Other Fuel System Fuel Injection System problems of the 2001 Chevrolet 1500

In about 2006, the fuel guage in my husband's truck stopped functioning. It showed empty when tank was full. No recall notice was issued to us. When he had diagnosed, the diagnosis was a bad chip or electrical problem, or switch. It would be expensive to fix. At this time I was diagnosed with breast cancer & underwent surgery $ mos. Of chemo. My husband,military retiree, stayed with me in hospital. After my chemo, he had both hips replaced and was being treated until 2013 for spinal injections. In July 2013, he was diagnosed with stage 4 cancer & passed away in August. In the meantime, when he derove the truck he recorded mileage after a fill in order to keep track of amt. Of fuel. I always worried about this as being non-safe, but he could only get into a truck because of his medical condition, so our choices were limited. Now after his passing, the truck is in my name but I do not drive it because I am afraid for my safety because of the defect. I am still under the care of an oncologist and need the truck at this time. Are you able to help with this problem? it would relieve the stress & give me peace of mind regarding my safety. I await your response. I was referred to you by the NHTSA.