2018 GMC Terrain transmission control module — Driver Assist, rear park assist (opt UD7), (RH quarter panel) price snapshot
- Low
- $24
- Average
- $78
- High
- $153

Year & trim-specific price guide
A used 2018 GMC Terrain transmission control module (Driver Assist, rear park assist (opt UD7), (RH quarter panel)) costs $24 to $153, with a median asking price of $66. Based on 39 priced salvage yard listings across the US, updated Sep 13, 2026. Prices exclude shipping, core charges, and installation.
Condition comparison
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $24–$153 | 17 | |
| Grade BStandard used | $52–$147 | 13 | |
| Grade CVisible wear | Updating | — | |
| Grade XUngraded | $30–$75 | 9 |
Median by grade
Median asking price by seller-reported condition grade · $24–$153 overall range
Trim-specific context
This pricing covers the Driver Assist, rear park assist (opt UD7), (RH quarter panel) variant of the 2018 GMC Terrain transmission control module, based on 39 priced listings. Its $66 median is 7% below the 2018 GMC Terrain transmission control module overall median of $71.
There are 36 other transmission control module variants available for the 2018 GMC Terrain.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Same trim, other years
Same year, other trims
Back to full guide
Common questions
Based on 39 priced salvage-yard listings, a used 2018 GMC Terrain transmission control module in the Driver Assist, rear park assist (opt UD7), (RH quarter panel) variant lists between $24 and $153, with a median asking price of $66.
The Driver Assist, rear park assist (opt UD7), (RH quarter panel) variant appears in model years 2018, 2019. Prices and availability may differ by year.