I used the little one with the green o-ring to fix my 2001 Silverado low pressure valve. The picture says the size fits R-22 but it fits my R-134a system.
Lichamp Automotive R1234YF Installer Standard
9 Review
Robust Robinair (RG3) Portable Refrigerant Recovery Machine, 115V, 60Hz -Efficiently Recovers Liquid and Vapor Refrigerant
9 Review
π¬οΈ UView Airlift Cooling Checker 550000
9 Review
π UView 560000 Combustion Leak Tester: A Reliable Tool for Efficient Diagnosis
9 Review