The 2008 Chevrolet Silverado has the newer style and more rare "pinch tab" wiper arms. See sources and related links below for installation videos. Also, purchase the replacement blades first and there will be additional instructions/illustrations on the replacement packages - note that not all wipers will fit on pinch tab arms so be sure to reference the make, model and year of your vehicle for the brand wipers you choose to purchase. Pinch-tab compatible wipers are a little bit trickier to find. Locate and press the tabs where the wiper blade meets the wiper arm then tip or rotate the wiper down out of the tab attachment, then rotate slightly so you can remove the little hook at the end out of the hole. The video below shows this in the reverse order but you'll get it.
What are you removing? The blades or the arms
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The 2004 Chevrolet Silverado takes 22" replacement windshield wiper blades on both sides front.
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The 1999-2010 Chevy Silverado Series Pickup takes 22" replacement wiper blades on both sides front.
Yes - you have many options - they are called "Beam Blades"
The 1993 Chevrolet C1500 Silverado takes 18" wiper blades on both sides front. See related link below. To ensure correct attachment as well as length, always lookup the exact wiper blade part numbers by vehicle make, model and year. There are 22+ wiper arm attachments and not all wiper blades fit all wiper arms.
The 2005 Chevrolet Silverado Series Pickup takes 22" replacement windshield wiper blades on both sides front.
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2003 Chevrolet Silverado Pickup: 22" replacement wiper blades both sides front 2003 S Series Pickup: 20" replacement wiper blades both sides front See sources and related links below for more information.
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