speaking of which its a 97 GMC jimmy 4x4 and i used it to try and pull out my 91 s10 blazer to get that going for a 2nd vehicle. but it has push button fourwheel drive and when i had the tow strap hooked up i put it in 4hi and started to pull out the blazer and it would go into 2hi on its own so then i tried 4low and started to pull and it went into 2hi again when you start to break traction then when i tried to put in in 4hi or 4low again the buttons were flashing at me so i gave up and drove it home well when the old lady took it the next day to go to an appointment it broke down when she got into town it started making a grinding noise so she pulled into a gas station and my sister rescued her and they brought it to the shop. I'm wondering what it is do you have any ideas?????????????