Used 2018 Chevy Silverado 1500 alternator – 100 amp (opt KY4)

Year & trim-specific price guide

Used 2018 Chevy Silverado 1500 Alternator — 100 amp (opt KY4) prices

Trim-specific pricing for the 100 amp (opt KY4) variant of the 2018 Chevy Silverado 1500 alternator, built from 29 real salvage yard listings with condition grade detail.

2018 Chevy Silverado 1500 · 100 amp (opt KY4)

$75

median asking price

29 priced listings · $50–$875

Price summary

A used 2018 Chevy Silverado 1500 alternator (100 amp (opt KY4)) costs $50 to $875, with a median asking price of $75. Based on 29 priced salvage yard listings across the US, updated Aug 21, 2026. Prices exclude shipping, core charges, and installation.

Grade A (excellent)$75
Grade B (good)$75

2018 Chevy Silverado 1500 alternator — 100 amp (opt KY4) price snapshot

USD
Low
$50
Average
$145
High
$875
29 priced listings used · last updated Aug 21, 2026· How we price·

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Reporting price for 2018 Chevy Silverado 1500 Alternator (100 amp (opt KY4))

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Condition comparison

Price by part grade

Grade AClean / low wear$50–$87515 listings
Grade BStandard used$50–$804 listings
Grade CVisible wearUpdating
Grade XUngraded$50–$75010 listings

Median by grade

Grade price comparison

Median asking price by seller-reported condition grade · $50–$875 overall range

Trim-specific context

How does the 100 amp (opt KY4) compare?

This pricing covers the 100 amp (opt KY4) variant of the 2018 Chevy Silverado 1500 alternator, based on 29 priced listings. Its $75 median is 0% above the 2018 Chevy Silverado 1500 alternator overall median of $75.

There are 2 other alternator variants available for the 2018 Chevy Silverado 1500.

Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.

Same trim, other years

100 amp (opt KY4) in other model years

All years
201610 listings$75$45 – $184

Same year, other trims

What other 2018 Chevy Silverado 1500 alternator variants are available?

170 amp (opt KW7)

31 listings$85$40 – $280

150 amp (opt KG4)

28 listings$76$65 – $156

Back to full guide

2018 Chevy Silverado 1500 alternator — all trims

View 2018 guide

Common questions

2018 Chevy Silverado 1500 alternator (100 amp (opt KY4)) FAQ

How much is a used 2018 Chevy Silverado 1500 alternator (100 amp (opt KY4))?

Based on 29 priced salvage-yard listings, a used 2018 Chevy Silverado 1500 alternator in the 100 amp (opt KY4) variant lists between $50 and $875, with a median asking price of $75.

Which years use the 100 amp (opt KY4) alternator?

The 100 amp (opt KY4) variant appears in model years 2016, 2018. Prices and availability may differ by year.