LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1990 >> Forward Control 7.4 N, Standard >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Cooling System Specifications >> Cooling System Specifications
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Cooling System Specifications

COOLING SYSTEM SPECIFICATIONS

Application Specification
Coolant Capacity
Astro & Safari
2.5L (1) 10 Qts. (9.4L)
4.3L (2) 13.5 Qts. (12.7L)
"C", "K", "R", "S", "T" & "V" Series
2.5L 11.5 Qts. (10.9L)
2.8L 10.5 Qts. (9.9L)
4.3L (3) 10.9 Qts. (10.3L)
5.0L (4) 18 Qts. (17L)
5.7L (4) 18 QTs. (17L)
6.2L 25 Qts. (23.7L)
7.4L (5) 25 Qts. (23.7L)
"G" & "P" Series
4.3L 10.9 QTs. (10.3L)
5.0L & 5.7L (4) 18 Qts. (17L)
6.2L 25 Qts. (23.7L)
7.4L (5) 25 QTs. (23.7L)
Lumina APV, Silhouette & Trans Sport
3.1L 13.4 QTs. (12.7L)
Pressure Cap 15 psi
Thermostat Temperature 188-206°F (87-97°C)
(1) Capacity with rear heater 13 Qts. (12.3L).
(2) Capacity with rear heater 16.5 Qts. (15.6L).
(3) "S" Series capacity is 13.5 Qts. (12.8L).
(4) Capacity without A/C 17.5 Qts. (16.6L).
(5) Capacity without A/C 23 Qts. (21.8L).