Truck caps, also known as truck toppers or bed caps, are a popular accessory for pickup trucks. They offer secure storage, weather protection, and can even transform your truck bed into a comfortable camping space. If you own a 2012 or 2013 GMC Sierra with a short bed, you might be wondering if a cap designed for one model year will fit the other. The question, "Will a cap off a 2012 Sierra short box fit a 2013 short box?" is crucial for anyone looking to buy a used cap or upgrade their truck. This article will delve into the intricacies of truck bed dimensions, compatibility factors, potential challenges, and provide you with all the information you need to make an informed decision.
Understanding the Importance of Proper Fit
Will A Cap Off 2012 Sierra Short Box Fit 2013 Short Box? A Comprehensive Guide
Before we dive into the specifics, it's essential to understand why a proper fit is paramount. A poorly fitting truck cap can lead to several problems:
- Leaks: Gaps between the cap and the truck bed allow rain, snow, and dust to enter, defeating the purpose of having a cap.
- Damage: An improperly secured cap can shift and rub against the truck's paint, causing scratches and dents.
- Safety: An unstable cap poses a safety hazard to yourself and other drivers. It could detach during driving, especially at high speeds or in windy conditions.
- Aesthetics: A poorly fitting cap looks unprofessional and detracts from the overall appearance of your truck.
Therefore, confirming compatibility is a critical step before investing in a truck cap.
Analyzing Bed Dimensions: Are 2012 and 2013 Sierra Short Boxes Identical?
The most crucial factor determining compatibility is the truck bed's dimensions. Generally, the 2012 and 2013 GMC Sierra short box trucks share the same bed dimensions. This is because the GMC Sierra underwent a significant redesign in 2014. The 2007-2013 generation is largely consistent in its bed design, making it likely that a cap designed for a 2012 short box will fit a 2013 short box.
However, "likely" isn't a guarantee. Subtle variations or aftermarket modifications can affect the fit. Here's what you need to consider:
- Short Bed Definition: Ensure both trucks have the standard short bed configuration. The Sierra was available with multiple bed lengths, including a standard (6.5 feet) and long bed (8 feet). We are focusing exclusively on the short bed configuration, which is approximately 5 feet 8 inches (68 inches) in length.
- Factory vs. Aftermarket: Check if either truck has had any modifications to the bed, such as spray-in bed liners that might add thickness or alterations to the bed rails.
- Trim Levels: While unlikely, subtle differences in trim levels could potentially influence bed dimensions. Double-check specifications if there's any doubt.
Key Considerations Beyond Bed Dimensions: What Else Matters?
Even if the bed dimensions are identical, several other factors can influence compatibility:
- Cab Configuration: The cab configuration (regular cab, extended cab, crew cab) doesn't directly affect the bed itself, but it impacts the cap's front profile. A cap designed for a specific cab configuration might not fit well on a different one. Since we're focusing on short beds, this consideration is less critical but still worth noting.
- Bed Rail Caps: The thickness of the bed rail caps can affect the cap's seating. If one truck has thicker bed rail caps than the other, the cap might not sit flush.
- Tailgate Design: While less common, variations in tailgate design (especially if aftermarket) can create interference with the cap's rear door.
- Cap Manufacturer and Model: Different cap manufacturers might have slightly different designs, even for the same truck model and year. The specific model of the cap also matters (e.g., a high-rise cap versus a standard height cap).
- Mounting Hardware: Ensure that the mounting hardware (clamps, bolts, etc.) is compatible with both trucks. Different caps might use different types of hardware.
Practical Steps to Verify Compatibility Before Purchasing
Here's a step-by-step guide to ensure a proper fit:
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Measure, Measure, Measure:
- Accurately measure the inside length and width of both truck beds. Pay close attention to the distance between the bed rails.
- Measure the height of the bed rails from the truck bed floor.
- Compare these measurements to the cap's specifications (if available).
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Visual Inspection:
- Carefully inspect both truck beds for any signs of damage or modification.
- Compare the bed rail caps and tailgate designs.
- Examine the cap's condition, looking for any warping, cracks, or other damage that could affect the fit.
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Test Fit (Ideal):
- If possible, test fit the cap on the 2013 Sierra before purchasing. This is the most reliable way to ensure compatibility.
- Check for even seating on the bed rails and proper alignment with the tailgate.
- Ensure that the cap doors open and close smoothly without any interference.
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Consult a Professional:
- If you're unsure about compatibility, consult a truck accessory dealer or a professional installer. They can provide expert advice and help you select the right cap for your truck.
Potential Challenges and Solutions
Even with careful planning, you might encounter some challenges:
- Minor Fit Issues: Small gaps or misalignments can often be addressed with shims or weather stripping.
- Hardware Compatibility: If the mounting hardware isn't compatible, you might need to purchase new hardware.
- Cap Damage: If the cap is damaged, repairs might be necessary before installation.
- Color Mismatch: The cap's color might not perfectly match your truck's paint. You can consider repainting the cap to achieve a seamless look.
Price Guide for Used and New Truck Caps
| Factor | Description | Price Range (USD) |
|---|---|---|
| Used Cap (General) | Basic fiberglass or aluminum cap, good condition, minimal features. | $300 - $1000 |
| Used Cap (Premium) | High-end cap with features like side windows, interior lighting, carpeted interior, good condition. | $800 - $1500 |
| New Cap (Basic) | Entry-level fiberglass or aluminum cap, standard features, no customization. | $1200 - $2500 |
| New Cap (Mid-Range) | Fiberglass cap with side windows, interior lighting, carpeted interior, basic customization options. | $2500 - $4000 |
| New Cap (Premium) | High-end fiberglass or aluminum cap with advanced features, extensive customization, durable construction. | $4000+ |
| Installation Costs | Professional installation of a truck cap, including wiring (if applicable). | $100 - $300 |
| Painting (Optional) | Repainting a used or new cap to match the truck's color. | $300 - $800 |
Note: Prices can vary significantly based on location, brand, features, and condition.
Conclusion
In most cases, a truck cap designed for a 2012 GMC Sierra short box will fit a 2013 GMC Sierra short box. However, due diligence is crucial. Thoroughly inspect both trucks and the cap, measure the bed dimensions, and consider all the factors outlined in this guide. If possible, a test fit is the best way to ensure compatibility. By taking these steps, you can confidently purchase a truck cap and enjoy the added functionality and protection it provides.
Frequently Asked Questions (FAQ)
Q: Will a cap from a 2012 Chevy Silverado short box fit a 2013 GMC Sierra short box?
A: Yes, the 2012 Chevy Silverado and 2013 GMC Sierra share the same body platform, so a cap designed for one should generally fit the other, assuming both have the short bed configuration. However, it's always recommended to verify the fit before purchasing.
Q: Can I install a truck cap myself, or should I hire a professional?
A: You can install a truck cap yourself if you have basic mechanical skills and the necessary tools. However, professional installation is recommended to ensure proper fit, sealing, and wiring (if applicable).
Q: What is the best way to seal a truck cap to prevent leaks?
A: Use high-quality weather stripping along the bed rails and tailgate. Ensure that the cap is properly aligned and secured to the truck bed. Consider using silicone sealant in areas prone to leaks.
Q: What are the benefits of a truck cap?
A: Truck caps offer secure storage, weather protection, increased cargo capacity, improved fuel efficiency, and can transform your truck bed into a comfortable sleeping area.
Q: Where can I buy a truck cap?
A: You can buy truck caps from truck accessory dealers, online retailers, and used marketplaces. Be sure to compare prices and read reviews before making a purchase.