Ranger (GM) Ranger B (II)

Coolant capacity & service interval

The Ranger (GM) Ranger B (II) uses coolant with capacities ranging from 6.5 to 10 liters depending on the transmission type. The data covers 6 different configurations.

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

TypeSpecifications
2800 GTS (1974-1978)
  • Use: Normal
  • Capacity 10 liter (with automatic transmission)
  • Capacity 9,6 liter (Manual transmission)
1700 (1972-1978)
  • Use: Normal
  • Capacity 7,3 liter (with automatic transmission)
  • Capacity 6,5 liter (Manual transmission)
1700S (1972-1978)
  • Use: Normal
  • Capacity 7,3 liter (with automatic transmission)
  • Capacity 6,5 liter (Manual transmission)
1900 (1972-1978)
  • Use: Normal
  • Capacity 7,1 liter (with automatic transmission)
  • Capacity 7,2 liter (Manual transmission)
2500 (1972-1978)
  • Use: Normal
  • Capacity 10 liter (with automatic transmission)
  • Capacity 9,6 liter (Manual transmission)
2500 GTS (1972-1974)
  • Use: Normal
  • Capacity 10 liter (with automatic transmission)
  • Capacity 9,6 liter (Manual transmission)

Additional Notes

  • Across the GM Ranger B (II) lineup, cooling system capacity varies by engine displacement, with the 1700 and 1700S sharing identical figures, the 1900 sitting in a mid range, and the 2500 and 2800 GTS variants requiring the largest fills.
  • The 1700 and 1700S (1972-1978) both specify 7.3 liters with automatic transmission and 6.5 liters with manual transmission, meaning the automatic configuration adds 0.8 liters to the cooling system fill due to the transmission oil cooler typically routed through the radiator.
  • The 1900 (1972-1978) presents an unusual pattern where the manual transmission configuration holds slightly more coolant at 7.2 liters compared to 7.1 liters for the automatic, a reversal of the relationship seen in the smaller-displacement 1700 variants.
  • The 2500 (1972-1978) requires 10.0 liters with automatic transmission and 9.6 liters with manual transmission, reflecting the greater thermal load associated with the larger engine and the additional cooling circuit present in automatic-equipped vehicles.
  • The 2500 GTS (1972-1974) shares the same cooling system capacities as the standard 2500, at 10.0 liters automatic and 9.6 liters manual, indicating no additional cooling volume despite the GTS designation.
  • The 2800 GTS (1974-1978) also carries 10.0 liters with automatic and 9.6 liters with manual transmission, matching the 2500 and 2500 GTS figures despite the larger 2800 displacement engine.
  • All six configurations are specified under normal use conditions, meaning the listed capacities apply to standard operating environments rather than severe-duty or high-temperature service scenarios.
  • The capacity gap between the 1700-series and the 2500-series is approximately 2.7 liters on the automatic side, which reflects the substantially larger engine block and radiator volume required to manage heat from the bigger displacement unit.

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