2018 GMC Sierra 1500 alternator — 2.5L price snapshot
- Low
- $40
- Average
- $109
- High
- $282
Year & trim-specific price guide
Used 2018 GMC Sierra 1500 Alternator — 2.5L prices
Trim-specific pricing for the 2.5L variant of the 2018 GMC Sierra 1500 alternator, built from 48 real salvage yard listings with condition grade detail.
Price summary
A used 2018 GMC Sierra 1500 alternator (2.5L) costs $40 to $282, with a median asking price of $76. Based on 48 priced salvage yard listings across the US, updated Aug 20, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$90
Grade B (good)$87
USD
Condition comparison
Price by part grade
Grade AClean / low wear$40–$28235 listings
Grade BStandard used$75–$993 listings
Grade CVisible wearUpdating
Grade XUngraded$40–$15010 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $40–$282 | 35 | |
| Grade BStandard used | $75–$99 | 3 | |
| Grade CVisible wear | Updating | — | |
| Grade XUngraded | $40–$150 | 10 |
Median by grade
Grade price comparison
Grade A$90
Grade B$87
Ungraded$75
Median asking price by seller-reported condition grade · $40–$282 overall range
Trim-specific context
How does the 2.5L compare?
This pricing covers the 2.5L variant of the 2018 GMC Sierra 1500 alternator, based on 48 priced listings. Its $76 median is 0% above the 2018 GMC Sierra 1500 alternator overall median of $76.
There is 1 other alternator variant available for the 2018 GMC Sierra 1500.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Same year, other trims
What other 2018 GMC Sierra 1500 alternator variants are available?
Back to full guide
2018 GMC Sierra 1500 alternator — all trims
Common questions
2018 GMC Sierra 1500 alternator (2.5L) FAQ
How much is a used 2018 GMC Sierra 1500 alternator (2.5L)?
Based on 48 priced salvage-yard listings, a used 2018 GMC Sierra 1500 alternator in the 2.5L variant lists between $40 and $282, with a median asking price of $76.
Which years use the 2.5L alternator?
In our current dataset, the 2.5L variant appears only for the 2018 model year.