Contamination of extended life coolant on GMC G3500

Problem overview

Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.

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GMC G3500 vehicles with this problem

1 model year affected

1996 GMC G3500

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Submitted by Vehicle Owner · May 29, 2025

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Contamination of extended life coolant on GMC G3500

Problem overview

GMC G3500 vehicles with this problem

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