DEEAGLE Air Bags Suspension Kit Compatible Vehicles 2007-2012 GMC Sierra 1500, 2012 GMC Sierra 1500, 2013 GMC Sierra 1500, 2014 GMC Sierra 1500, 2015 GMC Sierra 1500, 2016 GMC Sierra 1500, 2017 GMC Sierra 1500, 2018 GMC Sierra 1500;(Does not fit 07 Classic); 2007-2012 Chevrolet Silverado 1500, 2013 Chevrolet Silverado 1500, 2014 Chevrolet Silverado 1500, 2015 Chevrolet Silverado 1500, 2016 Chevrolet Silverado 1500, 2017 Chevrolet Silverado 1500, 2018 Chevrolet Silverado 1500(Does not fit 07 Classic) Load-leveling capacity Up to 5,000 lbs Installation Position Rear Minimum Pressure 5 PSI Maximum Pressure 100 PSI Drill Required Yes Lowered Vehicles No Do they require any special tools for installation? This air helper bags equires drilling, making the installation process straightforward and easy. How much psi can you put in the bags? 100 psi maximum pressure How can l reach to DEEAGLE ? You can click the "DEEAGLE" on product page, then click the "Ask a questions" buttom and you can reach to us. What I should pay attention to when using airbags? Regularly check for leaks and air pressure; avoid exceeding the load capacity; monitor for signs of wear or damage to the air bags. If You Don't Know DEEAGLE，You Know Squat.