GMC Terrain transmission control module — Transmission, (external trans mounted) price snapshot
- Low
- $80
- Average
- $141
- High
- $331
Trim-specific price guide
GMC Terrain Transmission Control Module — Transmission, (external trans mounted) prices
Pricing for the Transmission, (external trans mounted) variant of the GMC Terrain transmission control module, aggregated from 37 salvage yard listings across 2 model years.
Price summary
A used GMC Terrain transmission control module (Transmission, (external trans mounted)) costs $80 to $331, with a median asking price of $99. Based on 37 priced salvage yard listings across the US, updated Sep 13, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$99
Grade B (good)$99
USD
Condition comparison
Price by part grade
Grade AClean / low wear$80–$33122 listings
Grade BStandard used$99–$32414 listings
Grade CVisible wearUpdating
Grade XUngraded$99–$991 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $80–$331 | 22 | |
| Grade BStandard used | $99–$324 | 14 | |
| Grade CVisible wear | Updating | — | |
| Grade XUngraded | $99–$99 | 1 |
Median by grade
Grade price comparison
Grade A$99
Grade B$99
Ungraded$99
Median asking price by seller-reported condition grade · $80–$331 overall range
Trim-specific context
How is the Transmission, (external trans mounted) priced differently?
This pricing covers the Transmission, (external trans mounted) variant of the GMC Terrain transmission control module, based on 37 priced listings across 2 model years (2018, 2019). Its $99 median is 32% above the GMC Terrain transmission control module overall median of $75.
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 Transmission, (external trans mounted) cost by year?
Other trims
Other GMC Terrain transmission control module variants
Door, (liftgate)
3 yrs$90$41 – $282Memory, (below LH seat), (heat control, opt KA1), (memory)
3 yrs$100$45 – $322Seat, (below LH seat), (heat control, opt KA1), (vent fan)
3 yrs$56$40 – $348Theft-Locking, (door lock, rear view mirror)
3 yrs$50$35 – $232Air Bag, (below center console)
6 yrs$82$41 – $336Driver Assist, (rear park assist, opt UD7), (LH quarter panel)
3 yrs$75$25 – $249Body Control (BCM), (LH side dash), body control
4 yrs$85$50 – $343Differential Lock, (carrier housing)
6 yrs$76$35 – $305Temperature, electronic temperature control (opt C68)
2 yrs$66$41 – $305Common questions
GMC Terrain transmission control module (Transmission, (external trans mounted)) FAQ
How much is a used GMC Terrain transmission control module (Transmission, (external trans mounted))?
Based on 37 priced salvage-yard listings across 2 model years, a used GMC Terrain transmission control module in the Transmission, (external trans mounted) variant lists between $80 and $331, with a median asking price of $99.
Which GMC Terrain years use the Transmission, (external trans mounted) transmission control module?
The Transmission, (external trans mounted) variant appears in model years 2018, 2019. Prices and availability differ by year.
Is there a price difference between Transmission, (external trans mounted) condition grades?
Yes. Grade A has a median of $99, Grade B has a median of $99. Grade A parts are in excellent condition, B is good, and C is fair.