Here's the quick run-down...
1999 GMC Yukon 73k miles 5.7L 4X4
Driving home today from shopping, the darn thing just quit on me...While
waiting on AAA for a tow, I did some troubleshooting. Checked all fuses
and found ECM-1 (20A) blown. This appears to control the Injectors and
the computer. I stuck in a fresh fuse, as soon as I got the key in the
"on" position, there she blows.
Does anyone have any ideas where to start??
Other information that may be revelant:
I just got back from 1100+ mile trip to Death Valley which included 40+
miles of back country off roading at speeds up to 50 mph but typically
Temperatures up to 90-110.
2 Severe dust storms... couldn't see 10 feet in front of the vehicle a
few times. total time in storms maybe 90 minutes max.