I have some Hadley Horns for years. I first put some on my '69 442 and those were vacuum powered. Antiques... I put those on '76 280Z, then '87 S-10 Blazer, then '91 911 Turbo. I upgraded to the newer electric pump on the 911 and then put them on my 2000 Tahoe. I ordered a new set for my 2013 Tahoe and over the years had a pretty good idea where to mount the horns, compressor and tank. The 2013 Tahoe has a perfect place for the compressor , tank , etc. The actual horns are behind the front bumper. This time I did mount a cutoff switch so I could just have the stock horns used because the truck is not supposed to pass inspection the loud horns ( lame law I know) , but I always have both the air horns and the stock horns turned on at all times. I have included a short video to show the difference between Stock and the Air Horns , but believe me I never turn the Air's off. I have included a link for the Hadley Horns, I got the 'Bully Horn' set that included everything you would need
https://hadleyadvantage.com/products-and-solutions/products/horns/bully-horns-kits/
https://hadleyadvantage.com/products-and-solutions/products/horns/bully-horns-kits/
