2002 Chevrolet Tahoe electrical system problems

I am a paramedic in st. Charles county missouri, a suburb of st. Louis. In the months of november and december 2002 I responded to three crashes involving full size GM trucks. All the vehicles caught fire in the left side of the engine compartment after a moderate to high speed impact. The vehicles were involved in driver side off set impacts that lead to intrusion into the engine compartment. The vehicles were a 2002 4x4 avalanche, 2001 ext. Cab 4x4 silverado, and a 2002 4x4 tahoe.

This vehicle was leaking oil from the engine, front and back brakes were faulty, the starter was going bad, the electrical system for the back windows were not in working condition. The vehicle would display sensor lights to have the vehicle engine checked but then after about 2 days it would not show a displaying message it would also effect the audio fuse that allows the audio system to function. The tires were bald on the front driver side and left back passenger side.