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When you change a water pump on 2003 trailblazer do you also have to change timing belt?
Wiki User
∙ 13y ago
No. One had absolutely nothing to do with the other. Leave the timing alone.
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Trail blazer with 4.2 L motor does not have timing belt. It have timing chain instead. This timing chain last over 150K miles.
Possible the belt is Accessory drive belt (not timming). Per some manual this belt must be inspected and replaced if necessary every 60000 miles.
Wiki User
∙ 13y ago
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