Where is the cabin filter in a 1998 Chevrolet truck?
A 1998 Chevrolet truck (assuming a C/K series pickup) does not have a cabin air filter as standard equipment. Cabin air filters weren't common in vehicles of that era. To have one, it would have been added aftermarket. If you suspect one is present, it's likely located behind the glove box, but you might need to remove the glove box to find it.