Gm used a short piston skirt on this year. The knock is piston slap that normally goes away when engine warms up. Sounds bad, but should not cause any problems.
You will get error code P0016. And you will hear engine knock.
To change the knock sensor on a 2005 Chevy Trailblazer, first disconnect the battery to ensure safety. Then, remove the intake manifold or any components obstructing access to the knock sensor, which is typically located on the engine block. Unscrew the old sensor, replace it with a new one, and reconnect the wiring harness. Finally, reassemble any parts you removed and reconnect the battery.
Ford makes no 4.3. Please revise. Is this a Ford 4.0 or a Chevy 4.3?
And engine knock is normally caused but I worn crankshaft bearing or rod bearing.
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.
Need to know what engine it has.
The engine sound from a Chevrolet Trailblazer can be attributed to several factors, including normal operation noises from the engine and exhaust systems. Common causes include engine knock, exhaust leaks, or issues with the timing chain or belt. Additionally, worn-out components like bearings or valves can contribute to unusual sounds. Regular maintenance and inspections can help identify and address these issues early.
if its a loud knock from the bottom end, DO NOT run the engine, it is likely a spun bearing; have a professional look at it
Severe spark knock (pinging) can damage the engine. Knock sensors detect spark knock (pinging) in the engine. They send that info to the ECM (Engine Control Module). The ECM makes temporary adjustments in engine timing to eliminate the spark knock.
The 1997 Chevy 1500 pickup truck 5.7 liter engine knock sensor can be found on the front of the engine. You will need to remove the front engine cover in order to access the sensor.
It is over by the starter, and screewed into the engine block.
light slapping knock is a piston knock a loud heavy repetitive knock is a connecting rod Very Bad