3.42
The codes GU6 and G80 are for the gear ratio on your vehicle the G80 code indicates your vehicle was eqipped from the factory with a locking rear differential and the GU6 code indicates your gear ratio.
GU6 Axle ratio is 3.42 according to the RPO code
3.42 gear ratio if it's a Z28. not true if you have a 6 speed manual you have 3.42s if you have an auto you eiter have 2.73s or 3.23s you can ckeck for the rpo code GU2=2.73 GU5=3.23 GU6=3.42 if your v6 you have 3.08s GU4
GU6 is just in indicator of the differential ratio a gu6 is a 3.42:1 ratio. it could be single track, limited slip or gov lock. if it is gov lock you should also have a g80 code in your glove box. if so and you tow or have tall tires be ready to replace when master pin breaks
95 chevy tahoe (K5 Blazer) comes stock with Gu6 "3.42 gear ratio" limited slip. It was also sold with an option for a Gu4/ G80 "3.73 gear ratio" posi-trac. In the glove box of the vehicle glued to the bottom interior surface is a list of mfg inc options for the vehicle. including the RPO codes for the drive train.
If you have the code GU6 on your glovebox sticker then you have 3.42 to 1. This was a pretty typical ratio for this year make and model. If you have GTU on the sticker then you have 3.73 to 1.
Dunsfold Aerodrome‎, Alfold, Surrey GU6, UK
Depends on each individual truck. Look in your glovebox....there is a label from the factory with parts codes on it. The one with G refers to your gear ratio/ ring & pinion. GQ1 -- AXLE REAR, STD RATIO GT4 -- AXLE REAR, 3.73 RATIO GT5 -- AXLE REAR, 4.10 RATIO GU4 -- AXLE REAR, 3.08 RATIO GU5 -- AXLE REAR, 3.23 RATIO GU6 -- AXLE REAR, 3.42 RATIO G80 -- AXLE REAR, LIMITED SLIP (POSITRACTION)
check option label in glove box for g codes gu6 = 342 gt4 =373 gt5 =411 etc or call dealer with vin
Check in your glove box for the code... 2.73=gu2 3.08=gu4 3.42=gu6 3.73=gt4,gq1 4.10=gt4 G80=posi trac
the 3.42:1 ratio was standard for that year if you look in the glovebox there is a white sticker with a list of codes you are looking for in the G section GU6 for 342 or GT4 for 3.73:1.. Also G80 is the code for locking differential.