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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Chevrolet G30 VAN car and truck
repair procedures including Chevrolet 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
your 1991 Chevrolet G30 VAN automobile. Try the Automotix DIY solution today!
We have info for following modifications of 1991 Chevrolet G30 VAN
- 1991 Chevrolet G30 VAN 4.3 V6 GAS, CID:262, Fuel Injection, Aspiration:262, Engine VIN:, Desg:Z
- 1991 Chevrolet G30 VAN 6.2 V8 DIESEL, CID:379, Fuel Injection, Aspiration:379, Engine VIN:, Desg:J
- 1991 Chevrolet G30 VAN 5.7 V8 GAS, CID:350, Fuel Injection, Aspiration:350, Engine VIN:, Desg:K
- 1991 Chevrolet G30 VAN 7.4 V8 GAS, CID:454, Fuel Injection, Aspiration:454, Engine VIN:, Desg:N
- 1991 Chevrolet G30 VAN Sportvan 6.2 V8 DIESEL, CID:379, Fuel Injection, Aspiration:379, Engine VIN:, Desg:J
- 1991 Chevrolet G30 VAN Sportvan 5.7 V8 GAS, CID:350, Fuel Injection, Aspiration:350, Engine VIN:, Desg:K
- 1991 Chevrolet G30 VAN Sportvan 7.4 V8 GAS, CID:454, Fuel Injection, Aspiration:454, Engine VIN:, Desg:N
BRAKE SERVICE PROCEDURES FOR 1991 Chevrolet G30 VAN AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Chevrolet G30 VAN cars and light trucks from 1990+.
ANTI-LOCK BRAKES, GENERAL MOTORS -> Rear Wheel Anti-Lock Brake System -> SYSTEM SERVICE -> ELECTRONIC CONTROL UNIT (ECU) -> Except G, R, P & V Models -> G, R, P & V Models -> ISOLATION/DUMP VALVE ASSEMBLY -> SPEED SENSOR -> SPEEDOMETER CALIBRATION
Vehicle: 1991 Chevrolet G30 VAN 4.3 V6 GAS
ELECTRONIC CONTROL UNIT (ECU)
Do not touch electrical connections and pins or allow them to come into contact with brake fluid.
- Disconnect battery ground cable.
- Disconnect electrical connectors from ECU.
- Pry up tab at rear of ECU and remove unit toward front of vehicle.
- Slide unit into bracket until tab locks into hole.
- Inspect electrical connectors for brake fluid contamination, clean with alcohol as needed, then connect electrical connectors to ECU.
ISOLATION/DUMP VALVE ASSEMBLY
- Disconnect brake lines from control valve, the plug lines and open fittings.
- Remove bolts (25) securing...
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BRAKE SERVICE PROCEDURES FOR 1991 Chevrolet G30 VAN AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Chevrolet G30 VAN cars and light trucks from 1990+.
HYDRAULIC BRAKE SYSTEMS, GENERAL MOTORS -> MASTER CYLINDER, Replace
Vehicle: 1991 Chevrolet G30 VAN Sportvan 6.2 V8 DIESEL
- On vehicles w/manual brakes, disconnect master cylinder push rod from brake pedal.
- On all models, disconnect all wire connectors from mas...
CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet G30 VAN BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Chevrolet G30 VAN AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Chevrolet G30 VAN cars and light trucks from 1990+.
DISC BRAKES, GENERAL MOTORS -> Bendix Single Piston Sliding Caliper -> CALIPER SERVICE -> ASSEMBLE -> DISASSEMBLE -> INSTALLATION -> REMOVAL
Vehicle: 1991 Chevrolet G30 VAN 4.3 V6 GAS
REMOVAL
- Siphon two-thirds of brake fluid from master cylinder reservoir serving front disc brakes.
- Raise vehicle, support on jack stands and remove front wheels.
- Bottom the caliper piston in bore. Insert a screwdriver between inboard shoe and piston, then pry piston back into bore. The piston can also be bottomed in the bore with a large C-clamp, Fig. .
- Remove support key retaining screw.
- Drive caliper support key and spring from steering knuckle with a suitable drift and hammer, Fig. .
- Lift caliper from anchor plate and off rotor, Fig. . Hang caliper from coil spring with wire. Do n...
CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet G30 VAN BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Chevrolet G30 VAN AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Chevrolet G30 VAN cars and light trucks from 1990+.
DRUM BRAKES, GENERAL MOTORS -> Drum Brake Service -> Inspection
Vehicle: 1991 Chevrolet G30 VAN 5.7 V8 GAS
- Inspect components for damage or unusual wear. Replace as necessary.
- Inspect backing plate attaching bolts, and ensure they are tight.
- Inspect wheel cylinders. Excessive fluid indicates cup leakage and need for wheel cylinder replacement. A slight amount of fluid is always present and is considered normal, act...
CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet G30 VAN BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Chevrolet G30 VAN AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Chevrolet G30 VAN cars and light trucks from 1990+.
POWER BRAKE UNITS, GENERAL MOTORS -> Tracker Brake Booster -> DESCRIPTION
Vehicle: 1991 Chevrolet G30 VAN Sportvan 7.4 V8 GAS
This unit, Fig. , uses a single vacuum diaphragm with an effective diameter of 7 inches to mechanically increase brake application force with engine vacuum...
CLICK HERE TO GET FULL ACCESS TO 1991 Chevrolet G30 VAN BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1991 Chevrolet G30 VAN AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1991 Chevrolet G30 VAN cars and light trucks from 1990+.
POWER BRAKE UNITS, GENERAL MOTORS -> Delco-Moraine Brake Boosters -> SINGLE DIAPHRAGM TYPE -> Assemble -> BOOSTER SERVICE -> DESCRIPTION -> Disassemble -> OPERATION
Vehicle: 1991 Chevrolet G30 VAN 5.7 V8 GAS
DESCRIPTION
These power brake units, Figs. and , are a combination vacuum-hydraulic brake booster of the vacuum suspended type which use engine intake manifold vacuum and atmospheric pressure for its power.
These units consist of a vacuum power section and an hydraulic master cylinder section. The vacuum power section contains a power piston with rolling diaphragm mechanism and power piston return spring.
The control valve is made up of an air valve and floating vacuum control valve assembly. The reaction mechanism consists of an hydraulic piston, reaction plate and a series...
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