GMC Sierra 1500 alternator — 170 amp (opt KW7) price snapshot
- Low
- $50
- Average
- $142
- High
- $311
Trim-specific price guide
GMC Sierra 1500 Alternator — 170 amp (opt KW7) prices
Pricing for the 170 amp (opt KW7) variant of the GMC Sierra 1500 alternator, aggregated from 141 salvage yard listings across 3 model years.
Price summary
A used GMC Sierra 1500 alternator (170 amp (opt KW7)) costs $50 to $311, with a median asking price of $165. Based on 141 priced salvage yard listings across the US, updated Aug 20, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$169
Grade B (good)$97
Grade C (fair)$80
USD
Condition comparison
Price by part grade
Grade AClean / low wear$50–$24983 listings
Grade BStandard used$50–$31154 listings
Grade CVisible wear$80–$801 listings
Grade XUngraded$87–$1003 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $50–$249 | 83 | |
| Grade BStandard used | $50–$311 | 54 | |
| Grade CVisible wear | $80–$80 | 1 | |
| Grade XUngraded | $87–$100 | 3 |
Median by grade
Grade price comparison
Grade A$169
Grade B$97
Grade C$80
Ungraded$100
Median asking price by seller-reported condition grade · $50–$311 overall range
Trim-specific context
How is the 170 amp (opt KW7) priced differently?
This pricing covers the 170 amp (opt KW7) variant of the GMC Sierra 1500 alternator, based on 141 priced listings across 3 model years (2020, 2021, 2025). Its $165 median is 42% above the GMC Sierra 1500 alternator overall median of $116.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Price by model year
What does a 170 amp (opt KW7) cost by year?
Other trims
Other GMC Sierra 1500 alternator variants
2.0L
1 yr$77$30 – $2692.5L
1 yr$76$40 – $282classic style (mirrors mount in window corner)
1 yr$65$40 – $130new style (mirrors mount on door skin), 170 amp (opt KW7)
1 yr$77$40 – $231new style (mirrors mount on door skin), 220 amp (opt KW5), ID 13527173
1 yr$86$50 – $271new style (mirrors mount on door skin), 220 amp (opt KW5), ID 13529433
1 yr$80$40 – $271new style (mirrors mount on door skin), 220 amp (opt KW5), ID 13531751
1 yr$86$50 – $271new style (mirrors mount on door skin), 220 amp (opt KW5), ID 13534128
1 yr$86$50 – $271new style (mirrors mount on door skin), 220 amp (opt KW5), ID 13534129
1 yr$98$50 – $246Common questions
GMC Sierra 1500 alternator (170 amp (opt KW7)) FAQ
How much is a used GMC Sierra 1500 alternator (170 amp (opt KW7))?
Based on 141 priced salvage-yard listings across 3 model years, a used GMC Sierra 1500 alternator in the 170 amp (opt KW7) variant lists between $50 and $311, with a median asking price of $165.
Which GMC Sierra 1500 years use the 170 amp (opt KW7) alternator?
The 170 amp (opt KW7) variant appears in model years 2020, 2021, 2025. Prices and availability differ by year.
Is there a price difference between 170 amp (opt KW7) condition grades?
Yes. Grade A has a median of $169, Grade B has a median of $97, Grade C has a median of $80. Grade A parts are in excellent condition, B is good, and C is fair.