1998 GMC Safari Brake Service (ONLINE REPAIR MANUALS)

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BRAKE SERVICE PROCEDURES FOR 1998 GMC Safari AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1998 GMC Safari cars and light trucks from 1990+.

Anti-lock Brakes -> Kelsey-Hayes -> Diagnosis & Testing -> 1997 Astro -> 1997 C & K Series -> 1997 G-Series -> 1997 P-Series -> 1997 S & T Series -> 1997-99 -> 1997-99 Except 1999 Sierra & Silverado -> 1997-99 G Van & P Series -> 1998 Astro -> 1998 C & K Series -> 1998 G-Series -> 1998 P-Series -> 1998 S & T Series -> 1999 Astro -> 1999 C & K Series Except Sierra & Silverado -> 1999 G-Series -> 1999 P-Series -> 1999 S & T Series -> 1999 Sierra & Silverado -> 2000 Astro -> 2000 C & K Series except Sierra, Silverado, Suburban, Tahoe & Yukon -> 2000 G-Series -> 2000 S & T Series -> 2000 Sierra -> 2000 Silverado -> 2000 Suburban -> 2000 Tahoe -> 2000 Yukon -> 2000-01 -> 2000-01 G Van -> 2001 Astro -> 2001 C & K Series -> 2001 G-Series -> 2001 S & T Series -> Accessing Diagnostic Trouble Codes -> Astro, Safari & S & T Series -> C & K Series -> Clearing Diagnostic Trouble Codes -> Connector Pin ID -> Diagnostic Process -> Diagnostic Tests -> Diagnostic Trouble Code Interpretation -> Enhanced Diagnostics -> G Van & P Series -> Intermittents & Poor Connections -> Temperature Vs. Resistance -> Wiring Diagrams
Vehicle: 1998 GMC Safari 4.3 V6 GAS

Accessing Diagnostic Trouble Codes

Diagnostic trouble codes (DTCs) can only be read by connecting a suitably programmed scan tool to the Data Link Connector (DLC) and following the tool manufacturer instructions.

Diagnostic Trouble Code Interpretation

Refer to Figs. and , for Diagnostic Trouble Code (DTC) interpretation.

Wiring Diagrams

Refer "Wiring Diagrams" in "Vehicle Systems"

Connector Pin ID

On 2000 S & T Series only, ensure correct anti-lock brake system connector pin identifications are used.

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Diagnostic Process

  • Inspect master cylinder reservoir fluid level and for possible fluid...
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CLICK HERE TO GET FULL ACCESS TO 1998 GMC Safari BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1998 GMC Safari AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1998 GMC Safari cars and light trucks from 1990+.

Hydraulic Brake Systems -> Component Service -> Assemble -> Bendix Master Cylinder -> Delco Master Cylinder -> Disassemble -> Tracker Master Cylinder -> Wheel Cylinder
Vehicle: 1998 GMC Safari 4.3 V6 GAS

Delco Master Cylinder

When performing the following procedures, refer to Figs. and noting that the composite reservoir may vary in design.

Disassemble
  • Remove master cylinder from vehicle.
  • Remove reservoir cover and diaphragm. Discard old brake fluid in reservoir.
  • Inspect cover and diaphragm. Replace if cut, cracked or deformed.
  • Remove fluid level switch and proportioning valve assembly, if equipped.
  • Depress primary piston and remove lock ring.
  • Plug primary fluid outlet (outlet nearest to cowl when master cylinder is installed), then apply compressed air into secondary fluid outlet t...

CLICK HERE TO GET FULL ACCESS TO 1998 GMC Safari BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1998 GMC Safari AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1998 GMC Safari cars and light trucks from 1990+.

Drum Brakes -> Adjustments -> Astro, Bravada, S & T Series & Safari -> Automatic Apply Parking Brakes -> Aztek, Montana, Silhouette, Trans Sport & Venture -> C & K Series -> Control Rod -> G & P Series -> Lever Type -> Manual Parking Brake -> Optional Method -> Pedal Type -> Propeller Shaft Type -> Service Brake -> Standard Method -> Tracker
Vehicle: 1998 GMC Safari 4.3 V6 GAS

Service Brake

These brakes have self-adjusting shoe mechanisms that ensure correct lining-to-drum clearances at all times. The automatic adjusters operate only when the brakes are applied as the vehicle is moving rearward or when the car comes to an uphill stop.

Although the brakes are self-adjusting, an initial adjustment is necessary after the brake shoes have been relined or replaced, or when the length of the adjusting screw has been changed during some other service operation.

Frequent usage of an automatic transmission forward range to halt reverse vehicle motion may prevent the ...

CLICK HERE TO GET FULL ACCESS TO 1998 GMC Safari BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1998 GMC Safari AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1998 GMC Safari cars and light trucks from 1990+.

Anti-lock Brakes -> Kelsey-Hayes -> Precautions -> Battery Ground Cable -> Delco LOC II -> General Service Precautions -> Radio Security System -> Theftlock
Vehicle: 1998 GMC Safari 4.3 V6 GAS

Battery Ground Cable

Prior to service disconnect battery ground cable and isolate as required.

Radio Security System

Theftlock

If the Theftlock system is active when battery power is interrupted, the customers security code must be entered to restore proper function of the radio. To unlock a secured radio after power loss, proceed as follows:

  • "LOC" appears with ignition in On position.
  • Press "NM" and "000" will appear on display.
  • Press "NM" again to make last two digits agree with security code.
  • Press "HR" to make first 1 or 2 digits agree with security code.
  • Press "AM-FM" to select code entered. "SEC" wi...

CLICK HERE TO GET FULL ACCESS TO 1998 GMC Safari BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1998 GMC Safari AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1998 GMC Safari cars and light trucks from 1990+.

Anti-lock Brakes -> Kelsey-Hayes -> System Service -> 1997-2000 C & K Series Except 1999-2000 Sierra, Silverado & 2000 Suburban, Tahoe & Yukon -> 1997-2000 w/310 ABS -> 1999-2000 Sierra, Silverado & 2000 Suburban, Tahoe, Yukon & 2001 C & K Series -> 2000-01 w/325 ABS -> Astro & Safari -> Brake Pressure Modulator Valve (BPMV) -> Brake System Bleed -> C & K Series Except C3500HD -> C3500HD -> Component Replacement -> Electronic Brake Control Module (EBCM) -> Front Wheel Speed Sensor -> G Van -> Installation -> Manual Bleed -> P Series -> Pressure Bleed -> Removal -> S & T Series
Vehicle: 1998 GMC Safari 4.3 V6 GAS

Brake System Bleed

Gravity and vacuum bleeding procedures are not recommended for use with the anti-lock brake system. The manual bleed procedure is the preferred method, although pressure bleeding is also possible. Do not pump the brake pedal during the bleeding process, as fluid aeration may occur.

Manual Bleed
  • Raise and support vehicle, then connect a clear plastic tube to brake bleed screw at righthand rear wheel.
  • Place free end of tube in a glass jar partially filled with clean brake fluid. Ensure end of tube remains submerged in fluid and master cylinder reservoir is kept full.
  • ...

CLICK HERE TO GET FULL ACCESS TO 1998 GMC Safari BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1998 GMC Safari AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1998 GMC Safari cars and light trucks from 1990+.

Hydraulic Brake Systems -> Component Replacement -> Master Cylinder
Vehicle: 1998 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 1998 GMC Safari BRAKE SERVICE PROCEDURES

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