After the catalytic converter (AKA downstream).
where is knock sensor on a 2001 sierra 5.3 2wd 1500.
The 2001 GMC Sierra-1500 has a V6 engine.
The 2001 GMC Sierra-1500 has 12 valves.
The 2001 GMC Sierra-1500 has overhead valves (OHV).
The 2001 GMC Sierra-1500 is a gas-powered vehicle.
The 2001 GMC Sierra-1500 has a 5-speed manual.
There is 2 of them on that engine and there both underneith the intake manifold. You will have to remove the intake to even see and get to them. No other way.
The 2001 GMC Sierra-1500 runs on regular unleaded.
The 2001 GMC Sierra-1500 is 16 ft. 11.2 in. (203.2 in.) long.
The height of the 2001 GMC Sierra-1500 is 5 ft. 11.2 in. (71.2 in.).
The 2001 GMC Sierra-1500's turning circle is 40.1 ft..
The rear track of the 2001 GMC Sierra-1500 is 5 ft. 6 in. (66 in.).