1998 Chevy Silverado Z71 1500 pick up truck 4X4, repair 140,000 miles engine

1998 Chevrolet Silverado 1500 Description

1998 Chevy Silverado Z71 1500 pick up truck 4X4
Truck has issues:Doesn't start (fuel pump???)transmission: no reverse, two forward gears only
radiator - leaks
not working: A/C
inside door handle broken
dents and peeling paintpossible water in oil ??
Truck has potential:new battery
comfortable front bucket seats, w/ armrests*
low mileage, 140,501
good engine
good tires (one wheel missing center wheel cap)
3rd door to back seat that folds up for cargo space in cab
heavy-duty trailer hitch
*Power driver's seat: raise the seat, lower seat, move forward, move back. Can also raise and lower the front and rear of the seat, tilt seat forward or tilt back. Also has Power Lumbar control to increase or decrease lumbar control on both the driver's and passenger's seats.
Automatic transmission with 4 wheel drive option.Cruise controlCD and Cassette tape drives with cd and tape storage compartments and AM/FM radioFront Tow hooksPower windows, door locks, and mirror adjustmentSpare tire and tire changing toolsOwner's manual
History since 2011:
I acquired this truck in 2011. A/C was the only thing not working at that time. Within a couple of years, the radiator sprung several leaks, which we fixed with a radiator leak sealer. A couple of years later, in 2015, my wife took the truck to the car wash to get it cleaned. After she returned, she couldn't back out of the parking lot. And she had only two forward gears.
So, with the problem of no reverse / only two forward gears, I stopped driving the truck, except to go to the post office, occasionally, up the street and back. After this, I noticed a single radiator leak, which I tried, unsuccessfully, to fix with JB-Weld. The truck has been sitting and not driven for about the last year and a half. As a result, the battery died. Decided recently to sell the truck, so I bought a new battery. In the meantime, the fuel pump went out, from sitting.A couple of weeks ago, when I was washing the truck, in preparation for taking pictures, I checked the oil. I'm not sure, but the oil looked kind of "milky," like there could be water mixed in with the oil. I'm sure a mechanic would know if that's the case. The picture of the paint peeled and rust is a picture of the driver's side back panel by the back seat.
If I could afford it, I would get this truck fixed and back on the road. I loved driving this truck: it's a real smooth comfortable ride and has a great radio. I have repair records for this truck going all the way back to 2000.