September 15, 2025
In this Cadillac LF4 Engine Air Filter Change guide we will discuss how to replace them and what options we have.
Removing the Old Filters
The first thing you will do is loosen the air filter box hose clamps on each side of the air box lid. Once loose enough disconnect the air duct outlet and reposition it out of the way.
Un-plug the 2 mass airflow sensors from each side of the air filter box lid.
Remove all the retainer bolts from the air filter box. There are 13 of them and the one in the very center is easy to not see. If the air box lid doesn’t come apart easy make sure you removed all 13 bolts.
Remove the old filters and inspect the area for large debris or road grit. Look inside the bottom of the airbox and clean it before putting new air filters back in.
After everything is cleaned up secure all 13 lid fasteners and the outlet duct hose clamps and plug back in the 2 mass air flow sensors and you are complete.
LF4 Engine Air Filter Options
Paper (Single Use)
OEM GM Part# 84335354 Paper Filter Element
Amazon has an option with a few reviews that look promising. These are a paper stock like replacement for the 3.0 & 3.6 platforms. A-Premium is the brand. Cheap paper filters can be a great option if you are having issues with oiled filters causing check engine lights.
– A-Premium 2-PC Engine Air Filter Compatible with Cadillac CT4 LF4 Engine
Synthetic (Reusable)
K&N High-Flow Original Lifetime Engine Air Filter, these filters are washable and rechargeable. The manufacturer states an increase in power with use of these filters. Clean every 5 yrs or 75,000 is what they state.
Green Filter by Tapout Tuning is a set with cotton gauze layers tightly woven together with a steel mesh frame and support. These should be cleaned every 30,000 miles.
– Green Performance Air Filter 7490
