Simply insert the tool into the injector retainer bracket bolt hole, attach a socket and ratchet/breaker bar to one of the hex ends and start rocking back and forth - the injector will pop right out.
40Pc Diesel Common Rail Injector Puller Set Remover Master Injection Tool Kit
Diesel Common Rail Injector Puller Set Remover Master Injection 40Pcs Tool Kit
Diesel Common Rail Injector Puller Set Remover Master Injection Tool Kit 40Pcs
for GM Duramax 6.6L Injector Puller + 7222 Injector Tube Remover Installer Kit
For GM 6.6 Diesel 6778&6779 Injector Puller+7222 Injector Tube Remover/Installer
6778&6779 Injector Puller+7222 Injector Tube Remover/Installer For GM 6.6 Diesel