hello, i have tahoe with 5.3 in it. the oil pressure switch is behind the intake minifold on top of block. its not fun getting to. hard to unplug the wire. the retaining clip is tough. 1 1\16 deep thin wall socket., a swivel socket and couple of extensions and you should get it. the service book says to take the manifold off (its a book). you can get to it. this r and r should fix the high and low readings of your gauge. i did even have a message center reading of low oil pressure and thats because of the gauge. never mind the stepper motors others talk about. the cheapest and quickest will be this fix. good luck
Last edited by tahoefamily; 12-20-2011 at 08:42 PM.