Hi, I've had my 99 silverado 5.3L ext cab for about a year now and i just hit 100k miles. What are some things that I should be looking at or replacing? plugs, o2 sensors, etc? I'm already getting a thermostat and k&N filter. Any thoughts are greatly appreciated

 

Fuel filter,plugs wires but i would pull a plug or two and look at them mine looked brand new so i left them.Clean the carbon off the trottle body blade and inlet,helps idle greatly.Injector cleaner.

 

Here's what Autozone says you should be doing. I started with 75k just catch up:

75000 miles or 120000 kilometers

Oil Filter, Engine
Engine Oil
Cabin Air Filter
Brakes and Traction Control Inspect
Fluid - Differential Inspect
Tires Rotate


82500 miles or 132000 kilometers

Oil Filter, Engine
Engine Oil
Brakes and Traction Control Inspect
Fluid - Differential Inspect
Tires Rotate


90000 miles or 144000 kilometers

Fuel Filter
Oil Filter, Engine
Engine Oil
Cabin Air Filter
Brakes and Traction Control Inspect
Fluid - Differential Inspect
Tires Rotate


97500 miles or 156000 kilometers

Oil Filter, Engine
Engine Oil
Brakes and Traction Control Inspect
Fluid - Differential Inspect
Tires Rotate


100000 miles or 160000 kilometers

Spark Plug
Fluid Filter - A/T
Fluid - A/T
Positive Crankcase Ventilation Valve Inspect
Ignition Cable Inspect