Carbon build up, Bad rod bearing,main bearings low oil pressure. sounds like you need an engine rebuild.
The knock sensor, in your 1997 Chevrolet Lumina, can be found on the front of the engine. The knock sensor is near the top of the engine.
You should check your motor mounts
The 1997 Chevrolet Cavalier motor will fit into the 1997 Pontiac sun fire. The motor mounts and the wiring harness are exactly the same.
it has 210 hp
Back of the engine block, underneath the coilpack.
The eight digit of the vin is the motor code
I had that problem and it was the wiper motor. I got one from the wreckers complete with the (transmission) or assembly and it works great. You can buy just the motor but it is more difficult to mount, I suggest changing the complete assembly.
Replacing the 1997 Chevrolet suburban blower motor resistor can correct your air output issue. The air output issue could because by other things.
The 1997 Cavalier has two motor mounts, as well as a transmission mount. If the mounts are broken the motor can move around and cause damage to components under the hood.
Remove the wiring harness from the wiper motor. Remove the wiper arm linkage. Remove the wiper motor retaining bolts. Reverse the process to install the new wiper motor.
Cold engine knock that goes away after warmup is usually piston slap. Worn pistons worn cylinder bores, wrong oil (too light) on a high mileage engine.
location of knock sensor in 1997 cheverolet Tahoe SUV 305 or 350 engine