this is gonna sound stupid....

[SapperRyash]

so i have always assumed i have a 5.3L 2001 Tahoe but im not actually sure if its a 4.8 or 5.3, im not a wrench turner or grease monkey so can you guys tell me how to make sure. i know it gets crappy gas mileage and thats about it!!! im trying to find out so i can start looking into more performance mods. thanks guys.

 

[JKmotorsports]

Under the hood you will have an emissions label that will state engine size, either 4.8L or 5.3L.

 

[SapperRyash]

Under the hood you will have an emissions label that will state engine size, either 4.8L or 5.3L.

where is this at?

 

[road1will]

I believe its on the air box.

 

[Godti]

Should be able to tell from your vin.
Vin Decoder, your Vin would have a V if its a 4.8L
http://www.lmctruck.com/icatalog/ce/full.asp?page=49

This is the thread I started looking for a VIN decoder, there is also a RPO decoder as well.
http://www.tahoeforum.com/showthread.php?t=5910

 

[SapperRyash]

I believe its on the air box.

didnt see it on the air box, will check the VIN tomorrow cuz i only have to work for like 2 hours. thanks guys!

 

[Oger]

It is usually eithe on the radiator cover, upper radiator support, or on the hood. I don't have mine to look where it is, but it will give info for the emmissions, year, spark gap, engine size and other stuff. probably a whit sticker about 6" by 3"

 

[Rollin Thunder]

you could only get the 4.8 if you had a trim level below an LS. just an FYI. so if you have an LT the 5.3 is standard.

 

[SapperRyash]

you could only get the 4.8 if you had a trim level below an LS. just an FYI. so if you have an LT the 5.3 is standard.

okay great, i figured i had a 5.3L due to the MPG im getting but i wasnt totally sure. thanks.