Alternator for 4.2L Trailblazer Envoy 2002-2005, Rainier 2004-2005 ADR0307
Alternator for 4.2L Trailblazer Envoy 2002-2005, Rainier 2004-2005 ADR0307
Alternator for 4.2L Trailblazer Envoy 2002-2005, Rainier 2004-2005 ADR0307
Alternator for 4.2L Trailblazer Envoy 2002-2005, Rainier 2004-2005 ADR0307
Alternator for 4.2L Trailblazer Envoy 2002-2005, Rainier 2004-2005 ADR0307
Alternator for 4.2L Trailblazer Envoy 2002-2005, Rainier 2004-2005 ADR0307
Alternator for 4.2L Trailblazer Envoy 2002-2005, Rainier 2004-2005 ADR0307

Alternator for 4.2L Trailblazer Envoy 2002-2005, Rainier 2004-2005 ADR0307

Item #: 400-12179

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When a returned product comes back to us, we’ll check it over to make sure it’s in ‘Like New’ condition and free from damage such as dents, scratches, cracks, abuse, defacement or indication of removed screws/fasteners or seals. Return processing may take up to 5 business days from the time your product is received by DB Electrical.

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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 for Chevrolet and other GM Vehicles
DB Electrical offers premium-quality alternators that deliver high-performance for Chevrolet and other General Motors brands such as Buick, GMC, Pontiac and Oldsmobile. Owners of Chevy cars, trucks, vans and SUVs appreciate the highly engineered quality of DB Electrical alternators for flawless mechanical performance and longevity. Founded in 1911, Chevy has been a symbol of the American road for over a century. A DB Electrical alternator is a great choice for keeping your Chevrolet or other GM vehicle on the road. (Check our applications table below for specific makes and models for this alternator.)

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 produce better charging and longer life under high-heat environments.
  • 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 – Factory-Direct Pricing and 1-Year Warranty
DB Electrical sells its exceptional-quality electrical components at low factory-direct prices. 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: 400-12179

100% Brand New Aftermarket Part From DB Electrical

Product Specs

Item ConditionAftermarket Part
Unit TypeAlternator
Voltage12
RotationCW
Amperage150
Pulley Class1279
RegulatorIR
FitsCHEVROLET TRAILBLAZER ETC. 4.2L 2002-05
6-GROOVE CONV. PULLEY
62MM OD
DELCO AD244 SERIES

Applications List

Select Make & Type
MAKE TYPE MODEL YEAR ENGINE
BUICKAuto and Light TruckRAINIER20044.2L(256) L6
BUICKAuto and Light TruckRAINIER20054.2L(256) L6
CHEVROLETAuto and Light TruckTRAILBLAZER20024.2L(256) L6
CHEVROLETAuto and Light TruckTRAILBLAZER20034.2L(256) L6
CHEVROLETAuto and Light TruckTRAILBLAZER20044.2L(256) L6
CHEVROLETAuto and Light TruckTRAILBLAZER20054.2L(256) L6
GMCAuto and Light TruckENVOY20024.2L(256) L6
GMCAuto and Light TruckENVOY20034.2L(256) L6
GMCAuto and Light TruckENVOY20044.2L(256) L6
GMCAuto and Light TruckENVOY20054.2L(256) L6
ISUZUAuto and Light TruckASCENDER20034.2L(256) L6
ISUZUAuto and Light TruckASCENDER20044.2L(256) L6
ISUZUAuto and Light TruckASCENDER20054.2L(256) L6
OLDSMOBILEAuto and Light TruckBRAVADA20024.2L(256) L6
OLDSMOBILEAuto and Light TruckBRAVADA20034.2L(256) L6
OLDSMOBILEAuto and Light TruckBRAVADA20044.2L(256) L6
SAABAuto and Light Truck9-7X20054.2L

Replaces These Part Numbers

AC DELCO321-1828, 334-2527
ACECA8544-3-22
ARROWHEADADR0307
BARSANCO110-8290
DELCO10464468, 15062413, 15162839
DIXIEA-1636
DUBOIS908290
FAMILYAD244
ISUZU8104644680
J&N Electrical Products400-12179
LESTER8290
MINNPAR47-1980
NAPA POWER NEW1N-4816G
NAPA POWER PREMIUM PLUS213-4816G
NAPA POWER SUPREME13-4816G
NSAALT-1505
PIC240-6205, 240-6205B
REGITAR-USAA240-6205N
REMY LIGHT DUTY21828
REMY LIGHT DUTY NEW91609
UNIPOINTALT-1505
USA INDUSTRIES8290
WAI1-2417-01DR, 8290N
WILSON90-01-4427
WILSON NEW90-01-4427, 90-01-4427N

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

WARNING: California’s Proposition 65

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