Replace Century truck cap glass
The short answer
To replace broken glass on a Century truck cap, first identify your exact cap model and its build or serial information, then order the matching pane or window assembly through a Century dealer or a truck cap parts supplier that can look up that model. Cap glass is usually shaped and sized for a specific cap design, so a generic pane is unlikely to fit. Three things change the answer: which window is damaged (rear door, side, or front), whether your cap model is still supported with parts, and whether you need to match a factory tint.
Identify your cap before you order
Fit depends on the cap, not just the truck. Two caps for the same truck can use different glass if they are different Century models or production years. Before you contact a supplier, gather the following.
Cap model name and approximate year of manufacture; Serial number or build label, which is often found on a sticker or plate inside the cap; check along the front wall, side rails, or door frame; The truck make, model, year, and bed length the cap was built for; Which window is damaged: rear door, a side window, or the front window; Window style: fixed, sliding, or flip-up, and whether the rear door is framed or frameless; Tint shade, if you want it to match the remaining glass; Photos of the damaged window, the hinges or frame, and the label
If the label is missing or unreadable, a dealer may still be able to identify the cap from photos and measurements, but expect more back-and-forth. The supplied information does not confirm where the label sits on every Century model, so check several locations.
Pane only, or the whole window assembly
Some repairs need only the glass. Others need the full window unit, depending on how the window is built.
Window | What you may need to order | Why; Rear door, frameless | Often the complete glass door with hardware, or the glass plus hinges, lock, and gas struts | On frameless doors the glass is the door, and hardware attaches directly to it; Rear door, framed | Possibly the glass alone, set into the existing frame | The frame carries the hinges and lock, so it may be reusable if undamaged; Side window, sliding or fixed | The glass, or the full window unit with frame and seals | Sliding units have tracks and latches that may be sold only as an assembly; Front window | The glass and its seal | Usually a fixed pane held in a rubber or bonded seal
This table describes common truck cap construction in general. Confirm with the supplier which parts are sold separately for your specific Century model.
Why a local glass shop may not be able to cut a pane
Truck cap windows are commonly made from tempered safety glass. Tempered glass is heat-treated so it breaks into small pieces rather than sharp shards. It cannot be cut or drilled after tempering, so a shop cannot trim a stock sheet to fit. The pane has to be made to the correct shape from the start, including any hinge or latch holes. That is why manufacturer or dealer-sourced glass is usually the most reliable route for curved panes or panes with drilled holes.
A local auto or flat glass shop may still help with flat, undrilled side or front panes if it can fabricate tempered glass from a template. Ask whether the shop can match the shape, tint, and edge finish, and whether the result meets safety glass requirements for vehicle use.
Sourcing options
Century dealer or truck cap dealer: the most direct way to get model-specific glass or door assemblies; the dealer may order through the manufacturer; Truck cap parts suppliers: may stock common rear doors, side windows, and hardware; confirm fit using your model and serial information; Auto or flat glass shops: an option for some flat panes if they can produce tempered glass to shape; Used or salvage caps: a cap of the same model may supply a matching window, especially for discontinued models; check the glass, seals, and hardware condition
Ordering checklist
Confirm the part matches your cap model and year, not only your truck; Ask whether the price includes hinges, struts, lock, seals, and adhesive or fasteners; Confirm the tint shade and whether it will match your other windows; Ask about lead time, since model-specific glass may be made to order; For discontinued caps, ask whether a current part is listed as a compatible replacement; Ask whether the supplier or dealer can install it, and whether installation affects any warranty
Before installation
If the rear door broke, clear all glass fragments from the bed, the cap seals, and the hinge area before fitting the new piece. Check the gas struts on any lift-up door. A weak strut can let a heavy glass door drop. Inspect the weatherstripping as well, since a damaged seal can leak even with new glass. If the replacement is bonded rather than bolted, follow the supplier's instructions for adhesive and cure time. Frameless rear doors are heavy and awkward to position, so plan for two people.
What this guide cannot confirm
No source information was available for Century part numbers, prices, current parts availability, lead times, or which models are discontinued. Glass fit, tint options, and whether hardware is sold separately can differ by cap model and production year. Confirm these details with a dealer or supplier using your cap's serial information before you buy.