Will A Cap Off 2012 Sierra Short Box Fit 2013 Short Box? A Comprehensive Guide

Will A Cap Off 2012 Sierra Short Box Fit 2013 Short Box? A Comprehensive Guide Usedtruck.Truckstrend.Com

Adding a truck cap, also known as a bed cap or camper shell, is a popular way to enhance the utility of your pickup truck. It provides secure, weather-protected storage, turning your truck bed into a versatile cargo area. If you own a 2013 GMC Sierra short box and have access to a cap that previously fitted a 2012 Sierra short box, you're likely wondering if it will fit. The answer, while leaning towards a "likely yes," requires careful consideration of several factors. This comprehensive guide will walk you through everything you need to know to determine if that 2012 cap will be a suitable match for your 2013 Sierra.

Introduction: The Truck Cap Compatibility Question

Will A Cap Off 2012 Sierra Short Box Fit 2013 Short Box? A Comprehensive Guide

Truck caps aren't one-size-fits-all. While truck manufacturers often maintain consistent bed dimensions within specific model generations, subtle variations and model year changes can affect compatibility. Therefore, assuming a direct fit based solely on the year and "short box" designation can be risky. This article aims to provide you with the knowledge to make an informed decision, saving you time, money, and potential frustration. We'll explore crucial dimensions, potential compatibility issues, and practical steps to ensure a proper fit.

Section 1: Understanding the 2012-2013 GMC Sierra Short Box Dimensions

The most critical factor in determining cap compatibility is the truck bed's dimensions. Fortunately, for the 2012 and 2013 GMC Sierra, the short box dimensions are generally considered to be the same within the same cab configuration (e.g., extended cab, crew cab). This is because both years fall within the same generation of the Sierra (2007-2013, often referred to as the GMT900 platform).

Here are the approximate dimensions of the short box for these model years:

• Length: Approximately 69.3 inches (5 ft 9.3 inches) - This is the most critical dimension.
• Width (Inside Bed): Approximately 60.2 inches
• Width (Between Wheel Wells): Approximately 50.9 inches

• Bed Depth (Inside): Approximately 22.4 inches

Why Dimensions Matter: A cap designed for a slightly different bed length, even by an inch or two, may not seal properly, leading to leaks and potential damage. Discrepancies in width can prevent the cap from sitting flush with the truck's bed rails.

Actionable Insight: Before proceeding further, use a measuring tape to verify the actual bed length of your 2013 Sierra. Don't rely solely on the factory specifications, as bedliners or spray-in bed coatings can slightly alter these dimensions.

Section 2: Factors Affecting Truck Cap Compatibility Beyond Dimensions

While the bed dimensions are paramount, other factors can influence whether a 2012 cap will fit a 2013 Sierra:

• Cab Configuration: Caps are designed to match specific cab configurations (regular cab, extended cab, crew cab). A cap designed for an extended cab short box will not fit a crew cab short box, even if the bed length is the same. The cab's shape affects the front of the cap's design, impacting its ability to sit flush against the truck's cab.
• Bed Rail Design: Even within the same generation, minor variations in the bed rail design can occur. The cap's clamping mechanism is designed to grip the bed rails securely. Subtle differences in the rail's shape can impact the effectiveness of the clamps.
• Bed Liner/Spray-In Coating: As mentioned earlier, bed liners and spray-in coatings can slightly alter the bed's interior dimensions and the height of the bed rails. This can affect the cap's ability to sit flush and seal correctly.

• Cap Manufacturer and Model: Different cap manufacturers have their own tolerances and design characteristics. A cap from one manufacturer may fit slightly differently than a cap from another, even if both are designed for the same truck model and year.
• Previous Damage/Modifications: Inspect both the truck bed and the cap for any previous damage or modifications. A bent bed rail or a damaged cap frame can prevent a proper fit.
• Wiring Harness Compatibility (If Applicable): Some caps include interior lighting or remote locking mechanisms. If the 2012 cap has these features, ensure the wiring harness is compatible with your 2013 Sierra's electrical system. Adapters may be required.

Actionable Insight: Identify the cab configuration of both the 2012 truck the cap came from and your 2013 Sierra. Carefully inspect the bed rails for any visible differences or damage.

Section 3: The Test Fit: A Step-by-Step Guide

The best way to determine compatibility is to perform a test fit. Here's how:

1. Prepare the Truck Bed: Remove any cargo or obstructions from the truck bed. Clean the bed rails thoroughly to ensure a clean surface for the cap to sit on.
2. Carefully Position the Cap: With assistance, carefully lift the cap and position it onto the truck bed. Align the front of the cap with the truck's cab.
3. Check for Alignment: Visually inspect the cap to ensure it sits evenly on the bed rails. Pay close attention to the gap between the cap and the truck's cab. It should be consistent and minimal.
4. Inspect the Bed Rail Contact: Walk around the truck and examine how the cap sits on the bed rails. Ensure there are no significant gaps or pressure points. The cap should make even contact with the rails.
5. Test the Clamps: Attempt to install the cap's clamping mechanism. Do the clamps grip the bed rails securely? Are they able to tighten properly without excessive force?
6. Check Tailgate Clearance: Ensure the cap's rear door or window clears the tailgate when it's opened and closed.
7. (Optional) Water Test: If possible, perform a water test by spraying water around the perimeter of the cap with a garden hose. Check for any leaks inside the truck bed.

Important Considerations During the Test Fit:

• Safety First: Always lift and move the cap with assistance. Truck caps can be heavy and awkward to handle.
• Avoid Forcing: If the cap doesn't seem to fit properly, don't force it. This can damage the cap or the truck bed.
• Document Observations: Take photos or notes of any areas where the fit is questionable. This will help you identify potential solutions.

Section 4: Addressing Common Compatibility Issues and Solutions

Even if the dimensions are correct, you might encounter minor fitment issues. Here are some common problems and their potential solutions:

• Gaps Between Cap and Cab: If there's a small gap between the cap and the cab, you can use weather stripping or foam tape to seal it.
• Clamp Incompatibility: If the clamps don't fit the bed rails properly, you may be able to purchase aftermarket clamps that are compatible with your specific truck model.
• Bed Liner Interference: If the bed liner is preventing the cap from sitting flush, you may need to trim the bed liner slightly around the bed rails.
• Leaks: Seal any leaks with silicone sealant specifically designed for automotive applications.

Actionable Insight: If you encounter any issues during the test fit, consult with a local truck accessory shop or a cap dealer. They can offer expert advice and suggest appropriate solutions.

Section 5: Pros and Cons of Using a Second-Hand Truck Cap

Pros:

• Cost Savings: Used truck caps are typically significantly cheaper than new ones.
• Availability: You might find a used cap that matches your truck's color and style.
• Environmental Benefits: Reusing a truck cap is a more sustainable option than buying new.

Cons:

• Potential for Damage: Used caps may have scratches, dents, or other damage.
• Wear and Tear: The seals and hardware on a used cap may be worn or damaged.
• Limited Warranty: Used caps typically don't come with a warranty.
• Compatibility Issues: As discussed throughout this article, ensuring compatibility can be challenging.

Actionable Insight: Weigh the pros and cons carefully before deciding to purchase a used truck cap. Factor in the potential costs of repairs and modifications.

Section 6: Alternatives to a Truck Cap

If you're unsure about using a truck cap, consider these alternatives:

• Tonneau Cover: Tonneau covers offer weather protection and security, but they don't provide the same amount of interior space as a truck cap.
• Truck Bed Tent: Truck bed tents are a good option for camping and outdoor adventures.
• Cargo Net: Cargo nets are useful for securing loose items in the truck bed.
• Toolbox: Toolboxes provide secure storage for tools and equipment.

Section 7: Price Table for Truck Caps

Feature	New Truck Cap (Fiberglass)	Used Truck Cap (Fiberglass)	Tonneau Cover (Soft Roll-Up)	Tonneau Cover (Hard Folding)
Price Range	$2,000 - $4,000	$500 - $2,000	$200 - $500	$700 - $1,500
Installation Cost	$100 - $300	$0 (DIY) or $100 - $300	$0 (DIY) or $50 - $150	$0 (DIY) or $50 - $150
Pros	Secure, weatherproof, large storage	Cost-effective, readily available	Affordable, easy to install	More secure than soft covers
Cons	Expensive, bulky	Potential for damage, limited warranty	Less secure, limited storage	More expensive than soft covers
Compatibility Check	Essential before purchase	Essential before purchase	Model-specific	Model-specific
Notes	Price varies by brand, features	Inspect thoroughly for damage	Good for basic weather protection	Offers better security

Conclusion: Making the Right Decision

So, will a cap off a 2012 Sierra short box fit a 2013 short box? The likelihood is high, given the shared generation and similar bed dimensions. However, relying solely on this assumption is not recommended. A thorough inspection, careful test fit, and consideration of the factors outlined in this guide are essential. By taking the time to verify compatibility, you can ensure a proper fit, avoid potential problems, and enjoy the benefits of a truck cap for years to come. Remember, when in doubt, consult with a professional truck accessory specialist.

Frequently Asked Questions (FAQ)

Q: What if the cap is slightly too long?

A: A slight overhang at the rear of the truck bed is generally preferable to a cap that is too short. You may be able to adjust the cap's position slightly to minimize the overhang. However, if the overhang is excessive, it could interfere with the tailgate or create an unsightly appearance.

Q: Can I modify a cap to fit a different truck bed?

A: While it's possible to modify a truck cap, it's generally not recommended. Modifications can be complex and expensive, and they may compromise the cap's structural integrity and weather resistance.

Q: Where can I find used truck caps for sale?

A: You can find used truck caps for sale on online marketplaces like Craigslist, Facebook Marketplace, and eBay. You can also check with local truck accessory shops and salvage yards.

Q: What should I look for when inspecting a used truck cap?

A: Inspect the cap for any signs of damage, such as cracks, dents, or rust. Check the seals and hardware for wear and tear. Ensure the windows and doors open and close smoothly. If the cap has interior lighting or remote locking mechanisms, test them to make sure they are working properly.

Q: Is it worth buying a new truck cap instead of a used one?

A: If you want a guaranteed fit and a warranty, buying a new truck cap is the best option. However, if you're on a tight budget and are willing to take the time to find a compatible used cap, it can be a good alternative.