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Old 01-12-2007, 11:17 AM   #1
N2TRUX
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Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
05 Chevy- Speedo is jumpy

I have an 05 Chevy Silverado Ex-cab with a 5.3 auto and 3.73 (for reference). My service manager uses it as his daily driver so I haven't actually witnessed this happen.

He says that the speedo will jump up to 110+ mph and stay there a while then gradually settle back to normal. This has happened 2-3 times recently.

Anyone have this happen? I assume it's a speedo bad sensor, but I hate to change parts without a clue.

Anyone?
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