i know on these forums it good to look then ask but i don't know where 2 start lookin..... i have a 96 blazer 4.3 liter bout 181000 miles on it... took my truck to a shop to get a head replaced.... note my truck was fine except for that no noise no noting....while they fix it they tell me i had a badlifteranda my pistonrod was bad..and they fixed the problem ... they said in order them to fix i they had to shave[>:] where the piston goes forthelifter to works.... so i go pick my truck and it runs like crap all my gage lights are on abs brake light check gages light engine service light.... the truck seems like it wants to cut off on its own...it wont shift at the right points.... it surges like every 7 secs....and has no power.... i tried to take it but but it just died the engine not lock cause it still key still turns over......... What could they have done to my truck