HUMMER Keyless Entry Remotes are a very handy feature and help you enjoy your Hummer more. Hummer H2 and H3 transmitters can lock and unlock your truck door locks and even allow you to click a button on your key fob to start the engine. GM transmitters are now standard equipment on all H2 and H3 trucks. Replacement fobs and transponder car keys make your life easier, protecting you from auto theft and carjacking.