And now a new twist when i call my local parts stores for a new
booster they say there are several for my 79 1/2 ton surburban
depending on the kb number (Brake system type). I think it was
kb5,6,or 7 just look on the label on the left door jamb. However for
reasons i can't imagine someone has scaped this label off. There is no
options label in the glove compartment either. I can see because of
the vacuum line going to the check valve that it is a vacuum type
booster. How do i find the info on the brake system type (Kb number)?
I should have sated first that i took the check valve off with vacuum
line in place and there is plenty of vacuum so i know the booster is
the problem....On Sat, 25 Oct 2003 06:35:50 -0500 (CDT),
The_Gear email@example.com (Steve Cook) wrote:
The brake option codes are actually "jb" codes. If you no longer
have your option code label, you will need to go to a dealership
parts counter and see if they can come up with your brake option
code based on the serial number of your truck. I can't be sure if
this is possible for a 79 vintage truck, but I know it's quite possible
on late model trucks. The other option would be to pull the booster
and simply have it rebuilt at a qualified place. There are heavy
duty shops that have the capabilities to rebuild these boosters.
Finally i replaced the booster, and all is well! Sometimes the worst
case scenario is the solution! Thanks for the helpfull suggestions to
all who provided them...Don aka firstname.lastname@example.org On Sat, 25 Oct
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