I'm trying to place an order with Charlie Wheatley for one of his custom tunes, but he needs my gear ratio and I don't know it off the top of my head and I'm out to sea until next friday and can't check my glove box. The truck is an '03 ECSB Z71 and I'm not sure if it has 3.42 or 3.73 gears (I'd assume 3.73's) but was there a standard gear set offered with the Z71 package or that most Z71 trucks coming off the assembly line were loaded with? Any help would be most appreciated!

 

most z71s came with 3.73s, if im not mistaken 3.73s were standard with 4.10s as an option.

if you have your VIN # it can be found from that

 

My VIN is 2GCEK19T531194410

 

My Z71 came with 3.42 gear sets..

 

Well crap, that's a curveball I didn't need! lol Can anybody else shed some light on this subject?

 

You Have Gt4 Rpo 3.73 Gear Ratio..

 

Awesome, thank you so much!

 

NO PROBLEM BRO..... GOOD LUCK