Two problems related to manifold/header/muffler/tail pipe have been reported for the 1998 GMC Jimmy. The most recently reported issues are listed below.
Ignition switch failed three times, causing vehicle to automatically shut off. Consumer states that engine soon light illuminates, driver?s window motor failed and window will not go up or down, all dash lights and gauges will stop working, muffler has hole in it and makes loud noise, muffler and pipe exhaust system replaced, and when crank sometimes backfires and shifts hard, servo making bang shift, installed servo and 2 synolids.
Last week truck lost all power and I could not get my key out of the ignition,once all power was back key came loose. I have had a problem with muffler since 1st month sounds like a hole in the exhaust and makes a loud ping sound ,dealer just told me I needed to replace muffler. When in reverse and backing out of driveway a loud clunk sound from front passenger side. Have lost power 2 times while driving down the street. Have also noticed that when I turn anything on in the car I am losing a significant amount of power . This includes blinkers,radio,a/c ,if they are all on my volts drop to almost 11.