more than likely 3.73 unless ordered different. do a search for rpo codes and then you can check your glove box for the codes.

 

thanks for the info fellas. Im goin to go get my NGK's today. I also have a can of sea foam at the house as well, so ill try that too. I didnt even think about that. You guys got any other good ideas for picking up some more power? headers, cai, tb spacer, stuff like that. I know the biggest gains will be from a tune, but what else should i check into before a tune? THanks again for the info, and help.

 

I don't think you've mentioned a fuel filter but you might want to consider a new one.

 

yes you can use TR55's on LT1's i do and with red taylor wires.

i pretty much went and still going thru the same thing with my girlfriends 1999 truck.

seafoam, air filter, get the tires checked, shocks...etc mostly anything that can be replaced.

 

i got tha tr-55's new filter, air, and fuel, pcv valve, gotta get my wires now..and the seafoam as well.