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Posts Tagged: Silverado P0480

Silverado P0480

Diagnose and fix Silverado P0480 trouble code and overheating Shops are reporting multiple instances of a Silverado P0480 trouble code with an overheating condition. These trucks have two radiator fans and three relays. The three relays allow the fans to run at two speeds. So don’t get fooled into thinking that because the fans are running, they’re not the problem. They could be running on low speed and not pulling in enough air to cool. Here’s how GM 2-speed radiator fans work Low speed fan operation The PCM provides ground … Read More

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