| Subject: | Information on Blue Colored Engine Coolant - Keywords 30K Adding Appearance Engine Flush Green Life Service Silicate |
| Models: | 2004 - 2006 Chevrolet Aveo |
| 2004 - 2006 Chevrolet Epica (Canada Only) |
| 2004 - 2006 Chevrolet Optra (Canada Only) |
| 2005 - 2006 Pontiac Wave (Canada Only) |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
The cooling system is filled with a blue colored coolant, which is conventional ethylene glycol.
Recommendation/Instructions:
The blue coolant should be treated in the same manner as any other non-Dexcool based coolant. Dexcool should not be mixed with conventional ethylene glycol coolants. When the cooling system needs to be topped off or flushed, use a 50/50 mixture of clean,
drinkable water (preferably distilled) and any conventional ethylene glycol coolant that conforms to GM Specification 1825M, such as p/n 12378560 (US - 1 gallon) or p/n 993089 (Canada - 4 liters). This coolant must be drained, flushed, and refilled every 30,000
miles (50,000 kilometers).
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
