Discussion in 'Engine & Drivetrain' started by Nitrostick, Jul 9, 2018.
Yes, GU6= 3.42
FWIW on the '02 generation 3.42 is GU6 and the 3.73 is GT4.
I have the 3.42 and I cannot maintain speed up even relatively steep hills in 3 mode. It will kick down to 2nd and I hate that. Towing 3000# car on aluminum open trailer.
Definately go with the 3:42's which are option code GU6, GU4 would be 3:08. On an LS, LT, LTZ the standard is 3:08 and you have to get the Heavy Duty Trailer Pkg w/ the JL1 controller to get the 3:42's, it all comes in that package. Z71's ALL have the 3:42 standard but you can NOT get the Heavy Duty Trailer Pkg which makes no sense in my opinion lol.
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