Chevy Astro Van Questions

Astro van questions and answers.

1997 GMC Safari

Engine Size : 4.3 Vortec
Hi, After a long trip, I pulled into a parking space and went to back out and reverse didn't work, I have to pull in where I can only go forward now. Someone said a

1998 Chevy Asrto van.

Engine size- 4.3L Vortec.
Warning lights: just the ABS
Computer codes: EGR valve code

1996 Chevy Astro 4.3 Vortec V6.

Rear brake line replacement done by unknown shop.
Master cylinder and wheel cylinder replacement.
Rear brakes are inop. was told by repair shop that ABS pump assembly needed to be replaced.

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How Things Work

Brakes- Hydraulic System- How Does It Work

The hydraulic brake system consists of the following:

Hydraulic Brake Master Cylinder Fluid Reservoir: Contains supply of brake fluid for the hydraulic brake system.

Hydraulic Brake Master Cylinder: Converts mechanical input force into hydraulic output pressure. Hydraulic output pressure is distributed from the master cylinder

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Common Engine Codes

Knock Sensor Codes P0325 and P0327

The powertrain control module (PCM) contains integrated knock sensor (KS) diagnostic circuitry. The KS produces an AC voltage at all engine speeds and loads. The PCM then adjusts spark timing based on the amplitude and frequency of the KS signal.

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