GMC Sonoma, GMT325 (USA / CAN)

Manual transmission fluid capacity & service interval

GMC Sonoma, GMT325 (USA / CAN) manual transmission fluid capacity is 2 liters. Service intervals include a check every 7500 miles. The data covers 4 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
Sonoma 4.3 (1996-1999)
  • Use: Normal
  • Capacity 2 liter
  • Check 7500 miles
  • Code: Borg Warner 5/1
Sonoma 4.3 (1996-1999)
  • Use: Normal
  • Capacity 2 liter
  • Check 7500 miles
  • Code: NV 3550 5/1
Sonoma 4.3 4WD (1996-1999)
  • Use: Normal
  • Capacity 2 liter
  • Check 7500 miles
  • Code: Borg Warner 5/1
Sonoma 4.3 4WD (1996-1999)
  • Use: Normal
  • Capacity 2 liter
  • Check 7500 miles
  • Code: NV 3550 5/1

Additional Notes

  • The GMC Sonoma GMT325 manual transmission fluid capacity is listed at 2 liters across all recorded configurations for the 4.3-liter engine spanning 1996-1999.
  • A 2-liter service fill capacity is a relatively modest figure for a manual transmission, consistent with compact and mid-size truck gearboxes of the era rather than heavier-duty units found in full-size platforms.
  • The 4WD variant of the 4.3-liter Sonoma shares the same 2-liter manual transmission fluid capacity as the two-wheel drive version, indicating no difference in transmission fluid volume between the two drivetrain configurations.
  • The specified fluid check interval for all listed configurations is 7,500 miles under normal use conditions, meaning routine driving without the elevated stress associated with severe-duty classifications.

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