Check with Auto Zone for a Slime compressor. There are several levels of pumps and they are not expensive. I have three different units and they have all worked well over the many years I've used them. IMHO
2013 Silverado 2500 HD Duramax/Allison Tuned
Aviator Wright Flyer #1919
"First In, Last Out". 11B4Y
DAV, MOPH, VFW, 5/7 Cav,1/8 Cav Assoc.
11th ABN Pathfinder Co. N7MIP