I have a p0410 code in the truck.
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1999 GMC Jimmy Question: How do you reset the check engine light? Or how do you reset the computer ?
code po410 is a secondary air inj code. possibly the ck valves are burn't out, this happens. remove the bell shaped ck valve on your smog rails and see if air flows both ways. it should not, repl as req. the go to auto zone and have the code cleared for free. if the valves are good seek a further diag