Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1985ASTRO VAN M L4-151 2.5LREPAIR AND DIAGNOSISTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSBRAKE PADS - FRONT BRAKE SQUEAL
1985 Chevrolet Astro Van M L4-151 2.5L
Brake Pads - Front Brake Squeal
1985 Chevrolet Astro Van M L4-151 2.5LSECTION Brake Pads - Front Brake Squeal
GMC NUMBER: 87-T-67
GROUP: 5 -Brakes
DATE: July, 1987
CORPORATE
NUMBER: 765003
SUBJECT: FRONT BRAKE SQUEAL
MODELS: 1979-1987 LIGHT DUTY TRUCK MODELS
Some 1979-1987 light duty truck models may experience a high pitched squeal coming from the front of the vehicle under light to moderate brake applications. Revised noise insulated brake pads (called SAS II) with an insulator permanently attached to the metal portion of the brake pads are now available to help reduce brake squeal. These brake pads are available for the light duty trucks listed below.
OPTION PART
MODEL CODE YEAR NUMBER
M Van
Manual Brakes JB1 1985-87 12321436
Power Brakes JB3 1985-87 12321435
S/T JB1, JM5, 1982-87 12321426
All JM7
R/V, G - 1,2 Under JB1 1983-87 12321434
8,000 GVW and Manual Brakes
R/V - 1, 2 Under JB3, JD3 JB5, JD5 1984-87 12321435
8,000 GVW and Power JB6, JD6
Brakes
G - 1,2 Under 8,600 JB3, JB5 JD5 1984-87 12321435
GVW and Power Brakes
R/V - 2 8,600 GVW JB7, JD7 1979-87 12321437
and Power Brakes
GROUP: 5 -Brakes
DATE: July, 1987
CORPORATE
NUMBER: 765003
SUBJECT: FRONT BRAKE SQUEAL
MODELS: 1979-1987 LIGHT DUTY TRUCK MODELS
Some 1979-1987 light duty truck models may experience a high pitched squeal coming from the front of the vehicle under light to moderate brake applications. Revised noise insulated brake pads (called SAS II) with an insulator permanently attached to the metal portion of the brake pads are now available to help reduce brake squeal. These brake pads are available for the light duty trucks listed below.
OPTION PART
MODEL CODE YEAR NUMBER
M Van
Manual Brakes JB1 1985-87 12321436
Power Brakes JB3 1985-87 12321435
S/T JB1, JM5, 1982-87 12321426
All JM7
R/V, G - 1,2 Under JB1 1983-87 12321434
8,000 GVW and Manual Brakes
R/V - 1, 2 Under JB3, JD3 JB5, JD5 1984-87 12321435
8,000 GVW and Power JB6, JD6
Brakes
G - 1,2 Under 8,600 JB3, JB5 JD5 1984-87 12321435
GVW and Power Brakes
R/V - 2 8,600 GVW JB7, JD7 1979-87 12321437
and Power Brakes
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.