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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1990 Chevrolet Astro 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 1990 Chevrolet Astro automobile. Try the Automotix DIY solution today!
We have info for following modifications of 1990 Chevrolet Astro
- 1990 Chevrolet Astro 2.5 L4 GAS, CC:2474, CID:151, Fuel Injection, Aspiration:151, Engine VIN:, Desg:E
- 1990 Chevrolet Astro 4.3 V6 GAS, CID:262, Fuel Injection, Aspiration:262, Engine VIN:, Desg:Z
- 1990 Chevrolet Astro 4.3 V6 GAS, CID:262, Fuel Injection, Aspiration:262, Engine VIN:, Desg:B
BRAKE SERVICE PROCEDURES FOR 1990 Chevrolet Astro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 Chevrolet Astro cars and light trucks from 1990+.
POWER BRAKE UNITS, GENERAL MOTORS -> General Service -> CHECKING COMPLAINTS
Vehicle: 1990 Chevrolet Astro 4.3 V6 GAS
Diagnose power brakes systems as if two separate systems exist. Check for faults in the regular brake system first. If no problem exists in the regular brake system, diagnosis the power brake circuit is necessary. For a quick check of proper power unit operation, press the brake pedal firmly and then start the engine. The pedal should fall away slightly and less pressure should be needed to maintain the pedal in any position. On vacuum suspended power units, air will rush into the air intake when the brakes are applied.
To perform another check, remove the stop light switch, ...
CLICK HERE TO GET FULL ACCESS TO 1990 Chevrolet Astro BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1990 Chevrolet Astro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 Chevrolet Astro cars and light trucks from 1990+.
POWER BRAKE UNITS, GENERAL MOTORS -> General Service -> CHECKING COMPLAINTS
Vehicle: 1990 Chevrolet Astro 4.3 V6 GAS
Diagnose power brakes systems as if two separate systems exist. Check for faults in the regular brake system first. If no problem exists in the regular brake system, diagnosis the power brake circuit is necessary. For a quick check of proper power unit operation, press the brake pedal firmly and then start the engine. The pedal should fall away slightly and less pressure should be needed to maintain the pedal in any position. On vacuum suspended power units, air will rush into the air intake when the brakes are applied.
To perform another check, remove the stop light switch, ...
CLICK HERE TO GET FULL ACCESS TO 1990 Chevrolet Astro BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1990 Chevrolet Astro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 Chevrolet Astro cars and light trucks from 1990+.
HYDRAULIC BRAKE SYSTEMS, GENERAL MOTORS -> SYSTEM SERVICE -> BLEEDING BRAKES -> BLEEDING MASTER CYLINDER -> BLEEDING PARKING BRAKE -> Flushing Hydraulic System -> Manual Bleeding -> Pressure Bleeding
Vehicle: 1990 Chevrolet Astro 4.3 V6 GAS
BLEEDING BRAKES
Manual Bleeding
- 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. Be sure 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, 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 and tighten forward...
CLICK HERE TO GET FULL ACCESS TO 1990 Chevrolet Astro BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1990 Chevrolet Astro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 Chevrolet Astro cars and light trucks from 1990+.
DRUM BRAKES, GENERAL MOTORS -> Drum Brake Service -> Removal -> 1990-91 C & K SERIES w/NON-SERVO BRAKES -> EXCEPT TRACKER & 1990-91 C & K SERIES w/NON-SERVO BRAKES -> TRACKER
Vehicle: 1990 Chevrolet Astro 4.3 V6 GAS
EXCEPT TRACKER & 1990-91 C & K SERIES w/NON-SERVO BRAKES
- Raise and support vehicle, then remove tire and wheel assembly.
- Remove brake drum. If brake lining is dragging on brake drum, back off brake adjustment by rotating adjustment screw. Refer to individual truck chapter for procedure. If brake drum is rusted or corroded to axle flange and cannot be removed, lightly tap flange to drum mounting surface with a suitable hammer.
- Using brake spring pliers or equivalent, unhook primary and secondary return springs, Figs. through . Observe location of brake parts being removed to aid during ins...
CLICK HERE TO GET FULL ACCESS TO 1990 Chevrolet Astro BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1990 Chevrolet Astro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 Chevrolet Astro cars and light trucks from 1990+.
ANTI-LOCK BRAKES, GENERAL MOTORS -> Four Wheel Anti-Lock Brake System -> SYSTEM SERVICE -> BLEEDING EHCU MODULE
Vehicle: 1990 Chevrolet Astro 4.3 V6 GAS
BLEEDING EHCU MODULE
The EHCU Module should be bled after replacement or if trapped air is in the unit. If bleeding is required the module must be bled thoroughly before the wheel cylinders and calipers.
There are two bleeders on top of the unit that appear to be normal bleeders, Fig. . These are modulator bleeders and must remain closed when the unit is not pressurized.
The internal bleeders are on either side of EHCU module. The valves are used to open the internal passages within the EHCU module. Both bleed valves must be rotated 1/4-1/2 a turn counterclockwise before beginning t...
CLICK HERE TO GET FULL ACCESS TO 1990 Chevrolet Astro BRAKE SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 1990 Chevrolet Astro AUTOMOBILES
Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported 1990 Chevrolet Astro cars and light trucks from 1990+.
ANTI-LOCK BRAKES, GENERAL MOTORS -> Rear Wheel Anti-Lock Brake System -> DESCRIPTION
Vehicle: 1990 Chevrolet Astro 4.3 V6 GAS
The Rear Wheel Anti-Lock (RWAL) system, Fig. , reduces the occurrence of rear wheel lockup during severe braking by regulating rear hydraulic line pressure. Pressure applied to the rear wheel brakes is regulated by a control valve assembly located under the master cylinder. The control valve consists of a dump valve which releases hydraulic pressure into an accumulator, and an isolation valve which holds rear brake pressure. Operation of the dump valve and isolation valve is controlled by an Electronic Control Unit (ECU) which is mounted next to the master cylinder.
The ECU receives ...
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