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International Automotive Technicians Network
Re: Dual thermostats. Purpose and diagnostics
Posted to Technical Theory Forum on 7/7/2025

Those nasty Suburbans, they never got a chance to have head gasket issues, 120k a year at minimum usually meant 2 engines a year.

When I started there in 1990, they still had over 200 full size Buick sedans with.... 5.7 diesels. Injection pumps every couple ... Login to read more.