Grand Prix V6-191 3.1L (1989)
DO NOT REPLACE ROTORS FOR THE FOLLOWING:
^
Pad Replacement
^
Brake Noise
^
Pedal Effort/Feel
Rotors should be replaced for:
^
Pulsation Concerns
^
Heavy Scoring - In Excess of .060" (1.5 mm)
If the front rotors on a high-pedal-effort vehicle have been previously turned, they should be replaced. It is not always apparent with visual inspection
whether a rotor has been turned. Rotor thickness should be measured with a micrometer. The thickness of a new rotor is 1.040" (26.4 mm). If a rotor
measures 1.025" (26.0 mm) or less, on a vehicle with comments of pedal efforts, the rotor probably has been turned and should be replaced.
C.
REAR BRAKES
Also, the rear calipers should be inspected for caliper slide force. When the caliper is removed for pad replacement, try to move each sleeve with both
thumbs pushing on the end of the sleeve. If one sleeve is found that won't slide, refer to Service Bulletin 91-5-14 issued 10/91 for the procedure to
service the rear caliper sleeves. If one caliper has a sticking sleeve, both calipers should be serviced with this procedure.
PART AVAILABILITY:
Parts are currently available from GMSPO.
WARRANTY INFORMATION:
Labor Operation Number:
H0042 Front
H0043 Rear
Labor Time:
Use Applicable Times