Fluid · Coolant
Coolant
for 1999 GMC Suburban 7.4L V8 · 4WD
Fluid Type
DEX-COOL 50/50 orange
Spec: GM 6277M
Capacity
27qt
25.54 L
Drain & Refill
23 qt
21.76 L
Change Interval
150,000 mi
241,350 km
Data quality
Book-style estimate
Not yet expert-verified. Have the real number? Correct it below — takes 30 seconds.
Notes
Big block V8 cooling system. First change at 150k, then every 5 years/150k miles.
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.