Fluid · Rear Differential
Rear Differential
for 1966 GMC C1500 305 cu in (5.0L) GMC V6 · RWD
Fluid Type
SAE 80W-90 gear oil
Spec: API GL-5
Capacity
3.5qt
3.31 L
Drain & Refill
3.5 qt
3.31 L
Change Interval
30,000 mi
48,270 km
Notes
10-bolt rear axle typical. Add 0.5 qt if limited slip equipped
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.