The 2017 GMC Terrain commonly uses 28-inch driver-side and 17-inch passenger-side front wiper blades, with an 11-inch rear blade. These sizes fit the standard windshield design, but always verify for your specific vehicle before purchasing replacements.
Standard front wiper sizes
The following sizes are typical for the Terrain’s front wipers. Exact fits can vary slightly by production batch or trim, so use these as a baseline and confirm with your vehicle’s documentation or a parts retailer.
- Driver-side front blade: 28 inches
- Passenger-side front blade: 17 inches
In most cases, these two lengths provide full coverage across the windshield with proper arm articulation.
Rear wiper size
The rear wiper on the 2017 Terrain is a smaller blade designed for the rear window.
- Rear blade: 11 inches
Rear wiper blades are often sold in single-size packs; ensure you select an 11-inch blade for a proper fit on the tailgate window.
How to confirm the exact size for your vehicle
To avoid buying the wrong blades, verify the sizes for your specific vehicle model and production year. Use these steps to confirm before you shop:
- Check the owner's manual or the glovebox/inside cover for the recommended blade sizes.
- Inspect the current blades for stamped length numbers or manufacturer part numbers that indicate size.
- Measure the blade lengths on your current wipers if the sizes aren’t printed on the blades themselves.
- Know your installation type (hook, bayonet, or other connector) to ensure compatibility with the wiper arms.
- When in doubt, provide your VIN to a parts retailer or consult the GMC parts catalog to confirm exact sizes for your specific vehicle.
Following these steps helps ensure you buy the correct sizes and fitment for your 2017 Terrain.
Tips for choosing blade type and features
Size is just one factor. Blade construction and climate-related features can affect performance and longevity.
Blade types to consider
- Beam (advances even contact across the windshield and tends to perform well in diverse conditions)
- Conventional (a traditional frame design; often more affordable)
- Hybrid (a blend of beam and conventional designs for balance of coverage and durability)
For harsh winters or sunny climates, you may also consider winter-rated blades or silicone blades for longer life and smoother operation.
Summary
For a 2017 GMC Terrain, plan for front blades of 28 inches on the driver’s side and 17 inches on the passenger’s side, plus a rear blade of 11 inches. Always double-check with your owner's manual, the vehicle’s VIN, or a trusted parts retailer to account for any minor variations by trim or production date. Regular replacement ensures clear visibility in all weather conditions.