gucci
05-19-2009, 11:08 AM
ok heres the deal i have a 2001 gmc jimmy 4x4 its acting funny when i go down the street and i hold it at a steady mph the it acts like im hitting the brake and then gas the rpms jump3 or 400 rpms back and forth until i hit the gas to speed up and the check engine light is on and i put 2 diff code readers on it and were u plug it in at doesnt work it wont read on them at all they were the ones that power up when u plug it in and it didnt work i have the key on and everytinh aany ideas on that and the 4x4 its push on the fly u here it engage but the 4x4 dont work any ideas on that i think the tranny might be going out i dont knowi could use everyones input on this thank u guys