GM 3800 P1404 & P0404 error code saga
I’ve been wrestling with P0404 “Gas Cap” and P1404 EGR error codes on my 2001 3800-series-II GP-GT for at least a year. Replacing the EGR had no effect, nor did the frequently recommended reset procedures (disconnect EGR, clear code, immediately shut key off, then re-connect EGR). Turns out it was a bad vacuum hose to […]
