The 2020 Chevy Colorado uses Dex-Cool long-life coolant, GM’s orange organic acid technology formulation.
For topping up or replacing, the factory fill is typically a 50/50 pre-diluted Dex-Cool. Use Dex-Cool or another GM-approved OAT coolant labeled as Dex-Cool-compatible, and avoid green or other silicate-containing coolants to prevent corrosion and deposits. If you switch brands or types, a complete system flush is strongly recommended.
Coolant options and how to use them
Below are compatible coolant options for the Colorado and guidance on how to use them properly.
- Dex-Cool Extended Life Coolant (orange) — usually sold pre-diluted in a 50/50 mix with distilled water, ready to pour into the reservoir.
- Dex-Cool Concentrate — you mix this with distilled water to achieve a 50/50 ratio, following the label's mixing instructions.
- GM-approved Dex-Cool-compatible OAT coolant from other brands — these are labeled as meeting GM Dex-Cool specifications and designed for GM engines.
Whichever option you choose, ensure the cooling system is flushed if you’re switching from a different coolant type, and fill to the proper level with the correct 50/50 mix. Do not top off with water alone if the system requires a specific Dex-Cool/OAT formulation, and follow the vehicle’s maintenance schedule.
Maintenance notes
Always use the same type of coolant that was specified for the system when servicing. If you’re unsure, have a professional service your coolant to prevent compatibility issues.
Summary
In short, the 2020 Chevy Colorado requires Dex-Cool orange long-life coolant. Use a 50/50 pre-diluted Dex-Cool, or Dex-Cool concentrate mixed per the label, or a GM-approved Dex-Cool-compatible OAT coolant. Avoid mixing with conventional green coolant, and follow the owner’s manual for maintenance and replacement intervals.