The GMC Sierra commonly uses a 22-inch blade on the driver's side and a 20-inch blade on the passenger side, but exact sizes vary by model year and configuration.
Common sizing patterns for Sierra models
These sizes reflect what you’ll typically find on many Sierra 1500/2500/3500 pickups from recent years. Always double-check for your specific year and trim.
- Driver-side blade: 22 inches
- Passenger-side blade: 20 inches
Note that some model years or trims may use a different passenger length or a two-blade setup that pairs with a factory spacer. Always confirm for your exact vehicle.
How to confirm the exact blade size for your Sierra
To ensure you buy the correct fit, use one of these reliable methods:
- Refer to the owner’s manual section on wipers for the recommended blade lengths.
- Look at the markings on your current blades or the packaging when new; most blades list their size on the core or sticker.
- Use GM’s official parts catalog or a trusted parts retailer: enter your year, model (Sierra 1500/2500/3500), and trim, then check the wiper blade fitment.
- Visit an auto parts store with your vehicle details to have the correct size confirmed by a clerk or use their online lookup tool with your VIN.
Using the exact size prevents improper fit, chattering, and streaking and ensures optimal visibility during inclement weather.
Notes for Sierra HD (2500/3500) vs 1500
Heavy‑duty Sierra models (2500/3500) generally align with the same blade lengths as 1500s, but there can be year‑to‑year differences due to body styling changes or headlight/wiper assembly revisions. Always verify by model year or VIN when purchasing replacements.
Summary
In short, while 22 inches on the driver’s side and 20 inches on the passenger side are typical for many GMC Sierra pickups, sizes can vary by year and trim. Check your owner’s manual, inspect your current blades, or use a VIN‑based parts lookup to confirm the exact replacement blades for your specific Sierra.