Appears that your "Nut Kit" has taken its toll. The fuel feed on that bank has been feeding into the plenum and not out to the injectors due to a break in the line. You will need to replace the Kit, both sides since you will have it open at this time. Check the fuel regulator as long as your in there and if need be replace as well. This is some what a common problem with this fuel delivery system.
Number one is the front cylinder on the driver side.
last cylinder on the passenger side
The most forward cylinder on the driver's side.
Cylinder number one is the front driver side. Number two is the front passenger side.
firing order 1,6,5,4,3,2 cylinder number, the left side front of vehicle to rear 1,3,5, right side front to rear 2,4,6,
Drivers side front
Most likely it has a 4L60E
I have a 95 blazer with a v6 vortec and there are 2 sensor on mine. 1 before the catalitic converter and 1 after it. Both are the same part number. They are easy to replace yourself but anywhere from $46.00 to $79.00 depinding on where you get them from. Good luck.
That would be the 1st spark plug up front in the passenger side head.
That would be the 4L60E transmission.
That would be the 3ed spark plug from the front on the drivers side head.
165432 is firing order I believe the #1 is the lower right if you looking from front of truck