02 trailblazer engine goes to idle when running 65 mph or more this has only happened when pulling a trailer it will run fine when you pull over and let it sit for a second or so then it will do it ag?

It's probably fuel starved. check the fuel filter. i am having the same problem only now it happend when i was not towing. i changed my fuel filter and it still did it. i think it may be a fuel pump going bad. i did take it to a shop but they had no clue what they were doing and told me that my truck was fine. i told them to test the pump with a guage but i don't think they did it right.please let me know what you find. thanks. ssanga02@aol.com