Dies under load?

2002 CHEVROLET BLAZER
193,000 MILES • 4.3L • 6 CYL • 4WD • AUTOMATIC
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LINNEY84
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I have replaced all sensors but the trans sensors my blazer has trouble starting and when i put it in gear to leave it dies this is my initial issue before changing sensors and its still happening i change fuel filter and pump as well
Jan 18, 2026 at 1:21 PM
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STRAILER
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Do you have any codes? If you have not checked this is what you need to do. Here is a video to help

https://www.youtube.com/watch?v=LBCpCWEFnTg

Let me know what you think about the video. To me it sounds like vacuum leak or the throttle body needs to be serviced. Here is a guide I would go over as well which covers the issue you are having.

https://www.2carpros.com/articles/stall-at-idle

Please go over these guides and get back to us. Please upload a short video in your response of the problem, so I can see what's going on

Jan 19, 2026 at 7:09 AM