I have a 97 Chevy k1500 5.7. It ran fine until I put a new fuel pump in, and since then I’ve had 10 codes. I replaced the crankshaft position sensor, and 1 O2 sensor, and cleared the ecu, now I’m getting a camshaft position sensor, and another 02 sensor code?

The previous 5 codes were:
No reading from downstream 02 Bank 2
Crankshaft position sensor 1
Cylinder 5 misfire
And engine misfire?

The current 5 are:
Low voltage from Bank 1 sensor 1
Low voltage from bank 1 sensor 2
Camshaft position sensor
Cylinder 5 misfire
Mass airflow sensor

Pretty regular daily driving, and good maintenance. I’ve had the truck since I was 12 (As a farm truck), and have never had a problem with it till now.