2020 GMC Sierra 1500 alternator — 170 amp (opt KW7) price snapshot
- Low
- $50
- Average
- $114
- High
- $311
Year & trim-specific price guide
Used 2020 GMC Sierra 1500 Alternator — 170 amp (opt KW7) prices
Trim-specific pricing for the 170 amp (opt KW7) variant of the 2020 GMC Sierra 1500 alternator, built from 42 real salvage yard listings with condition grade detail.
Price summary
A used 2020 GMC Sierra 1500 alternator (170 amp (opt KW7)) costs $50 to $311, with a median asking price of $86. Based on 42 priced salvage yard listings across the US, updated Aug 3, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$71
Grade B (good)$87
Grade C (fair)$80
USD
Condition comparison
Price by part grade
Grade AClean / low wear$50–$23619 listings
Grade BStandard used$50–$31119 listings
Grade CVisible wear$80–$801 listings
Grade XUngraded$87–$1003 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $50–$236 | 19 | |
| Grade BStandard used | $50–$311 | 19 | |
| Grade CVisible wear | $80–$80 | 1 | |
| Grade XUngraded | $87–$100 | 3 |
Median by grade
Grade price comparison
Grade A$71
Grade B$87
Grade C$80
Ungraded$100
Median asking price by seller-reported condition grade · $50–$311 overall range
Trim-specific context
How does the 170 amp (opt KW7) compare?
This pricing covers the 170 amp (opt KW7) variant of the 2020 GMC Sierra 1500 alternator, based on 42 priced listings. Its $86 median is 4% below the 2020 GMC Sierra 1500 alternator overall median of $90.
There are 6 other alternator variants available for the 2020 GMC Sierra 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
170 amp (opt KW7) in other model years
Same year, other trims
What other 2020 GMC Sierra 1500 alternator variants are available?
220 amp (opt KW5), ID 13534129
47 listings$130$45 – $330220 amp (opt KW5), ID 13539728
47 listings$75$40 – $298220 amp (opt KW5), ID 13527173
43 listings$100$49 – $303220 amp (opt KW5), ID 13531751
43 listings$100$49 – $303220 amp (opt KW5), ID 13534128
43 listings$100$49 – $303220 amp (opt KW5), ID 13529433
41 listings$81$45 – $395Back to full guide
2020 GMC Sierra 1500 alternator — all trims
Common questions
2020 GMC Sierra 1500 alternator (170 amp (opt KW7)) FAQ
How much is a used 2020 GMC Sierra 1500 alternator (170 amp (opt KW7))?
Based on 42 priced salvage-yard listings, a used 2020 GMC Sierra 1500 alternator in the 170 amp (opt KW7) variant lists between $50 and $311, with a median asking price of $86.
Which years use the 170 amp (opt KW7) alternator?
The 170 amp (opt KW7) variant appears in model years 2020, 2021, 2025. Prices and availability may differ by year.