Any feedback appreciated.
2002 Blazer V6
Anyone seen anything like this?
Cars bucks, usually twice, intermittently at between 15 and 70 miles
highway driving. Gets worse with time. Never happens during city
Temperature gauge goes from max low to max high when problem occurs.
Tach, Electrical, and other instruments remain in normal range.
Engine does not miss in neutral when the problem starts. (2000 rpms)
Turn motor off for a few minutes, restart and things are ok for a
No codes sets in ECM.
Has been to three dealers and no one can find a problem.
Checked transmission fluid. (Level ok, Clear and no burning smell.)
Tuned up recently.
Transmission rebuilt under warranty by GM. Warranty now expired.
Assuming it is a transmission issue, is there any explanation for the
link between the temperature gauge and the bucking? Other than the
ground, is there some link via a sensor or electrical connection?
Could an improper install of a satellite radio system cause electrical
issues for other components? Is this worth looking at? Owner does
not recall having the problem before the installation of the satellite
Additional Information: Aftermarket automatic started had to be
removed several years ago. It was tripping MIL.