Hi Richard, I'm glad to assist you. Yes, but if you have an existing 5-inch suspension lift kit. It is designed for an existing 5-inch lift suspension. To prevent rear sag, the usual component to add is an Airbag (also called an Air Spring). The part number matching the 2003 Chevy Tahoe is F364108. Grab our sale price and click the link below to buy it today. Happy shopping! https://www.carparts.com/details/Chevrolet/Tahoe/Firestone/Air_Spring/2003/LT/8_Cyl_5-dot-3L/F364108.html?can=cpje1043_CSQA_20250309

Hi Jon, thank you for reaching out. This product fits applicable vehicles with 5-inch lift. If your vehicle information matches this product, you can use this link to order the part and take advantage of our low price for this item: https://www.carparts.com/coil-springs/skyjacker/s97c50r?can=CPAP3648_CSQA_20240120 I hope this helps. Happy shopping.

Hi Don, Yes, this is appropriate for lifting your rear 5 inches from a stock height. Some people augment also the rear with helper springs(or an air spring/air bag suspension, this is another option)) to carry additional heavy load without the worry of sagging the rear portion of your truck. For more additional details and reference you can actually contact Skyjacker directly for any technical queries you need to clarify(please call their number-1-866-820-2119). Also check the link below for the product details. https://skyjacker.com/shop/coil-springs/c50r/ (click application notes)