Been lurking for a while here and now I need some help. I bought a used 95 chevy k2500 and the original owner told me he changed the computer chip in the truck to a towing version. My gas mileage is horrendous and it just doesnt seem to have the power it should. What I would like to do is take out the ECM and check what chip he put in and possibly return it to a stock one or something that will give me better mileage.
My problem is that I can't remove the ECM. I take out the glove box and loosen the 2 screws that hold it to the fan motor cowling, but there seems to be something hanging on to in the rear or underside of the module.
I can's see anything in there as it is crammed. Has anyone removed their ECM and can tell me what I am doing wrong?
Thanks
Jason