ATC Truck Cap Parts & Accessories
Factory replacement windows engineered specifically for ATC truck caps. Each assembly includes tempered safety glass, weatherstripping, and mounting hardware sized to match your cap’s original specifications.
Designed for direct fitment on all current ATC models. The installation process requires basic hand tools and takes 30-45 minutes per window.
Component specifications
Materials & Construction Standards
Every ATC truck cap part we stock meets the same manufacturing tolerances we use for complete cap assemblies. Lock cylinders use marine-grade brass tumblers that resist corrosion in salt-belt climates and coastal regions. Our hinge forgings undergo powder coating in electrostatic ovens to create a finish that bonds at the molecular level, preventing rust from forming under the coating layer.
Weatherstripping compounds carry ASTM D2000 ratings for ozone resistance and temperature cycling. We test every seal profile against pressure differentials up to 60 mph wind velocity to verify water and dust intrusion thresholds. Glass assemblies ship with DOT-certified tempered panels that meet Federal Motor Vehicle Safety Standard 205 for glazing materials.
Compatibility Across Cap Models
Parts compatibility varies by cap series and production year. Our Sport, Sport LTD, and Avalanche lines share the same window frame dimensions, allowing one glass assembly part number to serve multiple models. Lock cylinders changed to a larger-diameter cam design in 2010, so earlier caps require adapter plates sold separately.
Hinge bolt patterns remained consistent from 2005 forward, but swing gate hinges use a different spacing than side-access door hinges. The same EPDM seal extrusion runs along door perimeters for all current models, though pre-2008 caps used a slightly thinner profile. We maintain inventory for discontinued styles dating back to 1995.
Installation & Fastener Specifications
Window assemblies mount with stainless steel machine screws torqued to 45 inch-pounds to compress the gasket without cracking the glass. Lock cylinder installation requires a 1-1/8 inch hole saw for new installations, though replacement into existing holes needs only the cylinder and retaining clip.
Hinge Replacement Process
Hinge swaps take 20-30 minutes per door when you support the panel weight during bolt removal. We include nylon-insert lock nuts that maintain preload through vibration cycles without backing off. Weatherstripping adheres best to surfaces cleaned with isopropyl alcohol and allowed to flash off for two minutes before peel-and-stick application. Seal corners require miter cuts at 45-degree angles to prevent puckering where vertical and horizontal runs meet. The pressure-sensitive adhesive reaches full bond strength after 24 hours, so we recommend keeping doors closed during the cure period.
Essential Parts for ATC Caps
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Common Questions About ATC Cap Parts
Check the metal data plate riveted to the inside of your cap near the front driver-side corner. It lists your model name, production year, and a build code we use to cross-reference compatible parts. You can also measure the window opening dimensions or photograph the existing part and send it to our parts team for verification before ordering.
For caps manufactured before 2005, we recommend calling with your truck make, model, and bed length so we can confirm the correct seal profile and hardware thread sizes.
You can replace a single cylinder if only one is damaged, but the new lock will require a different key than your existing one unless you order a keyed-alike set. Most customers replace both cylinders at once to maintain single-key convenience across all cap access points.
If you have the original key code stamped on the lock face, we can cut cylinders to match that existing pattern for an additional fee.
Window replacement requires a #2 Phillips screwdriver and a razor blade to remove old adhesive residue. Lock cylinder installation needs a 1-1/8 inch hole saw if drilling new holes, or just a flathead screwdriver for swapping existing cylinders. Hinge replacement takes a 7/16 inch socket, a ratchet, and an adjustable wrench to hold the nut while loosening the bolt.
Weatherstripping installation is tool-free except for a utility knife to trim seals to length and cut miter joints at corners.
EPDM rubber weatherstripping typically maintains a good seal for seven to ten years under normal use. Caps parked outdoors in direct sunlight degrade faster due to UV exposure, while garage-stored caps often exceed ten years. Compression set from repeated door cycles eventually prevents the seal from rebounding to its original thickness.
Early warning signs include wind noise at highway speeds, visible gaps between the seal and door frame, or water intrusion during car washes.
Glass assemblies carry a lifetime warranty against spontaneous breakage or delamination not caused by impact. Lock cylinders and hinges include a five-year limited warranty covering mechanical failure and finish defects. Weatherstripping has a two-year warranty against splitting, cracking, or adhesive failure under normal weather exposure.
Warranty claims require proof of purchase and photographs showing the defect. We cover parts replacement but not labor costs for installation.
We maintain inventory for discontinued models dating back to 1995, though availability varies by part type. Common components like weatherstripping and standard lock cylinders remain in stock for most legacy models. Specialty items like tinted glass assemblies or unique hinge configurations may require a two to three week lead time for production.
Call our parts desk with your cap’s data plate information, and we can confirm current stock status for specific components.
Yes, all our glass assemblies ship in both clear and tinted options at the same price point. Tinted glass reduces interior heat buildup by approximately 30% during summer months and provides privacy for cargo stored in the bed. The tint is embedded in the glass during tempering, not applied as a film, so it will not bubble or peel over time.
If you originally had clear glass, switching to tinted requires no additional hardware or modifications to the mounting frame.