Rough idle &I reduced engine power & stabiltrak off & traction control off

Asked by Mar 04, 2017 at 02:14 AM about the 2008 GMC Sierra 1500 SLE1 Ext. Cab

Question type: Maintenance & Repair

After replacing the 6point connector and
about 5 inches of wire to the throttle
position sensor because the truck would
go into limp mode all the time and not to
mention I've also replaced the accelerator
pedal assembly and sensor. And when we
did all of this the battery cables were off
and left off all night and the next morning
when  started up the truck jerked into
reverse really hard and idled really bad and
now I seem to have a problem with my
whole left side not firing at all and I'm
scared we may have cost myself a lot more
then I bargained for because I bought used
with 150,000+ miles and it's nearly 9 years
old 2(008) it is now 2017 but anyway if
anyone can please enlighten me on what I
have go to do to have my truck running
again

1 Answer

107,745

Anything after 05 if the battery is disconnected without using the preset saver tool the computers loose the factory presets, and the only place to get them back is the dealership, it runs a hundred bucks where I'm at. Then after the system is brought back to operational mode then the entire system will have to be checked for any malfunction sensors and or wiring problems, as you stated that the whole left bank is inoperative, hopefully it isn't a totally corrupted ECM.

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