Alternator for 220 Amp 5.7L Buick Roadmaster 1991-1993 240-503560H ADR0022-220
Alternator for 220 Amp 5.7L Buick Roadmaster 1991-1993 240-503560H ADR0022-220
Alternator for 220 Amp 5.7L Buick Roadmaster 1991-1993 240-503560H ADR0022-220
Alternator for 220 Amp 5.7L Buick Roadmaster 1991-1993 240-503560H ADR0022-220
Alternator for 220 Amp 5.7L Buick Roadmaster 1991-1993 240-503560H ADR0022-220
Alternator for 220 Amp 5.7L Buick Roadmaster 1991-1993 240-503560H ADR0022-220
Alternator for 220 Amp 5.7L Buick Roadmaster 1991-1993 240-503560H ADR0022-220

Alternator for 220 Amp 5.7L Buick Roadmaster 1991-1993 240-503560H ADR0022-220

Item #: 400-12427

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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: 400-12427

100% Brand New Aftermarket Part From DB Electrical

Product Specs

Item ConditionAftermarket Part
Unit TypeAlternator
Voltage12
RotationCW
Amperage220
RegulatorIR
Fan TypeEF
FitsBUICK ROADMASTER 5.7L 1993
CHEVROLET CAPRICE 5.0L, 5.7L 1993
CHEVROLET / GMC LT TRUCKS 6.2L, 6.5L DSL 1993-95
6-GROOVE PULLEY 57mm OD
Critical Note180A High Output Version

Applications List

Select Make & Type
MAKE TYPE MODEL YEAR ENGINE
BUICKAuto and Light TruckROADMASTER19915.0L(305) V8
BUICKAuto and Light TruckROADMASTER19925.7L(350) V8
BUICKAuto and Light TruckROADMASTER19935.7L(350) V8
CADILLACAuto and Light TruckBROUGHAM19915.0L(305) V8
CADILLACAuto and Light TruckBROUGHAM19915.7L(350) V8
CADILLACAuto and Light TruckBROUGHAM19925.0L(305) V8
CADILLACAuto and Light TruckBROUGHAM19925.7L(350) V8
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1987GM 6.2L(379) V8 Dsl
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1988GM 6.2L(379) V8 Dsl
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1989GM 6.2L(379) V8 Dsl
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1990GM 6.2L(379) V8 Dsl
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1991GM 6.2L(379) V8 Dsl
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1992GM 6.2L(379) V8 Dsl
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1995Caterpillar 3116
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1996Caterpillar 3116
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1997Caterpillar 3116
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1998Caterpillar 3116
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel1999Caterpillar 3116
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel2000Caterpillar 3116
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel2001Caterpillar 3116
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Diesel2002Caterpillar 3116
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Gas1987GM 7.4L(454) V8 Gas
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Gas1988GM 7.4L(454) V8 Gas
CHEVROLET / GMCMedium & Heavy-Duty TruckAll Models (By Engine) - Gas1989GM 7.4L(454) V8 Gas
CHEVROLETAuto and Light TruckASTRO VAN19874.3L(262) V6
CHEVROLETAuto and Light TruckASTRO VAN19884.3L(262) V6
CHEVROLETAuto and Light TruckASTRO VAN19894.3L(262) V6
CHEVROLETAuto and Light TruckBLAZER19875.0L(305) V8
CHEVROLETAuto and Light TruckBLAZER19946.5L(395) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19874.3L(262) V6
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19875.0L(305) V8
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19875.7L(350) V8
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19876.2L(379) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19884.3L(262) V6
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19885.0L(305) V8
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19885.7L(350) V8
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19886.2L(379) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19894.3L(262) V6
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19895.0L(305) V8
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19895.7L(350) V8
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19896.2L(379) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19906.2L(379) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19916.2L(379) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19926.2L(379) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19926.5L(395) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19936.2L(379) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19936.5L(395) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19946.5L(395) V8 (Diesel)
CHEVROLETAuto and Light TruckC / K / R / V SERIES PICKUPS19956.5L(395) V8 (Diesel)
CHEVROLETAuto and Light TruckCAMARO19905.0L(305) V8
CHEVROLETAuto and Light TruckCAMARO19905.7L(350) V8
CHEVROLETAuto and Light TruckCAMARO19915.0L(305) V8
CHEVROLETAuto and Light TruckCAMARO19915.7L(350) V8
CHEVROLETAuto and Light TruckCAMARO19925.0L(305) V8
CHEVROLETAuto and Light TruckCAMARO19925.7L(350) V8
CHEVROLETAuto and Light TruckCAPRICE19915.0L(305) V8
CHEVROLETAuto and Light TruckCAPRICE19915.7L(350) V8
CHEVROLETAuto and Light TruckCAPRICE19924.3L(262) V6
CHEVROLETAuto and Light TruckCAPRICE19925.0L(305) V8
CHEVROLETAuto and Light TruckCAPRICE19925.7L(350) V8
CHEVROLETAuto and Light TruckCAPRICE19934.3L(262) V6
CHEVROLETAuto and Light TruckCAPRICE19935.0L(305) V8
CHEVROLETAuto and Light TruckCAPRICE19935.7L(350) V8
CHEVROLETAuto and Light TruckG SERIES VANS19874.3L(262) V6
CHEVROLETAuto and Light TruckG SERIES VANS19875.0L(305) V8
CHEVROLETAuto and Light TruckG SERIES VANS19875.7L(350) V8
CHEVROLETAuto and Light TruckG SERIES VANS19884.3L(262) V6
CHEVROLETAuto and Light TruckG SERIES VANS19885.0L(305) V8
CHEVROLETAuto and Light TruckG SERIES VANS19885.7L(350) V8
CHEVROLETAuto and Light TruckG SERIES VANS19894.3L(262) V6
CHEVROLETAuto and Light TruckG SERIES VANS19895.0L(305) V8
CHEVROLETAuto and Light TruckG SERIES VANS19895.7L(350) V8
CHEVROLETAuto and Light TruckG SERIES VANS19904.3L(262) V6
CHEVROLETAuto and Light TruckG SERIES VANS19905.0L(305) V8
CHEVROLETAuto and Light TruckG SERIES VANS19905.7L(350) V8
CHEVROLETAuto and Light TruckG SERIES VANS19914.3L(262) V6
CHEVROLETAuto and Light TruckG SERIES VANS19915.0L(305) V8
CHEVROLETAuto and Light TruckG SERIES VANS19915.7L(350) V8
CHEVROLETAuto and Light TruckSUBURBAN19875.0L(305) V8
CHEVROLETAuto and Light TruckSUBURBAN19946.5L(395) V8 (Diesel)
CHEVROLETAuto and Light TruckSUBURBAN19956.5L(395) V8 (Diesel)
CHEVROLETAuto and Light TruckTAHOE19956.5L(395) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19874.3L(262) V6
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19875.0L(305) V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19875.7L(350) V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19876.2L(379) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19884.3L(262) V6
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19885.0L(305) V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19885.7L(350) V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19886.2L(379) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19894.3L(262) V6
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19895.0L(305) V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19895.7L(350) V8
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19896.2L(379) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19906.2L(379) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19916.2L(379) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19926.2L(379) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19926.5L(395) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19936.2L(379) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19936.5L(395) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19946.5L(395) V8 (Diesel)
GMCAuto and Light TruckC / K / R / V SERIES PICKUPS19956.5L(395) V8 (Diesel)
GMCAuto and Light TruckG SERIES VANS19874.3L(262) V6
GMCAuto and Light TruckG SERIES VANS19875.0L(305) V8
GMCAuto and Light TruckG SERIES VANS19875.7L(350) V8
GMCAuto and Light TruckG SERIES VANS19884.3L(262) V6
GMCAuto and Light TruckG SERIES VANS19885.0L(305) V8
GMCAuto and Light TruckG SERIES VANS19885.7L(350) V8
GMCAuto and Light TruckG SERIES VANS19894.3L(262) V6
GMCAuto and Light TruckG SERIES VANS19895.0L(305) V8
GMCAuto and Light TruckG SERIES VANS19895.7L(350) V8
GMCAuto and Light TruckG SERIES VANS19904.3L(262) V6
GMCAuto and Light TruckG SERIES VANS19905.0L(305) V8
GMCAuto and Light TruckG SERIES VANS19905.7L(350) V8
GMCAuto and Light TruckG SERIES VANS19914.3L(262) V6
GMCAuto and Light TruckG SERIES VANS19915.0L(305) V8
GMCAuto and Light TruckG SERIES VANS19915.7L(350) V8
GMCAuto and Light TruckJIMMY19875.0L(305) V8
GMCAuto and Light TruckSAFARI VAN19874.3L(262) V6
GMCAuto and Light TruckSAFARI VAN19884.3L(262) V6
GMCAuto and Light TruckSAFARI VAN19894.3L(262) V6
GMCAuto and Light TruckSUBURBAN19875.0L(305) V8
GMCAuto and Light TruckSUBURBAN19936.2L(379) V8 (Diesel)
GMCAuto and Light TruckSUBURBAN19936.5L(395) V8 (Diesel)
GMCAuto and Light TruckSUBURBAN19946.5L(395) V8 (Diesel)
GMCAuto and Light TruckSUBURBAN19956.5L(395) V8 (Diesel)
GMCAuto and Light TruckYUKON19946.5L(395) V8 (Diesel)
GMCAuto and Light TruckYUKON19956.5L(395) V8 (Diesel)
HUMMERAuto and Light TruckH119926.2L(379) V8 (Diesel)
HUMMERAuto and Light TruckH119936.2L(379) V8 (Diesel)
HUMMERAuto and Light TruckH119946.2L(379) V8 (Diesel)
OLDSMOBILEAuto and Light TruckCUSTOM CRUISER19915.0L(305) V8
OLDSMOBILEAuto and Light TruckCUSTOM CRUISER19925.0L(305) V8
OLDSMOBILEAuto and Light TruckCUSTOM CRUISER19925.7L(350) V8
PONTIACAuto and Light TruckFIREBIRD19905.0L(305) V8
PONTIACAuto and Light TruckFIREBIRD19905.7L(350) V8
PONTIACAuto and Light TruckFIREBIRD19915.0L(305) V8
PONTIACAuto and Light TruckFIREBIRD19915.7L(350) V8
PONTIACAuto and Light TruckFIREBIRD19925.0L(305) V8
PONTIACAuto and Light TruckFIREBIRD19925.7L(350) V8

Replaces These Part Numbers

ARROWHEADADR0022-160, ADR0022-220
FAMILYCS130 HO
J&N Electrical Products400-12427
LESTER8165-11-160
PIC240-503560H

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.

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