I have a 1995 6.5l 3500 GMC the problem is it cuts out at steady throttle around 55 mph doest stop running just bucks coughs then goes on. Problem is intermittent. A check of the computer shows the boost sensor bad but really dont think it sould cause the problem

 

Thats the map sensor, it tells the ecm whether to fuel or defuel. Than can def be the problem.

 

aside from the map sensor check your lift pump and ops
my truck i would keep the throttle and it would do the same thing. put a new ops in and it stopped

 

Thanks for help will give those a try will let yall know

 

What is the code you are getting gave little more info are you getting black

Check the OPS and LP just like ebarresi5894 said