INFORMATION ON SEAT BELT OPERATION. GMC Truck Jimmy

SUBJECT: INFORMATION ON SEAT BELT OPERATION, FEATURES AND LOCATION

MODELS: 1988-95 CHEVROLET AND GMC TRUCK C/K PICKUPS 1983-95 CHEVROLET AND GMC TRUCK S/T MODELS

THE FOLLOWING PASSENGER SEAT BELTS OPERATE DIFFERENTLY FROM THE COMPARABLE DRIVER'S SEAT BELT.

1. RIGHT FRONT PASSENGER SEAT BELTS (FIGURE 1, POSITION 1) ON: 1988-95 C/K PICKUPS 1992-95 C/K CREW CAB 1983-95 S/T PICKUPS AND UTILITIES

2. LEFT AND RIGHT REAR SECOND SEAT OUTBOARD BELTS (FIGURE 1, POSITION 2) ON: 1992-95 C/K CREW CAB 1995 S/T UTILITIES

THE REASON FOR THE DIFFERENCE IS TO ALLOW A CHILD RESTRAINT (CHILD SEAT) TO BE USED IN THESE PASSENGER POSITIONS. CHILD RESTRAINTS REQUIRE THE LAP PORTION OF THE SEAT BELT TO FIRMLY TIGHTEN AROUND THE RESTRAINT. TO ACCOMMODATE THIS REQUIREMENT, BELTS IN THE AFOREMENTIONED POSITIONS ARE EQUIPPED WITH A RATCHETING FEATURE ACTIVATED BY PULLING THE LAP BELT ALL THE WAY OUT. ONCE THE BELT HAS BEEN PULLED ALL THE WAY OUT, IT BECOMES A ONE WAY MECHANISM THAT WILL RETRACT UNTIL IT CONTACTS A SOLID OBJECT LIKE A CHILD RESTRAINT OR PERSON, BUT WILL NOT EXTEND AGAIN UNTIL IT HAS BEEN FULLY RETRACTED ALL THE WAY BACK TO THE STOP BUTTON ATTACHED TO THE BELT. THIS FEATURE IS OFTEN REFERRED TO AS A CHILD HOLD OUT MECHANISM.

IF A PASSENGER FINDS THAT THE BELT BECOMES TIGHT AND UNCOMFORTABLE WHILE RIDING, IT MAY INDICATE THAT THE BELT WAS PULLED ALL THE WAY OUT DURING THE BUCKLING PROCESS, THUS ACTIVATING THE RACHETING FEATURE. THIS CONDITION CAN BE AVOIDED BY TAKING CARE NOT TO PULL THE BELT TO ITS VERY END WHEN BUCKLING UP.

ANOTHER CONDITION THAT MAY OCCUR IS THE BELT NOT EXTENDING WHEN DESIRED. THIS IS OFTEN CAUSED BY THE BELT, AFTER HAVING BEEN IN THE RATCHET MODE, NOT BEING RETRACTED ALL THE WAY BACK TO THE STOP. USUALLY AIDING THE BELT BACK TO THE STOP BY WIGGLING, REMOVING OBSTRUCTIONS, PULLING RELEASING, ETC. WILL ALLOW THE BELT TO ONCE AGAIN EXTEND. THIS CONDITION FREQUENTLY HAPPENS WHEN THE SHOULDER PORTION OF THE BELT FULLY RETRACTS BEFORE THE LAP PORTION OF THE BELT REACHES THE STOP.

ALL THE CONDITIONS DESCRIBED ABOVE ARE PART OF THE NORMAL OPERATION OF BELTS EQUIPPED WITH THE CHILD HOLD OUT MECHANISM, AND WILL NOT BE ELIMINATED BY REPLACING THE BELT.

FIGURES: 1 CAPTIONS: FIGURE 1 - SEAT POSITIONS UTILIZING CHILD HOLD OUT MECHANISM

Object Number: 89970 Size: LF

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.