C 2500 3/4 Ton Pickup 2WD V8-350 5.7L VIN M 4-bbl (1984)
of specification (150 ft.lbs. or 2 03 N-m). See Section 3C for tightening order.
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Equalize parking brake adjustment.
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Adjust rear service brakes to .030" running clearance.
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Inspect and record front end alignment readings - adjust total toe to specifications (.0" to .14"). Inspect caliper brake line bolt (#34, page 5A8,
Figure 4, 1988 Service Manual X-8832) for mislocation of orifice. The orifice should be located in the unthreaded part of the bolt. If the orifice is
located in a threaded portion of the bolt, then the bolt must be replaced.
NOTICE:
After the preceding inspections and/or adjustments have been made, the vehicle should be road tested to determine if a lead still exists.
Vehicles that lead may lead either right or left when the brakes are applied.
Make all stops on a dry, level (no crown), clean roadway.
FIGURE 1 - CALIPER/KNUCKLE CLEARANCES
IMPORTANT!
EACH APPLICABLE STEP MUST BE THOROUGHLY COMPLETED TO EFFECT A LASTING REPAIR. FAILURE TO COMPLETE THE
PROCEDURE EXACTLY AS WRITTEN MAY RESULT IN AN UNSATISFACTORY REPAIR.
Conduct a series of 5 stops from 55 MPH bringing vehicle to a stop in 5 seconds (15 FPS Sq.). Record amount and direction of lead. Do not slide or lock
wheels.
*
FPS Sq or Ft/Sec2 is the measurement used for calculating the deceleration rate with a decelerometer. Use of decelerometer, when available, is the
preferred method.
PROCEDURE A
Right or left lead
Remove and discard the brake calipers and pads
Refinish brake rotors per Chart 1 (or replace brake rotors if they cannot be brought into spec.)
Inspect and/or adjust front wheel bearing per the procedure in Service Manual Section 3C
Install new Delco Moraine brake calipers See Parts Information for part numbers
Install new Delco Moraine brake pads See Parts Information
Bleed front brakes
Inspect caliper to knuckle clearance. It should be between .010" - .024" in total. If necessary, file the knuckle to obtain clearances. Equalize all upper and
lower clearances per Figure No. 1.
Perform 12 stop burnish procedure. Burnish procedure is mandatory.
