There is a problem with the SRS (Supplemental Restraint System), air bags.
Take this truck to a professional for repair. Working on the SRS is hazardous and is not a DIY repair. Something is wrong with the SRS or the light would not be on.
Supplemental/Safety Restraint Sytstem. ie: airbag, seatbelt...
seat belt sensor needs to be replaced
There is a problem with the SRS. Not a DIY repair. Take it to a professional.
SRS, Supplemental Restraint System, is for the air bags.
Simple Random Sample
The air bag is buggered
speed response system
== == I am not familiar with SES. Do you mean SRS? If so, seek professional help when dealing with the SRS (Air Bags) on your vehicle. Serious injury can occur when working with the SRS.
safety restraint system
It means there is a problem with the SRS (Supplemental Restraint System) or Air Bags. This is a repair for a professional.