When my ECM went out I thought it was fuel pump/filter related. Truth be told, both times my fuel pump and filter went out it was pretty much "worked then it didn't." When my ECM went bad it was a long torturous process. I mean performance and idle gradually became worse.
the ECM isn't cheap...
my first day in the group. so I am as new as a newbie can be.
3 mechanics and no codes? Without knowledge of how performance degraded or any other characteristics of your failure, and a lack of codes, My first guess is your mule's brains have fried. ECM's are easy to replace and they do fail...
2001 Denali. 248k+ miles. Original owner. Love this truck.
AWD tranny was acting up and replaced under original warranty.
Replaced fuel pump/filter a couple of times. Replaced water pump around 200k.
A/C has developed a persistent Freon leak the last few years. I just keep recharging it and...
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