GMC Workshop Service and Repair Manuals

Fluid - Differential: Capacity Specifications

Light Duty Models

Locking..........................................................................................................................................................................................................................GL-5*
Others.....................................................................................................................................................................................................80W, 80W-90* GL-5
*For vehicles normally operated in Canada, 80W only
CAPACITY, Refill:                                          
Front:

K-10/15, -20/25 1988-92..................................................................................................................................................................1.7 Liters    3.6 Pints
K-30/35 1988-92..............................................................................................................................................................................2.1 Liters    4.6 Pints
V-10/15, -20/25 1988-89..................................................................................................................................................................1.9 Liters    4.0 Pints
V-30/35 1988-89..............................................................................................................................................................................2.8 Liters    6.0 Pints
V-10/15, -20/25 1990-91..................................................................................................................................................................1.7 Liters    3.6 Pints
V-30/35 1990-91..............................................................................................................................................................................2.1 Liters    4.6 Pints

Rear:

Chev. 8-1/2" ring gear......................................................................................................................................................................2.0 Liters    4.2 Pints
Chev. 9-1/2" ring gear......................................................................................................................................................................2.6 Liters    5.5 Pints
Dana 9-3/4" ring gear.......................................................................................................................................................................2.6 Liters    5.5 Pints
10-1/2" ring gear

Chev...........................................................................................................................................................................................3.4 Liters    7.2 Pints
Dana...........................................................................................................................................................................................2.6 Liters    5.5 Pints

Rockwell 12" ring gear....................................................................................................................................................................6.6 Liters   14.0 Pints

Heavy Duty Models

Conventional & Locking......................................................................................................................................................................80W, 80W-90* GL-5*
*For vehicles normally operated in Canada, 80W only
CAPACITY, Refill:                                          
Front:......................................................................................................................................................................................................2.1 Liters    4.6 Pints
Rear:

Chev. 8-1/2" ring gear......................................................................................................................................................................2.0 Liters    4.2 Pints
Chev. 9-1/2" ring gear......................................................................................................................................................................2.6 Liters    5.5 Pints
Dana 9-3/4" ring gear.......................................................................................................................................................................2.8 Liters    6.0 Pints
Dana 10-1/2" ring gear.....................................................................................................................................................................3.4 Liters    7.2 Pints
Rockwell 12" ring gear....................................................................................................................................................................6.6 Liters   14.0 Pints