I have a 2001 Jimmy SLE with 46,400 miles.
Today while getting on the highway with four people weighing in at 550 lbs
and 75 lbs of additional load I accelerated from about 35 to 70 and the
service engine soon light came on and flashed on an off for about one minute
and then went back out.
This happened a second time today under exactly the same circumstances and
The truck ran fine with no noticeable loss of performance, pinging, or
I continued to then drive 80 miles with no additional complications
I have never had the light come on before except when starting and all the
lights come on as and then go out.
Does anyone have an idea what this is all about.