Electrical power may be lost to the interior of the vehicle due to a blown 125 amp fuse located at the under hood fuse box. This fuse can blow if jumper cables are connected incorrectly. Replacing the blown fuse will commonly correct this problem.Google+
Car Problem Reports
GMC Envoy No Electrical Power to Interior of Vehicle
GMC Envoy Problem
Average Mileage: 125,962 mi (74,202 mi - 239,000 mi)
I can't get any power to roll down electr,ic windows,also no a/c,o
Or gauges rear doors wont open or tailgate
Visitor, 2004 GMC Envoy, 117,000 mi
No interior power, seats, locks, radio, windows, heater
Visitor, 2007 GMC Envoy, 101,157 mi
After jump starting another vehicle the Envoy lost the power to the inside lights, radio and windows. We also heard a knocking in the radio area. We have the Envoy in the shop to correct the issue.
Visitor, 2006 GMC Envoy, 74,202 mi
No power on locks radio and interior lights .