Buick Grand National
Maintenance specs for 2 variants of the Buick Grand National — from 1985 to 1987.
1985–1985 Buick Grand National
3.8L V6 SFI (LC2) · RWD
200 hp / 300 lb-ft
Transmission
Type4-Speed Automatic (200-4R)
FluidDexron III
Drain & fill5 qt
Full capacity11 qt
Power Steering
TypeHydraulic
FluidGM Power Steering Fluid
Differentials
Rear fluid80W-90 GL-5
Fuel
Tank18.1 gal
TypePremium 91
Service Intervals
Oil change3,000 mi
Trans service30,000 mi
Coolant flush30,000 mi
Spark plugs30,000 mi
Timingchain (no scheduled replacement)
Air filter45,000 mi
Cabin filter22,500 mi
Drive belt45,000 mi
1986–1987 Buick Grand National
3.8L Turbo V6 (LC2 Turbo) · RWD
245 hp / 355 lb-ft
Transmission
Type4-Speed Automatic (200-4R)
FluidDexron III
Drain & fill5 qt
Full capacity11 qt
Power Steering
TypeHydraulic
FluidGM Power Steering Fluid
Differentials
Rear fluid80W-90 GL-5
Fuel
Tank18.1 gal
TypePremium 91
Service Intervals
Oil change3,000 mi
Trans service30,000 mi
Coolant flush30,000 mi
Spark plugs30,000 mi
Timingchain (no scheduled replacement)
Air filter45,000 mi
Cabin filter22,500 mi
Drive belt45,000 mi