Year & trim-specific price guide

Used 2018 GMC Acadia Alternator — 3.6L, 170 amp (opt KW7) prices

Trim-specific pricing for the 3.6L, 170 amp (opt KW7) variant of the 2018 GMC Acadia alternator, built from 50 real salvage yard listings with condition grade detail.

SKWritten bySaurabh Kumar · Co-Founder & CTO

Saurabh Kumar

Co-Founder & CTO, Part Price Guide

Built the pricing pipeline that collects and normalizes used OEM part listings from salvage yards and online marketplaces across the US.

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ASReviewed byAmbika Sharma · Co-Founder & COO

Ambika Sharma

Co-Founder & COO, Part Price Guide

12 years of project management and technical operations experience. Reviews price guides for sample size, fitment accuracy, and data freshness.

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Last updatedSep 21, 2026

2018 GMC Acadia · 3.6L, 170 amp (opt KW7)

$162

median asking price

50 priced listings · $45–$249

Price summary

A used 2018 GMC Acadia alternator (3.6L, 170 amp (opt KW7)) costs $45 to $249, with a median asking price of $162. Based on 50 priced salvage yard listings across the US, updated Sep 21, 2026. Prices exclude shipping, core charges, and installation.

Grade A (excellent)$162

Grade B (good)$159

2018 GMC Acadia alternator — 3.6L, 170 amp (opt KW7) price snapshot

USD

Low: $45
Average: $147
High: $249

50 priced listings used · last updated Sep 21, 2026· How we price·

Condition comparison

Price by part grade

Grade AClean / low wear$45–$24934 listings

Grade BStandard used$50–$19315 listings

Grade XUngraded$70–$701 listings

Grade	Price range	Listings
Grade AClean / low wear	$45–$249	34
Grade BStandard used	$50–$193	15
Grade XUngraded	$70–$70	1

Median by grade

Grade price comparison

Grade A$162

Grade B$159

Ungraded$70

Median asking price by seller-reported condition grade · $45–$249 overall range

Trim-specific context

How does the 3.6L, 170 amp (opt KW7) compare?

This pricing covers the 3.6L, 170 amp (opt KW7) variant of the 2018 GMC Acadia alternator, based on 50 priced listings. Its $162 median is 2% above the 2018 GMC Acadia alternator overall median of $159.

There are 2 other alternator variants available for the 2018 GMC Acadia.

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

Same trim, other years

3.6L, 170 amp (opt KW7) in other model years

All years

202346 listings$86$40 – $310 202235 listings$150$57 – $290 202149 listings$88$40 – $310 202049 listings$86$40 – $310 201945 listings$110$56 – $272

Same year, other trims

What other 2018 GMC Acadia alternator variants are available?

2.5L

48 listings$107$25 – $268

3.6L, 155 amp (opt KW8)

47 listings$162$50 – $249

Back to full guide

2018 GMC Acadia alternator — all trims

View 2018 guide

Common questions

2018 GMC Acadia alternator (3.6L, 170 amp (opt KW7)) FAQ

How much is a used 2018 GMC Acadia alternator (3.6L, 170 amp (opt KW7))?

Based on 50 priced salvage-yard listings, a used 2018 GMC Acadia alternator in the 3.6L, 170 amp (opt KW7) variant lists between $45 and $249, with a median asking price of $162.

Which years use the 3.6L, 170 amp (opt KW7) alternator?

The 3.6L, 170 amp (opt KW7) variant appears in model years 2018, 2019, 2020, 2021, 2022, 2023. Prices and availability may differ by year.