Passenger side plug is a tap for a tach signal-don't worry about it.
Drivers side plugs...the round one with 1 wire is a knock sensor plug. The knock sensor should be on the block, near the starter. See if it plugged in. If it is, that plug is redundant(don't worry about it.) Although, if it wasn't plugged in, your service light would be on.
Can't think of what the square plug is for..possibly a/c?
The corroded wire looks like it is going to the coolant sensor. If your guage is reading OK, don't worry about it. Otherwise, get a new pigtail from GM.
Hope this helps.
Drivers side plugs...the round one with 1 wire is a knock sensor plug. The knock sensor should be on the block, near the starter. See if it plugged in. If it is, that plug is redundant(don't worry about it.) Although, if it wasn't plugged in, your service light would be on.
Can't think of what the square plug is for..possibly a/c?
The corroded wire looks like it is going to the coolant sensor. If your guage is reading OK, don't worry about it. Otherwise, get a new pigtail from GM.
Hope this helps.
