Hi I have a 2005 Chevy avalanche 1500 zr1 (non body clad) model.

If I am driving and I hit a decent bump or something in the road...or am on a dirt road and have a little bit of truck shifting into a turn my truck (all of these within a matter of 4 seconds) immedietly
Unlocks then Locks
Engine light turns On then off
loss of rpm/loss of response from the pedal

sometimes the speedometer will jump quickly 10 mph or so....sometimes it stays up at that thresh hold.....some times it will jump so much that today it jumped to almost 70 mph when I was going 10-20ish....then when I sped up to like 50 ish it jumped to where it was straight down....

then it all goes back to normal/ or it will resume normal driving until the next decent bump

I don't know if it is connected with this issue but the traction control will turn on sometimes when I start from 0 mph (no dirt, no snow, no slipping, and im not aggressively hitting the pedal to cause tire skid)

I don't know necessarily where to start on figuring out what the issue was......
so far the connections on the battery does not seem corroded (the battery was replaced this july)
it drives some trips normal with full power and I don't seem to think there would be an issue with the alternator....
someone suggested a engine to body ground..which does have a small amount of green oxidizing on it but dosent seem rusted from what I can tell....

anyone got any ideas? I just really want to figure this out