These problems started occuring when I installed the body lift on my truck. The airbag light, security light (security isn't even enabled on my truck,) and occasionally the abs light come on when i'm driving. Usually, when I push down the gas pedal, i will hear a strange rattling/scratching/binding type of noise coming from behind the speedo, and stops when I let off of the pedal. I'm wondering if maybe it's just a bad ground or speedometer cable?

 

Classic ignition switch symptoms:
Anatomy of the Ignition Switch

Concerning the rattling/scratching/binding type noise, the rattling description typically is attributed to either the accelerator or cruise control cables resting on the PCV hose that runs from the intake to the driver side valve cover where the PCV valve is located. The PCV valve rattles during operation and if the cables are resting on the hose, that noise can be transmitted into the cabin.

 

I replaced the ignition switch and lock cylinder last year, so I would hope it wouldn't be that again. As for the PCV valve hose, I will definitely check that out tomorrow and see what I can find. Thanks.