2002 Suburban 2500 / 4x4 / 8.1L 84k miles Suburban dash gauges all die at once, then come back on, with entire dash lighting up (like when you first start vehicle), then goes back to normal. It did this two days ago at low speed (25 mph) on smooth road. Then I drive for 50 miles with no problems. Did it again yesterday on smooth road but at 45 mph, but then engine revs, and it appears transmission is stuck in second (drive selector is in “D.”) May have done they tranny downshift two days ago when dash gauges died, but I just didn't notice it since that was at low speed? Drove today with no problems. Advice/comments so far from others include: 1) Bad ignition switch. Power to the IP goes through it, that's why the intermittent failure. The PCM power also goes through the switch, thats why the trans gets stuck in 2nd or 3rd gear...the failsafe mode. May or may not set any codes. 2002 was good for that. and 2) Or possibly a loose connection at cluster or anywhere from its feed or ground. Agreed response 1 above is more than likly right on the money. Hard to solve when you can't duplicate at mechanic's shop. Any ideas?? Thanks!!