2003 Blazer Overheating
10

Asked by Matt Jul 05, 2017 at 05:09 PM about the 2003 Chevrolet Blazer LS 4-Door 4WD

Question type: Maintenance & Repair

Blazer overheating recently replaced
radiator and thermostat code is saying O2
sensor not getting enough resistance.

3 Answers
10

Matt answered 7 years ago

It doesn't seem to be losing coolant but is still overheating.

1 people found this helpful.
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11,575

FJ4072 answered 7 years ago

Try wiggling the fan back and forth, should be no play. If play, bad waterpump. Our gauges are not accurate. Use a scanner and report back what the real temperature is.

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