MODEL IDENTIFICATION
Vehicle model can be identified by fifth character of Vehicle Identification Number (VIN), stamped on metal pad on top of left end of instrument panel, near windshield. See MODEL IDENTIFICATION table.
| Series (1) | Model |
|---|---|
| "C" | 2WD Pickup, Sierra, Silverado, Suburban, Tahoe & Yukon |
| "G" | (2) RWD Van |
| "K" | Escalade, 4WD Pickup, Sierra, Silverado, Suburban, Tahoe & Yukon |
| "L" | AWD Astro & Safari |
| "M" | 2WD Astro & Safari |
| "P" | Forward Control & Motorhome |
| "S" | 2WD Blazer, Jimmy, Pickup & Sonoma |
| "T" | Bravada, Envoy, 4WD Blazer, Jimmy, Pickup & Sonoma |
| (1) Fifth character of VIN. (2) Includes Express, G-Van and Savana. | |
| (1) | Fifth character of VIN. |
| (2) | Includes Express, G-Van and Savana. |
MODEL IDENTIFICATION
DESCRIPTION
This article covers 2 similar locking differentials: those with a 2-piece case (axles with a 10 1/2" ring gear) and those with a 1-piece case (all other axles). The 1-piece case has 2 pinion gears. The 2-piece case has 3-pinion gears. Both types have a clutch disc pack behind each of the side gears.
AXLE RATIO & IDENTIFICATION
Rear axle identification is stamped on forward side of right axle tube. The first 3 digits indicate rear axle ratio, the next digit indicates axle assembly build source code, the next 3 digits indicate the day built in Julian Date form and the last digit identifies the shift build (first or second).
Front axle identification is located on tag attached near axle tube.