my A.B.S. and brake lite comes on when go thru my gears. i took it to a shop when i push the power to my truck and i get a extreme growl i took it to a truck shop to get it dio. took the boss for a ride to show him and have him experience for himself and asked him if he could plug my truck into a moble recorder/ diagnostic div. (Snopon) and pluged it in and my truck ran like it was new! couldn'nt get it to even grown! on the way back to his shop he drove i stated maybe i should spend 4000.00$ on a snapon machine so i would not experence my ishue so he unpluged the mach. and my noise came back and my lite came back on? WHAT IS THE PROBLEM?

 

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