2018 GMC Sierra 1500 differential price snapshot
- Low
- $500
- Average
- $750
- High
- $1,000

Year-specific price guide
A used 2018 GMC Sierra 1500 differential costs $500 to $1,000, with a median asking price of $1,000. Based on 4 priced salvage yard listings across the US, updated Sep 3, 2026. Prices exclude shipping, core charges, and installation.
Condition comparison
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $500–$500 | 2 | |
| Grade BStandard used | $1,000–$1,000 | 2 | |
| Grade CVisible wear | Updating | — | |
| Grade XUngraded | Updating | — |
Median by grade
Median asking price by seller-reported condition grade · $500–$1,000 overall range
Fitment matters
Year-specific context
The 2018 guide is based on 4 observed listings, including 4 with posted prices. Its $1,000 median is 0% above the GMC Sierra 1500 guide's $1,000 median.
Among the 1 model years with current price data, 2018 ranks #1 from lowest to highest median.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Compare model years
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Common questions
Based on 4 priced salvage-yard listings, a used 2018 GMC Sierra 1500 differential lists between $500 and $1,000, with a median asking price of $1,000.
This price guide does not confirm interchangeability. Check the seller's part number, drivetrain, trim or variant, and your VIN before buying; parts from the same model can use different fitments in the same year.
A diff is another name for a differential. The prices on this page cover the 2018 GMC Sierra 1500 differential — median $1,000, from 4 listings.