Bad plug wires, bad spark plugs.
yes it will fit they are an exacty exchange anything from the new body style 1988 to 1998
No it does not SORRY
3.73
NP246
4L60E in 5.0 or 305 cu in 4x4
The 1998 K2500 Suburban has a 44 gallon gas tank.
There is one injector which gives you a total of 8.
the fuel pump is in the gas tank
4L60 is the most common automatic transmission in GMC trucks
If it is a k1500, most likely it has the 4L60E transmission.
There is a chime module but if it is disconnected may also affect the interior lights.
Drop the gas tank and take the old one out and put a new one in.