so truck ran fine for a year or so then one day she acted like she was losing power. would not climb a hill at all.
i have tested the fuel all is good replaced the mass air flow sensor ,the crank shaft sensor still no start. has weak spark. had a mechanic look at it today and he felt the same way i did seemed to be the crank shaft sensor so i replaced it but still wont start tries but wont turn over

 

Welcome to the forum. You should ask your question in the Suburban section of the Forum. Are you getting any codes?