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checkers355 -> 2002 chevy G1500 Express Van (7/3/2008 11:54:39 AM)
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My speedo on my express van starts to flutuate at highway speeds causing my transmission to downshift erracticly and abs light to come on. I have changed the speed sensor and abs module with no results. No fault codes showing during diagnostics test. Van run fines most of the day then starts acting up about 2 hrs into a trip. Any info on where I should start troubleshooting? Thanks for any help.
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