Hummer H3 starting issue with new motor, consistently dies after 10-15 minutes despite extensive repairs on Hummer H3

Some Hummer H3 owners report experiencing persistent starting issues even after installing a new motor, with the vehicle consistently dying after running for 10-15 minutes despite extensive repairs. These issues may stem from a dead battery that fails to hold a charge, leading to starting difficulties. Additionally, a faulty starter can struggle to crank the engine effectively, resulting in intermittent starting problems. Some owners have noted that a bad ignition switch can cause the vehicle to stall or shut off unexpectedly, disrupting the necessary electrical connection to keep the engine running. A malfunctioning fuel pump may also lead to inconsistent fuel delivery, causing stalling or further starting issues. Moreover, problems with the security system can sometimes prevent the vehicle from starting or cause it to shut down after a short period. Given the extensive repairs already undertaken, it is advisable for owners to seek a professional diagnosis from a mechanic to identify any underlying issues causing these recurring problems.