In my first post ,asking about safty belt,the trubbel is that the inspector test them by pulling hard, and tehey dident lock-As all 4 belt react in the same way.I am now asking if they lock up by pulling ihave tested 4 other Suburbans at car delers and all of them does the same. My cuestion is shall tehy lock up by pulling when the car stand still, If i drive and break and pull they lock up fine,.So i want to know -wath is normal

 

The seatbelts are designed that way. Unless the vehicle is under rapid deceleration, the seatbelts do not lock. They are supposed to move freely.

When you brake hard, the mechanism engages and the seatbelt locks.

 

they should lock with a quick pull of your hand...the vehicle stopped or moving makes no difference... i do 2 quick pulls as quick and hard as I can...that is how they are tested during an inspection.

how old is the sub?

 

Its a 1996 whit 8 bult weels and 6.5 liter turbo diesel,and as i have tested all subs of that yers as i have been abel to find at dealers and some others, all work as mine, but it is not easy to convnce the autoritis ,so i hope som forum help, can tell me how they are suposed to work.