GMC Sonoma
Maintenance specs for 4 variants of the GMC Sonoma — from 1991 to 2004.
1991–1993 GMC Sonoma
2.5L I4 (LN8) · RWD
105 hp / 135 lb-ft
Transmission
Type5-Speed Manual
FluidGL-4 75W-90
Drain & fill2.2 qt
Full capacity2.2 qt
Power Steering
TypeHydraulic
FluidDexron III ATF
Differentials
Rear fluid80W-90 GL-5
Fuel
Tank20 gal
TypeRegular 87
Service Intervals
Oil change5,000 mi
Trans service50,000 mi
Coolant flush30,000 mi
Spark plugs30,000 mi
Timingchain (no scheduled replacement)
Air filter45,000 mi
Drive belt100,000 mi
1991–2004 GMC Sonoma
4.3L V6 Vortec (L35/LF6) · RWD
190 hp / 250 lb-ft
Transmission
Type4-Speed Automatic (4L60-E)
FluidDexron III
Drain & fill5 qt
Full capacity11.2 qt
Power Steering
TypeHydraulic
FluidGM Power Steering Fluid
Differentials
Rear fluid80W-90 GL-5
Fuel
Tank20 gal
TypeRegular 87
Service Intervals
Oil change5,000 mi
Trans service50,000 mi
Coolant flush150,000 mi
Spark plugs100,000 mi
Timingchain (no scheduled replacement)
Air filter45,000 mi
Drive belt100,000 mi
1991–2004 GMC Sonoma
4.3L V6 Vortec (L35/LF6) · 4WD
190 hp / 250 lb-ft
Transmission
Type4-Speed Automatic (4L60-E)
FluidDexron III
Drain & fill5 qt
Full capacity11.2 qt
Power Steering
TypeHydraulic
FluidGM Power Steering Fluid
Differentials
Front fluid80W-90 GL-5
Rear fluid80W-90 GL-5
Transfer Case
FluidAuto-Trak II
Fuel
Tank20 gal
TypeRegular 87
Service Intervals
Oil change5,000 mi
Trans service50,000 mi
Coolant flush150,000 mi
Spark plugs100,000 mi
Timingchain (no scheduled replacement)
Air filter45,000 mi
Drive belt100,000 mi
1994–2004 GMC Sonoma
2.2L I4 (LN2) · RWD
120 hp / 140 lb-ft
Transmission
Type5-Speed Manual (NV1500)
FluidGL-4 75W-90
Drain & fill2.2 qt
Full capacity2.2 qt
Power Steering
TypeHydraulic
FluidGM Power Steering Fluid
Differentials
Rear fluid80W-90 GL-5
Fuel
Tank20 gal
TypeRegular 87
Service Intervals
Oil change5,000 mi
Trans service50,000 mi
Coolant flush150,000 mi
Spark plugs60,000 mi
Timingchain (no scheduled replacement)
Air filter45,000 mi
Drive belt100,000 mi