VIN to find differential ratio
 

Can I user the VIN to find the differential ratio? We want to buy a travel trailer and the towing capacity is dependent on which rear end we have. As it is a used vehicle with no history, how can I find out?

Jim

Welcome to the forum..
I don't know if the VIN will provide it as easily as the RPO codes will...
you can find the RPO's in the glove box...
What year model are you looking for/at?

A by no means complete list, but a ball park in which to play;)

G80 : AXLE POSITRACTION, LIMITED SLIP
G81 : POSITRACTION REAR AXLE
G82 : AXLE REAR, 4.56 RATIO
G84 : AXLE REAR, 4.10 RATIO
G86 : AXLE, REAR, LIMITED-SLIP
G87 : RING GEAR, 8.50 INCH
G89 : RING GEAR, 7.50 INCH
G91 : SPECIAL HIGHWAY REAR AXLE RATIO 3.08
G92 : AXLE REAR RATIO, PERFORMANCE
G94 : AXLE REAR, 3.31 RATIO
G95 : AXLE REAR RATIO, ECONOMY
G96 : AXLE REAR, 3.55 RATIO
G97 : AXLE REAR, 2.73 RATIO
GH0 : AXLE REAR, 3.54 RATIO
GH2 : AXLE REAR, 2.29 RATIO
GH3 : AXLE REAR, 2.77 RATIO
GH4 : AXLE REAR, 2.92 RATIO
GK9 : AXLE REAR, 4.63 RATIO
GL3 : AXLE REAR, 6.17 RATIOG
GM1 : AXLE REAR, 2.59 RATIO
GM3 : AXLE REAR, 3.45 RATIO
GM8 : AXLE REAR, 2.56 RATIO
GMC : PLANT CODE PONTIAC, MI, USA
GN9 : AXLE REAR, 4.11 RATIO
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
GU4 : AXLE REAR, 3.08 RATIO
GU5 : AXLE REAR, 3.23 RATIO
GU6 : AXLE REAR, 3.42 RATIO
GV1 : AXLE REAR, 2.73 RATIO
GV2 : AXLE REAR, 5.83 RATIO
GV3 : AXLE REAR, 3.08 RATIO
GV4 : AXLE REAR, 3.36 RATIO
GV5 : AXLE REAR, 3.55 RATIO
GV7 : AXLE REAR, 4.11 RATIO
GV8 : AXLE REAR, 2.72 RATIO
GW2 : AXLE REAR, 2.56 RATIO
GW3 : AXLE REAR, 2.56 RATIO
GW4 : AXLE REAR, 3.31 RATIO
GW5 : AXLE REAR, 2.73 RATIO
GW5 : AXLE RATIO, 3.16 RATIO
GW6 : AXLE REAR, 3.27 RATIO
GW8 : AXLE REAR, 4.10 RATIO
GW9 : AXLE REAR, 2.93 RATIO (DUP WITH GU3)
GWL : SPRING, RR, 9000 LBS CAPACITY
GX1 : AXLE REAR, 3.70 RATIO
GX2 : AXLE REAR, 3.07 RATIO
GX3 : RATIO,TRANSAXLE FINAL DRIVE 3.33
GY2 : AXLE REAR, 3.31 RATIO
GYS : RATIO TRANSAXLE FINAL DRIVE 3.65
GZW : GVWR: 6459 LBS. / 2930 KGS
H01 : AXLE REAR, 3.07 RATIO
H04 : AXLE REAR, 4.11 RATIO, SINGLE SPEED
H05 : AXLE REAR, 3.73 RATIO
H12 : AXLE REAR, 21000 LBS, EATON 21065S, SINGLE SPEED
HA3 : AXLE REAR, 5.29 RATIO, SINGLE SPEED
HC4 : AXLE REAR, 4.56 RATIO
HC7 : AXLE REAR, 5.13 RATIO, 7500 LBS, SINGLE SPEED
HC8 : AXLE REAR, 3.21 RATIO, SINGLE SPEED, TRUCK
HE3 : AXLE REAR, 3.07 RATIO, 3500 LBS, SINGLE SPEED,
HF7 : AXLE REAR, 4.56 RATIO, 10000 LBS, DANA 70, SINGLE
HF8 : AXLE REAR, 4.88 RATIO
HK1 : AXLE REAR, 2.87 RATIO
HK9 : AXLE REAR, 5.86 RATIO 10000 LBS, SINGLE SPEED

front and rear axle ratios
 

in regard to my 99 suburban K1500 w/AT I have a question: is the rear axle ratio the same as the front axle ratio? I don't know why it would not be, but just checkin'....
Thanks.

front and rears should be the same or it will tear something apart.

rpo list for 1995 2500 4x4? want to know gear ratio and which transmission I have.

rear axle ratio for a 2007 Chevy Suburban K1500

would you know axle ratio for 2007 Chevy Suburban K1500?

Gear ratio
 

I have a 2000 Chevy Blazer 4.3L 4×4 and I need to find out my rear end gear ratio so I can replace the rear axle bearings. I do not have a RPO code in my glove box that I can find. How else can I find out what it is?

This site will decode the VIN:
https://chevroletforum.com/forum/vindecoder.php

I don't know if the axle code is something that will be included or not, though.