GMC Mileage Blockers
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Plug-and-play mileage blockers for GMC’s full-size trucks, SUVs and electric models, including the Sierra, Yukon, Canyon and Hummer EV. Every GMC module keeps the speedometer working and is backed by a 12-month warranty.
GMC models we cover
- Pickups: Sierra 4th Gen (2014–2019), Sierra 5th Gen (2020–2026), Canyon Gen 2 (2015–2022), Canyon AT4/AT4X (2023–2026)
- SUVs: Yukon 4th Gen (2014–2020), Yukon 5th Gen (2020–2026), Acadia II (2017–2024), Acadia III (2024–2026), Terrain (2025–2026)
- Electric: Hummer EV (2022–2026), Sierra EV (2025–2026)
Newer generations: long cable and app control
The latest GMC modules come with a long cable and app control, so you can switch the blocker on or off from your phone. That covers the Acadia III, Canyon AT4/AT4X, Hummer EV, Sierra 5th Gen, Sierra EV, Terrain and Yukon 5th Gen. The modules for the Acadia II, Canyon Gen 2, Sierra 4th Gen and Yukon 4th Gen are standard plug-and-play units.
Fitting
Each blocker installs behind the instrument cluster with no cutting or soldering. You’ll receive DIY instructions and can have a free video call if you’d like help. If you’d rather leave it to us, choose our nationwide fitting service (UK only). Express tracked shipping is available.
FAQs
Which Sierra or Yukon blocker do I need? The 4th and 5th generations use different modules. Check your model year or send us your registration.
Do you cover the electric Hummer and Sierra? Yes. The Hummer EV and Sierra EV each have their own module with a working speedometer.
Are mileage blockers legal? Fitting and using a blocker for testing, diagnostics, track days or off-road use is legal in the UK. It is illegal to mislead a buyer about a vehicle’s mileage, so always declare it when selling.