Engine oil
5.5 US qt (5.2 L) with an aluminum oil pan, or 6.0 US qt (5.7 L) with a plastic oil pan, with filter; identify the installed pan before filling (GM TechLink MY2025 chart)
Notes
Colorado Work Truck 2WD 2WT L3B MFC MY2025 US only. US MY2025 Colorado Work Truck 2WD, group 2WT (14C43); L3B, MFC and KL9 standard per native GM order-guide Mechanical column D; VIN series SB and engine K=L3B per GM VIN standard REV9 p.27. Quantity depends on the installed oil-pan material, which the order guide does not identify; identify the pan before filling. The Colorado owner's manual (printed p.343 / PDF p.344) prints only 5.7 L / 6.0 qt with filter, the chart's plastic-pan value, without naming the pan.
Coolant
11.0 L (11.6 US qt), approximately, for the entire cooling system
Notes
Colorado Work Truck 2WD 2WT L3B MFC MY2025 US only. US MY2025 Colorado Work Truck 2WD, group 2WT (14C43); L3B, MFC and KL9 standard per native GM order-guide Mechanical column D; VIN series SB and engine K=L3B per GM VIN standard REV9 p.27. No cross-make, cross-trim, cross-year or optional-equipment inference.
Transmission fluid
DEXRON-HP automatic transmission fluid
Notes
Colorado Work Truck 2WD 2WT L3B MFC MY2025 US only. US MY2025 Colorado Work Truck 2WD, group 2WT (14C43); L3B, MFC and KL9 standard per native GM order-guide Mechanical column D; VIN series SB and engine K=L3B per GM VIN standard REV9 p.27. No cross-make, cross-trim, cross-year or optional-equipment inference.
Fuel tank
81.4 L (21.5 US gal), approximately
Notes
Colorado Work Truck 2WD 2WT L3B MFC MY2025 US only. US MY2025 Colorado Work Truck 2WD, group 2WT (14C43); L3B, MFC and KL9 standard per native GM order-guide Mechanical column D; VIN series SB and engine K=L3B per GM VIN standard REV9 p.27. No cross-make, cross-trim, cross-year or optional-equipment inference.
CarFactBook