1993 GMC Sonoma Brake Service (ONLINE REPAIR MANUALS)

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We have info for following modifications of 1993 GMC Sonoma

  • 1993 GMC Sonoma 4.3 V6 GAS, CID:262, Fuel Injection, Aspiration:262, Engine VIN:, Desg:Z
  • 1993 GMC Sonoma 4.3 V6 GAS, CID:262, Fuel Injection, Aspiration:262, Engine VIN:, Desg:W
  • 1993 GMC Sonoma 2.8 V6 GAS, CID:173, Fuel Injection, Aspiration:173, Engine VIN:, Desg:R
  • 1993 GMC Sonoma 2.5 L4 GAS, CC:2474, CID:151, Fuel Injection, Aspiration:151, Engine VIN:, Desg:A

BRAKE SERVICE PROCEDURES FOR 1993 GMC Sonoma AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1993 GMC Sonoma cars and light trucks from 1990+.

Anti-lock Brakes -> ABS-VI Anti-Lock Brake System -> Description -> System Operation
Vehicle: 1993 GMC Sonoma 2.8 V6 GAS

System Operation

This braking system, Fig. , is designed to reduce the occurrence of wheel lock-up during severe braking conditions. To accomplish this function, the system regulates hydraulic brake line pressure when a microprocessor, located inside the Electronic Brake Control Module (EBCM), determines one or more of the wheels is about to lose traction during braking. The EBCM will allow the hydraulic modulator to change brake pressures several times each second to provide maximum vehicle control. This system cannot increase brake pressure above the master cylinder pressure appl...

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BRAKE SERVICE PROCEDURES FOR 1993 GMC Sonoma AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1993 GMC Sonoma cars and light trucks from 1990+.

Drum Brakes -> Adjustments -> 1992-94 -> 1992-94 Lumina APV, Silhouette & Trans Sport -> 1993-96 Astro/Safari & 1995-96 S & T Series -> 1995-96 -> Automatic Apply Parking Brakes -> Bravada, 1992 Astro/Safari & 1992-94 S & T Series -> C & K Series -> Control Rod Adjustment -> Duo-Servo Brakes -> Except 1992-94 Lumina APV, Silhouette & Trans Sport -> G-Van & P Series -> Lever Type -> Lumina APV, Silhouette & Trans Sport -> Manual Parking Brake -> Non-Servo Brakes -> Optional Method -> Pedal Type -> Propeller Shaft Type -> Service Brake -> Standard Method -> Tracker
Vehicle: 1993 GMC Sonoma 2.5 L4 GAS

Service Brake

Except 1992-94 Lumina APV, Silhouette & Trans Sport

These brakes have self-adjusting shoe mechanisms that assure 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 ra...

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BRAKE SERVICE PROCEDURES FOR 1993 GMC Sonoma AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1993 GMC Sonoma cars and light trucks from 1990+.

Power Brake Units -> Bendix Brake Boosters -> Power Brake Unit Service -> Accumulator Service -> Assemble -> Bleeding Booster -> Cleaning & Inspection -> Disassemble
Vehicle: 1993 GMC Sonoma 2.5 L4 GAS

Disassemble

  • Place accumulator compressor tool No. J-26889 or equivalent, around end of accumulator.
  • Install nut onto stud as shown in Fig. , then depress the accumulator with a C-clamp.
  • Remove retainer by using a punch.
  • Release C-clamp and remove accumulator compressor tool.
  • Remove accumulator, O-ring, retainer, plug and spring, Fig. .
  • Remove retainer, output pushrod, baffle, piston return spring and retainer.
  • Using a suitable saw, cut off eyelet of pedal rod, then remove the boot.
  • Remove nut, bracket and bolts, then separate cover from housing.
  • Remove piston assembly and seals...

CLICK HERE TO GET FULL ACCESS TO 1993 GMC Sonoma BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1993 GMC Sonoma AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1993 GMC Sonoma cars and light trucks from 1990+.

Power Brake Units -> Bendix Brake Boosters -> Power Brake Unit Replacement -> Astro & Safari -> C & K Series -> Full Size Except C & K Series
Vehicle: 1993 GMC Sonoma 2.8 V6 GAS

Astro & Safari

For power brake unit replacement procedures, refer to "Delco Moraine Brake Boosters."

Full Size Except C & K Series

Before disconnecting lines from power unit, depress and release brake pedal several times to allow pressure to discharge from accumulator.

  • On P30 motor home, raise and support vehicle.
  • On all models, remove master cylinder to power brake unit attaching nuts, then position master cylinder aside. Do not disconnect brake lines from master cylinder.
  • Disconnect hydraulic lines from power brake unit. Plug all lines and ports to prevent fluid loss and ...

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BRAKE SERVICE PROCEDURES FOR 1993 GMC Sonoma AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1993 GMC Sonoma cars and light trucks from 1990+.

Anti-lock Brakes -> ABS-VI Anti-Lock Brake System -> Troubleshooting
Vehicle: 1993 GMC Sonoma 2.8 V6 GAS

Refer to ABS wiring diagrams and connector terminal identification, Figs. through , as aids when performing a visual inspection of anti-lock...

CLICK HERE TO GET FULL ACCESS TO 1993 GMC Sonoma BRAKE SERVICE PROCEDURES

BRAKE SERVICE PROCEDURES FOR 1993 GMC Sonoma AUTOMOBILES

Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1993 GMC Sonoma cars and light trucks from 1990+.

Disc Brakes -> Bendix Single Piston Sliding Caliper -> Precautions -> Brake Disc Service -> Brake Lines & Linings -> Brake Roughness -> General
Vehicle: 1993 GMC Sonoma 2.5 L4 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 all 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 thickne...

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