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Is a GMC Double Cab the same as a crew cab?

No. A GMC Double Cab is not the same as a Crew Cab; the terms describe different cab configurations and the exact dimensions vary by model year and market.


In GMC's lineup, the "Crew Cab" name is the standard descriptor for a four-door cab with generous rear-seat space, while "Double Cab" is a legacy or regional label that may refer to an older or smaller four-door setup depending on the generation. The practical differences can affect interior room, door-access, and overall vehicle length.


Understanding the two cab configurations


Before comparing specific models, it helps to know the core distinctions that typically accompany these labels.



    These are the main factors buyers should consider when evaluating a GMC Double Cab versus a Crew Cab:


  • Door layout and access: Crew Cab usually features four full-size doors with easy access to rear seats; Double Cab configurations may have smaller or differently arranged rear doors depending on the year and model.

  • Rear-seat space: Crew Cab generally offers more rear legroom and a larger seating area for adults compared with a Double Cab configuration.

  • Interior footprint and practicality: A Crew Cab often provides more comfortable rear seating, headroom, and cargo convenience; a Double Cab might be a more compact option in some generations.

  • Vehicle length and bed options: The cab style can influence overall length and available bed lengths, with differences that vary by model year and trim.

  • Model-year and market variations: Not every GMC model offers both configurations in every market or generation; check the specific spec sheet for the year you’re considering.


In practice, the distinction is most noticeable in rear-seat space and door access. When shopping, always verify the exact doors, interior dimensions, and overall footprint from the dealer or the official spec sheet for the precise year and model you’re interested in.


How this plays out in GMC models


Sierra 1500


For the full-size Sierra 1500, Crew Cab is the most common four-door configuration with ample rear-seat space. Double Cab terminology is much less common on current trims and is typically associated with older generations or specific markets. Always confirm the exact cab style and interior measurements for the exact year you’re considering.


GMC Canyon


In the mid-size Canyon lineup, Crew Cab remains the more widely advertised four-door option on modern models, while any Double Cab labeling would likely refer to older generations or regional variations. If you’re evaluating a used Canyon, inspect the door count and rear-seat room to determine whether it meets your needs.


Used-market and regional notes


Across GMC’s history, Double Cab can appear in used listings or in international markets, sometimes reflecting a different door arrangement or interior space than the current Crew Cab standard. If you’re buying used or importing a vehicle, checking the specific door configuration and interior measurements is essential.


Practical guidance for buyers


Because cab labeling can vary by year and region, here are practical steps to avoid confusion when shopping GMC trucks.



  1. Check the door count and arrangement in photos or on the window sticker to confirm whether you’re looking at four full doors or a different setup.

  2. Compare rear-seat legroom and headroom measurements in inches, not just general descriptions.

  3. Verify bed length options and overall vehicle length to understand how the cab choice affects practicality for cargo or towing.

  4. Consult the official spec sheet for the exact model year and market; if in doubt, ask the dealer to confirm the cab configuration.


By focusing on these details, buyers can accurately determine whether a GMC Double Cab or Crew Cab better fits their needs, ensuring the right balance of passenger comfort and cargo capability.


Summary


In short, GMC Double Cab and Crew Cab are not interchangeable terms. Crew Cab is the more spacious, four-door configuration commonly used on GMC trucks today, while Double Cab is a legacy or regional designation that may indicate a smaller rear-seat footprint or an older generation. Always verify the door configuration and interior dimensions for the exact year and model you’re considering to avoid surprises.

Is a double cab the same as a crew cab?


No, a double cab and a crew cab are not the same; a crew cab offers more rear passenger space, legroom, and full-size rear doors, while a double cab has a more compact rear area with smaller rear doors and less legroom. The primary difference is the interior space for back-seat passengers, with a crew cab prioritizing comfort and a double cab potentially allowing for a longer bed.
 
Crew Cab

  • Rear-seat space: Offers significantly more legroom and shoulder room, making it more comfortable for adults or larger families. 
  • Doors: Has full-sized rear doors that open at a standard angle. 
  • Bed length: Often comes with a shorter bed to accommodate the larger cab, though other options may be available. 

Double Cab
  • Rear-seat space: Has less legroom and is more cramped for rear passengers compared to a crew cab. 
  • Doors: Features smaller rear doors that open at a tighter angle. 
  • Bed length: Can be paired with a longer bed because the overall cabin is shorter. 
  • Other names: Also referred to as an "extended cab" by some manufacturers. 



What is the difference between GMC Crew Cab and Double Cab?


The main difference between a GMC Double Cab and a Crew Cab is the size of the rear seat. Crew Cabs have significantly more rear legroom and a larger overall cabin space, making them better for families or carrying adults, while Double Cabs have a more compact rear seat but can still offer more cargo space (often with a longer bed option). Both have four doors, but the Crew Cab has larger rear doors and is generally the more spacious option. 
This video demonstrates the interior and exterior differences between a GMC double cab and crew cab: 59sAlexOnDrivesYouTube · Nov 22, 2021
Crew Cab

  • Rear passenger space: Most spacious with the most legroom and headroom, ideal for adults and larger families. 
  • Doors: Full-size rear doors for easier access. 
  • Bed options: Typically available with a standard or short bed. 

Double Cab
  • Rear passenger space: Less spacious than a Crew Cab, with a more compact rear seat. 
  • Doors: Smaller rear doors than a Crew Cab. 
  • Bed options: Often paired with the standard or long bed, which can provide more cargo room. 

Which one should you choose?
  • Choose the Crew Cab if: Your priority is maximum rear-seat comfort for frequent passengers or family use, as it provides much more room to work with. 
  • Choose the Double Cab if: You need four doors and a back seat, but want to prioritize bed length and cargo space, or if you want a slightly more compact truck overall. 



What is a GM double cab?


As you could probably guess, an Extended Cab pickup truck (can also be called a Double Cab pickup) is basically just a Regular Cab with more room behind the front seating. When it was first introduced, extended cab pickup trucks were just sold as 2-doors and had small jump seats in the back.



What is the difference between GMC truck cabs?


While both cabs have four doors, the Crew Cab offers more rear passenger space and dual bed options (Short and Standard), whereas the Double Cab features a slightly more compact design with just the Standard Box.


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Kevin Bennett

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Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.