Jim Grant's Tech Tips
K2500, New SUV with a brake History
Q: Jim, Im having some serious brake
problems on our 99 Suburban K2500 4x4 with a 7.4L engine. Heres
the history: The rear axle seals leaked when new. Warranty replaced the
seals and installed new brake linings on both sides of the rear axle.
The front rotors warped fairly early on, and were replaced under warranty.
Also the front brake pads were replaced. The problem is continuing brake
rotor warpage (now ready for second set of new rotors at 33K), and violent
brake action if the linings get the least bit of moisture on them. Is
it possible that the rear linings and front pads are not compatible with
each other, or not compatible with the ABS System?
Your wisdom on this please, I am about out of warranty at 36K and am not
happy with the brake problems we are having.
sure about the wisdom part, but I can tell you that brake problems that
you are experiencing on your Suburban are not uncommon. The ALLDATA Information
System shows Service Bulletin # 99-05-24-001A addressing braking concerns
that you are describing. Vehicles affected range from 92 to 99
Chevrolet, GMC, pick-ups and Suburbans . Also 96 to 2000 Chevy and
is often described as a brake pull while braking or premature front brake
wear. The fix requires the installation of upgraded front brake pads and
rear brake shoes. Also the brake systems Combination Valve must
be replaced on Suburbans. This valve regulates brake fluid pressure to
the front and rear brakes. If the valve is not replaced as outlined in
the service bulletin other brake problems can result
that are doing more than their share of the work to stop a vehicle will
overheat and wear rapidly. This greater amount of heat will also take
its toll on the front brake rotors causing them to warp. Also, the rear
brakes should not be acting violet when wet.
note, I did a check at the National Highway Traffic Safety Administrations
Consumer Complaints Database and found that your vehicle is not alone
with this problem. It may be in your best interest to register your complaint
with NHTSA on the web at www.nhtsa.dot.gov