What are the signs of a failing alternator?

Common signs of a failing alternator include dashboard warning lights, electrical issues like overly bright or flickering lights, frequently dying battery, whining, grinding or squealing engine sounds, or stalling or struggling to start the vehicle.

Is the solenoid included?

Yes. GM Genuine Parts and ACDelco Starters include a solenoid compatible with the unit.

Will GM Genuine Parts and ACDelco Alternators and Starters withstand a wide range of weather conditions?

Yes. GM Genuine Parts and ACDelco Alternators and Starters are designed to withstand a wide range of weather conditions.

Do all alternators supply the same amperage?

No. Some vehicles require more amperage than others depending on the amount of electronics that need to be operated. Consult your vehicle Owner’s Manual for more information.

Can a bad alternator damage my battery or other electrical components?

Yes. The alternator keeps the battery charged and operating correctly. A failing alternator can overwork the vehicle’s battery and lead to permanent electrical damage if not addressed.

Acdelco Professional C603z Voltage Regulator

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

€ 117.17

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

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Description

⚡ Power your ride with precision and confidence!

NOISE FREE DRIVE - Advanced radio noise control ensures crystal-clear audio during every ride.
DURABLE DEPENDABLE - Premium aftermarket quality trusted by professionals and enthusiasts alike.
SEAMLESS OEM COMPATIBILITY - Manufactured to exact fit, form, and function standards for hassle-free installation.
OPTIMIZED FOR MODERN VEHICLES - Supports critical electrical systems from startup to accessory power with precision.
ENGINEERED FOR PEAK PERFORMANCE - Delivers stable voltage to keep your vehicle running flawlessly under all conditions.

The ACDelco Professional C603Z Voltage Regulator is a premium aftermarket replacement designed to deliver reliable voltage control, ensuring your vehicle’s electrical systems operate smoothly. Engineered for exact OEM fit and superior radio noise suppression, it guarantees dependable performance and easy installation for a flawless driving experience.

Specifications

ASIN	B000C9QI96
Best Sellers Rank	#112,978 in Automotive ( See Top 100 in Automotive ) #20 in Car Voltage Regulators
Brand	ACDelco
Customer Reviews	4.4 4.4 out of 5 stars (246)
Date First Available	14 August 2012
Item Weight	159 g
Item model number	C603Z
Manufacturer	ACDelco
Manufacturer Part Number	12336870
Model	ACDelco - Voltage Regulat (B) (C603Z)
OEM Part Number	12336870
Product Dimensions	11.94 x 5.08 x 10.41 cm; 158.76 g

Reviews

F**E

Works perfectly

7.05.2025

C**S

It works well enough. I'm using it to replace a broken regulator in the engine computer. With that in mind, the voltage does tend to fluctuate a decent amount with this regulator, especially under heavy load. The voltage gauge will actually wiggle back and forth when the turn signal is on. Otherwise, i've had no issues with this regualtor, you just have to make sure it has a really good ground on the case or you run a high risk of frying it.

29.07.2023

J**F

Worked perfectly

12.04.2026

M**N

I was searching the mopar forums for a reliable voltage regulator and most commented on the reliability of this particular item..( Bonus made in the USA)..and fairly priced as well!!

23.06.2024

H**N

It's letting the alternator charge at 14.9v, a little higher then I would of liked but it works no issue

9.11.2023

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

View all Trustpilot reviews

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

€ 117.17

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Pooja R.

The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

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