Defective blower motor switch, or defective blower motor resistor pack.
Replace the high speed relay.
That year did not have a CAM SENSOR.
The oxygen sensor on a 98 Chevy K1500 truck is located in the exhaust manifolds. It monitors oxygen levels in the exhaust gases and allows the computer to make adjustments for optimal performance.
How is the easiest way to change a fuel pump on my k1500 Chevy pickup
In the truck!
The blower resistor on a 1999 Chevy truck Z1500 is located behind the glove compartment. There is also a resistor on the firewall next to the blower motor itself.
A Gm 700R
16 inch rims
The 1999 K1500 had the 4L60E automatic trans. Not sure which standard trans was used.
5Qts. with a new filter.
That would be the 4L60E transmission.