What would make a 1997 GMC Jimmy stall when put in gear It will idle and start with fluid but won't start on its own But will run until you put in gear and hit the gas it dies?

A 1997 GMC Jimmy stalling when put into gear could be due to several issues, such as a faulty transmission mount or a vacuum leak affecting engine performance. It might also indicate problems with the fuel delivery system, such as a clogged fuel filter or failing fuel pump, preventing adequate fuel supply under load. Additionally, issues with the ignition system, like worn spark plugs or a malfunctioning sensor, could contribute to the stalling when the engine is under stress. It's advisable to perform a thorough diagnostic check to pinpoint the exact cause.