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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 GMC Safari car and truck
repair procedures including GMC engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
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BRAKE SERVICE PROCEDURES FOR 2003 GMC Safari AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 GMC Safari cars and light trucks from 1990+.
Disc Brakes -> Delco Single Piston Sliding Caliper -> Precautions -> Brake Disc Service -> Brake Lines & Linings -> Brake Roughness -> General
Vehicle: 2003 GMC Safari 4.3 V6 GAS
Brake Lines & Linings
Remove one of the front wheels and inspect the brake disc, caliper and linings.
Do not allow any oil or grease on the linings. It is recommended that linings be replaced in sets when worn or damaged.
If the caliper is cracked or fluid leakage through the casting is evident, it must be replaced as a unit.
Brake Roughness
The most common cause of brake chatter on disc brakes is a variation in thickness of the disc. If roughness or vibration is encountered during highway operation or if pedal pumping is experienced at low speeds, the disc may have excessive thickness v...
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BRAKE SERVICE PROCEDURES FOR 2003 GMC Safari AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 GMC Safari cars and light trucks from 1990+.
Hydraulic Brake Systems -> Brake System Bleed -> Hydraulic System Flush -> Manual Bleed -> Master Cylinder Bleed -> Parking Brake Bleed -> Pressure Bleed
Vehicle: 2003 GMC Safari 4.3 V6 GAS
Manual Bleed
- If vehicle is equipped with power brakes, remove vacuum reserve by applying brakes several times with engine off.
- Fill master cylinder reservoirs with suitable brake fluid.. Ensure to always keep master cylinder reservoirs at least half full during entire bleeding procedure.
- If master cylinder is suspected to have air in the bore, it must be bled first. To bleed master cylinder, proceed as follows:
- Disconnect forward brake pipe connection at master cylinder.
- Allow brake fluid to fill master cylinder bore until it begins to flow from forward pipe connector port.
- Connect...
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BRAKE SERVICE PROCEDURES FOR 2003 GMC Safari AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 GMC Safari cars and light trucks from 1990+.
Hydraulic Brake Systems -> Component Replacement -> Master Cylinder
Vehicle: 2003 GMC Safari 4.3 V6 GAS
Master Cylinder
- On models equipped with manual brake system, disconnect master cylinder pushrod from brake pedal.
- On all models, disconnect all wire conne...
CLICK HERE TO GET FULL ACCESS TO 2003 GMC Safari BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 2003 GMC Safari AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 GMC Safari cars and light trucks from 1990+.
Disc Brakes -> Delco Single Piston Sliding Caliper -> Brake Pad Service -> Installation -> Removal
Vehicle: 2003 GMC Safari 4.3 V6 GAS
Removal
- Remove caliper as outlined in. "Caliper Service."
- Remove inboard pad with retainer spring.
- Remove outboard pad and position caliper on front suspension so brake hose will not support weight of caliper.
- Remove two sleeves from inboard ears of caliper.
- Remove four rubber bushings from grooves in each of caliper ears.
Installation
- Lubricate new sleeves, rubber bushings, bushing grooves and mounting bolt ends with lubricant part No. 19010909, or equivalent.
- Install new bushings and sleeves in caliper ea...
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BRAKE SERVICE PROCEDURES FOR 2003 GMC Safari AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 GMC Safari cars and light trucks from 1990+.
Drum Brakes -> Inspection -> Adjuster Mechanism -> Backing Plate -> Brake Drums -> Brake Linings & Springs -> General System -> Parking Brake Cable
Vehicle: 2003 GMC Safari 4.3 V6 GAS
General System
- Inspect components for damage or unusual wear. Replace as required.
- Inspect backing plate mounting bolts and ensure they are tight.
- Inspect wheel cylinders. Excessive fluid indicates cup leakage and need for wheel cylinder replacement. Slight amount of fluid is always present and is considered normal, acting as lubricant for cylinder pistons.
- Inspect adjuster screw operation. If satisfactory, lightly lubricate adjusting screw and washer with suitable brake lube. If operation is unsatisfactory, replace.
- Clean rust and dirt from shoe contact surfaces on backing plate using fi...
CLICK HERE TO GET FULL ACCESS TO 2003 GMC Safari BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 2003 GMC Safari AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 2003 GMC Safari cars and light trucks from 1990+.
Hydraulic Brake Systems -> Adjustments -> Height Sensing Proportioning Valve
Vehicle: 2003 GMC Safari 4.3 V6 GAS
Height Sensing Proportioning Valve
The height sensing proportioning valve must be adjusted whenever the valve and/or linkage is disassembled or removed for service. In addition, adjustment should be inspected if excessive front wheel lock-up is experienced with a lower than desired brake application rate when vehicle is at or near maximum GVWR.
- Raise and support vehicle, leave wheels on and allow axle to hang freely.
- Remove lever retaining nut and disconnect lever from valve shaft,. Fig. .
- Rotate valve shaft to permit installation of correct adjustment gauge,. Fig. , ensure D shaped hol...
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