1978 GMC G25 Alternators and Starters

Essential 1978 GMC G25 Alternators and Starters

Carquest HD Electrical – Alternator: New, 63 Amps, With Pulley (Part No.71-7127-3N)

Alternator: New, 63 Amps, With Pulley

from

$136.99
Carquest Starters with 100% NEW construction will restore hard working vehicles to exceed OE specified performance & endurance. All new units and components offer unmatched performance, reduce downtime & customer comebacks. Carquest HD alternators are pri

Product Features:
  • High quality components form the foundation our parts are built from. Transpo’s innovative and high quality electronic technologies for internal components are incorporated to achieve high performance outputs.
  • Power & Efficiency are designed into every component. No matter the ambient temperature, starters will provide maximum cranking power to get engines running.
  • Connectors and power transmission components are highly resistant to extreme moisture environments because we use nickel plated contactors and double armature coating. We maintain a rigorous test schedule with endurance, salt spray, dirt and grime and out
  • Integrated magnetic switch provides protection against weak power from batteries.
  • Over-Crank Protection (OCP) Monitors heat in starter from over cranking & shuts down starter to prevent burning
  • Precision design and machining are the Extreme vibration failure solution. Vehicles often perform in adverse conditions like extreme temperatures that create tolerance shifts that produce high frequency vibration, which leads to resistance in power transf
  • Load dump protection ensures transient voltage spikes do not damage transistor
  • Improved power transmission with lower engine speed keeps accessories and powered implements running at maximum output without additional load to the engine.
See More

Spectre – SBC Alt Bracket W/ Bolts (Part No.42283)

SBC Alt Bracket W/ Bolts

from

$15.99
This Spectre Alternator Bracket is a mount designed to fit 1969-1975 Chevrolet 265-400 Small Block engines with a short water pump with headers. Featuring a triple chrome-plated finish and high quality steel construction, this part is a replacement that mounts on the driver’s side. Intended to be used in conjunction with part number 42273 to mount the alternator, this bracket features a custom design for show quality appearances.

Product Features:
  • Fits Small Block Chevy 265-400 engines from 1969 to 1975 with headers and a short water pump
  • Manufactured from high quality steel
  • Designed for driver side mounting
  • Features a triple chrome-plated finish
  • Intended for use with part number 42273
See More

Locksmart – Ignition Lock Cylinder (Part No.LC14220)

Ignition Lock Cylinder

from

$16.05
LockSmart® is a specialized aftermarket lock brand featuring door, trunk, and ignition lock cylinders. LockSmart® provides OE fit, form, and function locks across domestic and import applications for both late and older model vehicles.

Product Features:
  • Direct-fit OE replacement ignition lock cylinder ensures effective start of engine energy supply
  • Constructed from high-grade materials to ensure durability and longevity
  • Undergoes 100% testing for proper fit, form, and function
  • As a global manufacturer, we maintain complete quality control throughout the manufacturing process
See More

Carquest – Starter Bushing (Part No.SB123)

Starter Bushing

from

$3.05
High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:
  • Designed to OE standards for ease of installation
  • BWD is a global manufacturer of original equipment ignition products, complete quality control is maintained through the manufacturing process from componentry to finished product
See More

Dorman – Offset Starter Alignment Shim, (1) 1/64, (1) 3/64, (1) 1/16 In., GM (sold by each) (Part No.678-211)

Offset Starter Alignment Shim, (1) 1/64, (1) 3/64, (1) 1/16 In., GM (sold by each)

from

$4.99
Dorman’s Starter Motor Shims are manufactured with a high corrosion resistance for long-lasting performance. The shims effectively space out the starter for proper alignment.

Product Features:
  • Conveniently available in various styles and in packs of different quantities
  • High quality steel construction
  • Shimming helps stop whining and/or grinding noises from the starter motor when due to improper alignment
  • Dorman’s Starter Motor Shims are constructed to strict engineering quality standards
See More

Dorman – Help – Offset Starter Alignment Shim, (1) 1/64, (1) 3/64, (1) 1/16 In., GM (Part No.02350)

Offset Starter Alignment Shim, (1) 1/64, (1) 3/64, (1) 1/16 In., GM

from

$7.99
Our Starter Motor Shims are manufactured with a high corrosion resistance for long-lasting performance. The shims effectively space out the starter for proper alignment.

Product Features:
  • Conveniently available in various styles and in packs of different quantities
  • High quality steel construction
  • Shimming helps stop whining and/or grinding noises from the starter motor when due to improper alignment
  • Dorman’s Starter Motor Shims are constructed to strict engineering quality standards
See More

Carquest Premium – Alternator Brush Holder (Part No.XAC1044)

Alternator Brush Holder

from

$14.99
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
See More

Carquest Premium – Alternator Brush Set (Part No.XAA1042)

Alternator Brush Set

from

$10.49
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
See More

Mr. Gasket – Starter Motor Heat Shield (Part No.3678)

Starter Motor Heat Shield

from

$40.99
The starter motor heat shield is designed with heat resistant material sandwiched between two aluminum plates. The shield protects the starter from heat buildup from the exhaust system, especially important when using headers. Fits Chevy small and big block and V6.

Product Features:
  • Starter heat shield
  • Small block big block 90 degree V6 Chevy
  • Protects starter from high temperatures
  • Made of 2 sheets of aluminum heat resistant center
  • Natural finish
See More

Carquest Standard – Starter Remanufactured Standard (Part No.3664SV)

Starter Remanufactured Standard

from

$62.99
Carquest Standard starters are designed and built to meet original equipment (O.E.) specifications, while providing great value. Our starters are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. All of our Carquest Standard starters are inspected and 100% tested to ensure they are built to meet OEM fit, form and function. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:
  • Designed to meet OE specifications for fit, form and function
  • Remanufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
  • Application-specific technical bulletins included where applicable
  • All units are 100% triple tested to ensure quality and performance
  • Technical support team staffed with ASE Certified Technicians: 1-800-228-9672
See More

Carquest Professional – Starter-New (Part No.3631SN)

Starter-New

from

$154.99
Carquest Professional starters are 100% new units that are built to meet or exceed original equipment (O.E.) specifications. Our new starters are engineered and built by an IATF/TS 16949 certified supplier that meets the highest standards achievable. Carquest Professional starters are re-engineered to include improvements and enhancements (where applicable) to the OE design to extend longevity and service life. Our new starters are built with all new components and are 100% triple-tested to ensure high quality that is backed by an industry-leading warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:
  • Designed to meet or exceed OE specifications for fit, form and function
  • Manufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
  • Housings are 100% new with dimensions computer gauged and measured to ensure proper fitment
  • All new components are utilized to ensure long service life
  • Internal electronics are upgraded for heavy duty reliability (where applicable)
  • Armatures and commutators are 100% load tested
  • Application-specific technical bulletins included where applicable
  • All units are 100% triple tested to ensure quality and performance
  • Technical support team staffed with ASE Certified Technicians: 1-800-228-10493
See More

National – Bearings (Part No.203-S)

Bearings

from

$21.49
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:
  • Premium bearing design matches OEM specifications
  • Precision manufactured using premium-grade steel for outstanding durability and performance
  • Controlled heat treating process for lasting performance and extended bearing life
  • Industry leading coverage
  • Professional technicians know they can depend on National
See More

National – Bearings (Part No.MNJ-471-S)

Bearings

from

$14.29
National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

Product Features:
  • Premium bearing design matches OEM specifications
  • Precision manufactured using premium-grade steel for outstanding durability and performance
  • Available in both caged design and full complement
  • Industry leading coverage
  • Professional technicians know they can depend on National
See More

Dorman – Electrical Harness – 2-Wire Alternator External Regulator (Part No.85840)

Electrical Harness - 2-Wire Alternator External Regulator

from

$3.79
Dorman offers a comprehensive line of Alternator Connectors for a wide range of applications. All our Alternator Connectors are constructed of high-quality materials for long-lasting durability.

Product Features:
  • Available in different wire configurations including 1-, 2-, and 3-wire
  • Direct replacement Alternator Connectors available (where applicable) to ensure a proper fit
  • Easy installation-splice in the new socket to your existing wiring
  • Vehicle try-on testing has been conducted on this part to ensure trouble-free performance
See More

Carquest – Alternator Electrical Connector (Part No.PT68)

Alternator Electrical Connector

from

$4.29
BWD is an aftermarket leader, providing a premium line of engine management products. BWD manufactures and distributes high technology critical components for late model domestic and import vehicles. BWD is constantly evolving to give customers the competitive edge they need to compete in today’s ever-changing marketplace.

Product Features:
  • Our knock sensors are designed to respond to knock frequencies up to 1000 Hz accommodating shifts in engine knock frequency making it a more flexible sensor responding to correct engine knock over a broad range of vehicle conditions
  • Manufacturing processes include an automated data acquisition system to continuously monitor the sensor output to ensure that it responds with appropriate voltage output at the specified frequency range
  • All units are 100% tested using an accelerometer vibration test to ensure trouble-free operation
  • Featuring the broadest sensor coverage in the market, we meet the service professionals needs with the highest quality product every time he opens the box
  • BWD is a global manufacturer of original equipment ignition products, complete quality control is maintained through the manufacturing process from componentry to finished product
See More

Carquest Premium – Starter Solenoid (Part No.SAC1146)

Starter Solenoid

from

$36.49
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
See More

Carquest – Starter Solenoid (Part No.S100)

Starter Solenoid

from

$32.05
High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:
  • Designed to OE standards for ease of installation
  • The BWD SELECT® solenoids contain more pure copper windings than found on most vehicles and create a stronger magnetic field in even the hottest environments for better performance.
  • The BWD SELECT® solenoids contain cadmium-plated copper discs and solid contact bolts reduce voltage drop to deliver full battery power to the starter and have pure copper battery terminal studs that reduce resistance and permit higher current flow.
  • BWD is a global manufacturer of original equipment ignition products, complete quality control is maintained through the manufacturing process from componentry to finished product
See More

Carquest Premium – Alternator Rectifier Bridge (Part No.SCA1008)

Alternator Rectifier Bridge

from

$31.99
The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:
  • Application matched components ensure the charging system can be returned to like new condition.
See More

Carquest – Starter Brush Set (Part No.X265)

Starter Brush Set

from

$6.29
High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:
  • Designed to OE standards for ease of installation
  • BWD is a global manufacturer of original equipment ignition products, complete quality control is maintained through the manufacturing process from componentry to finished product
See More

Carquest Premium – Starter Brush (Part No.XAA1014)

Starter Brush

from

$5.29
The starting system consists of the rotating electrical motor and solenoid which may be mounted on the starter motor or mounted remotely. The electric motor drives a gear which engages with the engine’s flywheel located at the rear of the motor, when the motor is energized, the motor will turn the engines crankshaft. Individual motor components are available to service any failed part within the motor such as brushes, bushings, and starter drive unit.

Product Features:
  • Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
See More

Carquest Premium – Alternator Diode Trio (Part No.SCA1002)

Alternator Diode Trio

from

$6.99
The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:
  • Application matched components ensure the charging system can be returned to like new condition.
See More

Carquest – Voltage Regulator (Part No.R291)

Voltage Regulator

from

$28.99
Product Features:
  • Our Throttle Position Sensors maintain specific installed outputs to match OE rather than adjustable consolidated designs
  • Circuits are printed on flexible polyimide film or ceramic-based substrates for excellent dimensional stability preventing electrical performance drift. Noble palladium/gold/platinum alloys provide low contact resistance for extended service life
  • Each TPS uses integral rotor bearings and return springs for easy installation
  • Each sensor undergoes rigorous end-of-line testing with thousands of data points to validate output voltages for optimum performance and trouble-free operation
See More

Carquest Premium – Voltage Regulator (Part No.RAA1056)

Voltage Regulator

from

$14.49
CARQUEST Voltage Regulators are engineered and created by an automotive charging system manufacturer designed to meet or exceed OEM specifications. By fully understanding how the alternator and the voltage regulator interact ensures that the CARQUEST volt

Product Features:
  • CARQUEST Voltage Regulators are designed to match OE fit, form and function. Fitted with critical OEM electronic components results in longer life expectancy.
  • CARQUEST Voltage Regulators are mechanically designed with utilization of surface mount technology, robust mechanical housing, and consistent encapsulation to protect against moistures & vibration.
  • CARQUEST Voltage Regulators uses surface mount technology and uniform encapsulation to protect against moistures & vibration.
  • CARQUEST Voltage Regulators are 100% individually tested for all product functionalities that includes the proper voltage set-point, power capabilities, and other product specifications.
See More

ACDelco – Voltage Regulator (Part No.D663)

Voltage Regulator

from

$94.99
ACDelco Professional Voltage Regulator is a high quality aftermarket replacement component for one or more of the following vehicle systems: starting and charging. This premium aftermarket motor is manufactured to meet or exceed your expectations for fit, form, and function.

Product Features:
  • Professional, premium aftermarket replacement
  • Provides the performance and dependability you expect from ACDelco
  • Manufactured to meet expectations for fit, form, and function
See More

Carquest Premium – Alternator Connector (Part No.PTA1031)

Alternator Connector

from

$4.29
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

Product Features:
  • Premium quality materials for longer service life
  • Sealed connections (where applicable) to prevent environmental corrosion and performance issues
  • Global coverage for import and/or domestic applications
  • OE specified wire gauge to ensure a reliable electrical connection
  • Designed to meet or exceed OE specifications in form, fit and function
See More

Carquest Premium – Suspension Yaw Sensor (Part No.PTA1165)

Suspension Yaw Sensor

from

$11.79
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
See More

Carquest Premium – Voltage Regulator Connector (Part No.PTA1263)

Voltage Regulator Connector

from

$5.29
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

Product Features:
  • Premium quality materials for longer service life
  • Sealed connections (where applicable) to prevent environmental corrosion and performance issues
  • Global coverage for import and/or domestic applications
  • OE specified wire gauge to ensure a reliable electrical connection
  • Designed to meet or exceed OE specifications in form, fit and function
See More

1978 GMC G25 Alternators and Starters

You count on your 1978 GMC G25 to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Alternators and Starters. With 55 Alternators and Starters ranging in price from $2.49 to $228.99, you’re sure to find everything you need for your 1978 GMC G25.

Brands matter. If you want to shop a specific Alternators and Starters brand, we stock 11 different brands like Carquest, Carquest Premium, and Dorman. 1978 GMC G25 Alternators and Starters start as low as $2.49!

One of the best ways to find top quality OEM or aftermarket Alternators and Starters is by asking professionals. Short of that, you can shop with confidence thanks to our 1,432 extensive product reviews on 1978 GMC G25 Alternators and Starters. Some of the top-rated Alternators and Starters products we carry are Alternator Electrical Connector with 4.9 stars and Alternator Remanufactured with 4.6 stars.

Did we mention you can order your Alternators and Starters from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Alternators and Starters inventory for your 1978 GMC G25 below to get started!

Top-Rated Alternators and Starters Brands For Your 1978 GMC G25

Trusted Alternators and Starters OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 1978 GMC G25 running right for years to come. In our inventory you’ll find brands like Carquest, Carquest Premium, Dorman, and even more.

Popular Carquest Professional Alternators and Starters

You’ll find popular Carquest Professional brand products across Starter Parts and Alternator Parts. All are waiting to get your 1978 GMC G25 back on the road. Some of the top-rated Carquest Professional products in these categories are:
Starter-New
from $228.99
(1)
Starter-New
Starters
Alternator-New
from $104.99
(1)
Alternator-New
Alternators

FAQs for 1978 GMC G25 Alternators and Starters

What are the most purchased Alternators and Starters for the 1978 GMC G25?

Out of 55 Alternators and Starters for the 1978 GMC G25, the most popular in our inventory are:
Alternator Remanufactured Premium
from $89.99
(57)
Alternator Remanufactured Premium
Alternators
Starter Remanufactured Premium
from $81.99
(35)
Starter Remanufactured Premium
Starters
Alternator Remanufactured Premium
from $108.99
(2)
Alternator Remanufactured Premium
Alternators

What are the top-rated 1978 GMC G25 Alternators and Starters?

Top-rated Alternators and Starters for your 1978 GMC G25 based on customer reviews/ratings are:
Alternator Electrical Connector
from $4.29
(11)
Alternator Electrical Connector
“Used to wire a newer internal regulator alternator on vintage car.”
Alternator Remanufactured
from $89.99
(11)
Alternator Remanufactured
“Bought this due to bearings going out in old alternator(Squealed and wouldn’t charge all the time)! It was easy to install and at a great price! My ”
Offset Starter Alignment Shim, (1) 1/64, (1) 3/64, (1) 1/16 In., GM
from $7.99
(6)
Offset Starter Alignment Shim, (1) 1/64, (1) 3/64, (1) 1/16 In., GM
“installed a older starter so I had to buy shims to install it worked fine”