 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004Chevy Avalanche 1500 Chevy Avalanche 1500 145 Amp Alternator V8 5.3L (8th Vin Digit T)
2003-2006Chevy Avalanche 2500 Chevy Avalanche 2500 145 Amp Alternator V8 8.1L (8th Vin Digit G)
2003-2008Chevy Express 1500 Van Chevy Express 1500 Van 145 Amp Alternator V6 4.3L (8th Vin Digit X)
2003-2009Chevy Express 1500 Van Chevy Express 1500 Van 145 Amp Alternator V8 4.8L (8th Vin Digit V)
2003-2008Chevy Express 1500 Van Chevy Express 1500 Van 145 Amp Alternator V8 5.3L (8th Vin Digit T)
2003-2008Chevy Express 2500 Van Chevy Express 2500 Van 145 Amp Alternator V6 4.3L (8th Vin Digit X)
2003-2009Chevy Express 2500 Van Chevy Express 2500 Van 145 Amp Alternator V8 4.8L (8th Vin Digit V)
2003-2008Chevy Express 2500 Van Chevy Express 2500 Van 145 Amp Alternator V8 5.3L (8th Vin Digit T)
2003-2007Chevy Express 2500 Van Chevy Express 2500 Van 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2008-2009Chevy Express 2500 Van Chevy Express 2500 Van 145 Amp Alternator V8 6.0L (8th Vin Digit K)
2003-2007Chevy Express 3500 Van Chevy Express 3500 Van 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2008-2009Chevy Express 3500 Van Chevy Express 3500 Van 145 Amp Alternator V8 6.0L (8th Vin Digit K)
2003-2004Chevy SSR Chevy SSR 145 Amp Alternator V8 5.3L (8th Vin Digit T)
2005Chevy SSR Chevy SSR 145 Amp Alternator V8 6.0L (8th Vin Digit H)
2003-2004Chevy Silverado 1500 Chevy Silverado 1500 145 Amp Alternator V6 4.3L (8th Vin Digit X)
2003-2004Chevy Silverado 1500 Chevy Silverado 1500 145 Amp Alternator V8 4.8L (8th Vin Digit V)
2003-2004Chevy Silverado 1500 Chevy Silverado 1500 145 Amp Alternator V8 5.3L (8th Vin Digit T or Z)
2003-2004Chevy Silverado 1500 Chevy Silverado 1500 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004Chevy Silverado 1500 Chevy Silverado 1500 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2003Chevy Silverado 1500 HD Chevy Silverado 1500 HD 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2006Chevy Silverado 1500 HD Chevy Silverado 1500 HD 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2007Chevy Silverado 1500 HD Classic Chevy Silverado 1500 HD Classic 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2003-2004Chevy Silverado 2500 Chevy Silverado 2500 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004Chevy Silverado 2500 Chevy Silverado 2500 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2003-2004Chevy Silverado 2500 HD Chevy Silverado 2500 HD 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004Chevy Silverado 2500 HD Chevy Silverado 2500 HD 145 Amp Alternator V8 6.6L Diesel (8th Vin Digit 1)
2003-2006Chevy Silverado 2500 HD Chevy Silverado 2500 HD 145 Amp Alternator V8 8.1L (8th Vin Digit G)
2003-2006Chevy Silverado 2500 HD Chevy Silverado 2500 HD 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2005-2006Chevy Silverado 2500 HD Chevy Silverado 2500 HD 145 Amp Alternator V8 6.6L Diesel
2007Chevy Silverado 2500 HD Classic Chevy Silverado 2500 HD Classic 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2007Chevy Silverado 2500 HD Classic Chevy Silverado 2500 HD Classic 145 Amp Alternator V8 8.1L (8th Vin Digit G)
2003-2004Chevy Silverado 3500 Chevy Silverado 3500 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004Chevy Silverado 3500 Chevy Silverado 3500 145 Amp Alternator V8 6.6L Diesel (8th Vin Digit 1)
2003-2006Chevy Silverado 3500 Chevy Silverado 3500 145 Amp Alternator V8 8.1L (8th Vin Digit G)
2003-2006Chevy Silverado 3500 Chevy Silverado 3500 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2005-2006Chevy Silverado 3500 Chevy Silverado 3500 145 Amp Alternator V8 6.6L Diesel
2007Chevy Silverado 3500 Classic Chevy Silverado 3500 Classic 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2007Chevy Silverado 3500 Classic Chevy Silverado 3500 Classic 145 Amp Alternator V8 8.1L (8th Vin Digit G)
2003-2004Chevy Suburban 1500 Chevy Suburban 1500 145 Amp Alternator V8 5.3L (8th Vin Digit T or Z)
2003-2006Chevy Suburban 2500 Chevy Suburban 2500 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2003-2006Chevy Suburban 2500 Chevy Suburban 2500 145 Amp Alternator V8 8.1L (8th Vin Digit G)
2003-2004Chevy Tahoe Chevy Tahoe 145 Amp Alternator V8 4.8L (8th Vin Digit V)
2003-2004Chevy Tahoe Chevy Tahoe 145 Amp Alternator V8 5.3L (8th Vin Digit T or Z)
2006Chevy Trailblazer Chevy Trailblazer 145 Amp Alternator V8 5.3L (8th Vin Digit M)
2003-2004Chevy Trailblazer EXT Chevy Trailblazer EXT 145 Amp Alternator V8 5.3L (8th Vin Digit P)
2005Chevy Trailblazer EXT Chevy Trailblazer EXT 145 Amp Alternator V8 5.3L (8th Vin Digit M)
2005-2006GMC Envoy GMC Envoy Denali 145 Amp Alternator V8 5.3L (8th Vin Digit M)
2003-2004GMC Envoy XL GMC Envoy XL 145 Amp Alternator V8 5.3L (8th Vin Digit M)
2003-2008GMC Savana 1500 Van GMC Savana 1500 Van 145 Amp Alternator V6 4.3L (8th Vin Digit X)
2003-2007GMC Savana 1500 Van GMC Savana 1500 Van 145 Amp Alternator V8 5.3L (8th Vin Digit T)
2003-2007GMC Savana 1500 Van GMC Savana 1500 Van 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2008-2009GMC Savana 1500 Van GMC Savana 1500 Van 145 Amp Alternator V8 6.0L (8th Vin Digit K)
2003-2008GMC Savana 2500 Van GMC Savana 2500 Van 145 Amp Alternator V6 4.3L (8th Vin Digit X)
2003-2007GMC Savana 2500 Van GMC Savana 2500 Van 145 Amp Alternator V8 4.8L (8th Vin Digit V)
2003-2007GMC Savana 2500 Van GMC Savana 2500 Van 145 Amp Alternator V8 5.3L (8th Vin Digit T)
2003-2007GMC Savana 2500 Van GMC Savana 2500 Van 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2008-2009GMC Savana 2500 Van GMC Savana 2500 Van 145 Amp Alternator V8 4.8L (8th Vin Digit C)
2008-2009GMC Savana 2500 Van GMC Savana 2500 Van 145 Amp Alternator V8 6.0L (8th Vin Digit K)
2003-2007GMC Savana 3500 Van GMC Savana 3500 Van 145 Amp Alternator V8 4.8L (8th Vin Digit V)
2003-2007GMC Savana 3500 Van GMC Savana 3500 Van 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2008-2009GMC Savana 3500 Van GMC Savana 3500 Van 145 Amp Alternator L6 4.8L (8th Vin Digit C)
2008-2009GMC Savana 3500 Van GMC Savana 3500 Van 145 Amp Alternator V8 6.0L (8th Vin Digit K)
2003-2004GMC Sierra 1500 GMC Sierra 1500 145 Amp Alternator V8 4.8L (8th Vin Digit V)
2003-2004GMC Sierra 1500 GMC Sierra 1500 145 Amp Alternator V8 5.3L (8th Vin Digit T or Z)
2003-2004GMC Sierra 1500 GMC Sierra 1500 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004GMC Sierra 1500 GMC Sierra 1500 145 Amp Alternator V6 4.3L (8th Vin Digit X)
2003-2004GMC Sierra 1500 GMC Sierra 1500 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2003GMC Sierra 1500 HD GMC Sierra 1500 HD 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2006GMC Sierra 1500 HD GMC Sierra 1500 HD 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2007GMC Sierra 1500 HD Classic GMC Sierra 1500 HD Classic 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2003-2004GMC Sierra 2500 GMC Sierra 2500 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004GMC Sierra 2500 GMC Sierra 2500 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2003-2004GMC Sierra 2500 HD GMC Sierra 2500 HD 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004GMC Sierra 2500 HD GMC Sierra 2500 HD 145 Amp Alternator V8 6.6L Diesel (8th Vin Digit 1)
2003-2006GMC Sierra 2500 HD GMC Sierra 2500 HD 145 Amp Alternator V8 8.1L (8th Vin Digit G)
2003-2006GMC Sierra 2500 HD GMC Sierra 2500 HD 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2005-2006GMC Sierra 2500 HD GMC Sierra 2500 HD 145 Amp Alternator V8 6.6L Diesel
2007GMC Sierra 2500 HD Classic GMC Sierra 2500 HD Classic 145 Amp Alternator V8 8.1L (8th Vin Digit G)
2007GMC Sierra 2500 HD Classic GMC Sierra 2500 HD Classic 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2003-2004GMC Sierra 3500 GMC Sierra 3500 145 Amp Alternator V8 6.0L (8th Vin Digit N)
2003-2004GMC Sierra 3500 GMC Sierra 3500 145 Amp Alternator V8 6.6L Diesel (8th Vin Digit 1)
2003-2006GMC Sierra 3500 GMC Sierra 3500 145 Amp Alternator V8 8.1L (8th Vin Digit G)
2003-2006GMC Sierra 3500 GMC Sierra 3500 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2005-2006GMC Sierra 3500 GMC Sierra 3500 145 Amp Alternator V8 6.6L Diesel
2007GMC Sierra 3500 Classic GMC Sierra 3500 Classic 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2007GMC Sierra 3500 Classic GMC Sierra 3500 Classic 145 Amp Alternator V8 8.1L (8th Vin Digit G)
2003-2004GMC Yukon GMC Yukon 145 Amp Alternator V8 4.8L (8th Vin Digit V)
2003-2004GMC Yukon GMC Yukon 145 Amp Alternator V8 5.3L (8th Vin Digit T or Z)
2003-2004GMC Yukon XL 1500 GMC Yukon XL 1500 145 Amp Alternator V8 5.3L (8th Vin Digit T or Z)
2003-2006GMC Yukon XL 1500 GMC Yukon XL 1500 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2003-2006GMC Yukon XL 2500 GMC Yukon XL 2500 145 Amp Alternator V8 6.0L (8th Vin Digit U)
2003-2006GMC Yukon XL 2500 GMC Yukon XL 2500 145 Amp Alternator V8 8.1L (8th Vin Digit G)
Part #: 1AEAL00148


Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(06:03 min)