Hi Ronald, thank you for reaching out. We don't have the exact measurement of the gas chamber for this item. However, this item has a travel damper of 2.01 inches. The extended length of this item is 8.86 inches, and the compressed length of 6.85 inches. Kindly call our parts team at 1-866-529-0412 and provide the complete vehicle information. We'll be more than glad to help you look for the correct part. Have a nice day.

Hello Shayne, This part replaces the tailgate lift supports also called the dropgate for GMC Jimmy and Chevy Blazer Does NOT replace the liftgate glass lift support. To check the fitment please use our Vehicle Selector — which can be found towards the top of the homepage as well as all category, search results, and product pages — can help verify if a part will fit your specific application. To enter your application, simply select your vehicle’s year, make, model, sub-model, and engine type and click “Go.” Once your application is selected, you’ll see a “Guaranteed to Fit” badge if the part will fit, and we recommend that you also double-check Your Vehicle Fit Details as well as the Vehicle Fitment Information table on the product page.