Many seatbelt tensioners have a lock mechanism that prevents slack when
using the belt to fasten down a child seat. If you pull the belt all the
way out, the lock will engage so when it is holding in a car seat it won't
move. The only way to disengage the lock is to retract the seatbelt all the
way back in. If you are extending the seatbelt to its full length then this
could be your issue.
The other thing that could be happening is there is a lock that engages when
the truck slows sharply, preventing anyone restrained by the seatbelt from
slumping forward and hitting the dash. There is a pendulum inside the
mechanism that engages the lock and it could be stuck in the forward
position engaging the lock all the time. In this case it's just a matter of
removing the plastic trim and using a judicious squirt of WD-40 on the
mechanism to free it up.
I don't buy the line about your dealer just not wanting to fix it. Why
would any dealer want to forego making money on such a simple job that would
be almost all profit for them? Whether it's under warranty or if you pay
for it they still get paid. Perhaps they don't understand the problem or
comprehend the mechanism's functions, which seems more likely than turning
down easy money.
Cheers - Jonathan
I've had several dealers turn down easy money
Explorer power lock solenoids (we just greased the linkage)
Navigator valve job (they all idle rough)
Passat evaporator core (you were just low on Freon....see ya next week)
You might remind them that seatbelt failure during MVA in this case might
expose GM and the dealership to considerable liability. That ought to get
them going. I've found dealers agreeable when their wallets are at risk.
If the seat has some rings in the back of the seat it wont go out after
fastened. This is to protect the child seat in the front seat . I would like
to find another replacement year to remove this feature as I aint having no
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