I have a 96 Chev. dually with a 454 in it. It runs great but the check
engine light comes on all the time. The truck sometimes, after having
been driven will not start(just turns over). After a while 5 minutes
to an hour starts right up. It does not do this everytime, though. It
has 94K on it and is all stock. I have replaced the gas cap, but to no
The codes say the left and right bank are running to rich. I have
taken to the Chev store and been given the run around,"they say we
will replace this, that etc.......... Cost$$$$$$$$$$$$$$$, we think
we can fix it though."
It usually happens when the gas tank shows 1/2 a tank.
Any suggestions would be appreciated.