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kyle23 03-24-2009, 02:20 AM Ok Im looking to find out what gear ratio I have in my truck. I've heard that if your running down the freeway going 70 and if your rpm's are at 2200, 2300 then you got 4:10s. Well i was wondering if there was any other way to determine what gears you got. Thanks FastDonzi 03-24-2009, 07:13 AM The rpo codes in the glove box, I'll have to dig up a list of whats-what. brb FastDonzi 03-24-2009, 07:24 AM I don't know how many years this covers, but its a start... GQ1 : AXLE, STD RATIO GS1 : AXLE REAR, 2.73 RATIO GS3 : AXLE REAR, 3.73 RATIO GS4 : AXLE REAR, 3.70 RATIO GS5 : AXLE REAR, 4.11 RATIO GS6 : AXLE REAR, 4.56 RATIO GT1 : AXLE REAR, 2.56 RATIO GT2 : AXLE REAR, 2.29 RATIO GT4 : AXLE REAR, 3.73 RATIO (DUP WITH 5 X 1) GT5 : AXLE REAR, 4.10 RATIO (DUP WITH GT8) GT7 : AXLE REAR, 3.33 RATIO GT8 : AXLE REAR, 4.10 RATIO (DUP WITH GT5) GTY : AXLE, WIDE TRACK GU1 : AXLE REAR, 2.41 RATIO GU2 : AXLE REAR, 2.73 RATIO CHEVYHD496 03-25-2009, 12:40 AM check the axle housing. or jus take your VIN to chevy an get a printout. kyle23 03-25-2009, 06:19 PM Thank you very much geuss i got the 3.73 | ||