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 MANUALSCHEVROLET1982S10,T10 P/U,BLAZER V6-173 2.8LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSIDLE/THROTTLE SPEED CONTROL UNIT
1982 Chevrolet S10,T10 P/U,Blazer V6-173 2.8L
Idle/Throttle Speed Control Unit
1982 Chevrolet S10,T10 P/U,Blazer V6-173 2.8LSECTION Idle/Throttle Speed Control Unit
ISC PLUNGER ADJUSTMENT CHART
Identification Plunger Length Plunger Length
Letter Dimension "A" Dimension "B"
None 14.1 mm (9/16") 5.6 mm (7/32")
None 16.3 mm (41/64") 8.0 mm (5/16")
X 18.5 mm (47/64") 10.0 mm (25/6'4")
A 19.3 mm (49/64") 10.8 mm (27/64")
Y 20.5 mm (51/64") 12.0 mm (15/32")
S 21.2 mm (27/32") 12.7 mm (1/2")
Z 22.5 mm (7/8") 14.0 mm (35/64")
G 23.2 mm (29/32") 14.7 mm (37/64")
E 25.6 mm (1LL) 17.1 mm (43/64")
L 27.5 mm (1 -3/32") 19.0 mm (3/4")
J 30.0 mm (1-3/16") 21.5 mm (27/32")
N 32.0 mm (1-17/64") 23.5 mm (59/64")
T 34.0 mm (1-11/32") 25.5 mm (1")
Identification Plunger Length Plunger Length
Letter Dimension "A" Dimension "B"
None 14.1 mm (9/16") 5.6 mm (7/32")
None 16.3 mm (41/64") 8.0 mm (5/16")
X 18.5 mm (47/64") 10.0 mm (25/6'4")
A 19.3 mm (49/64") 10.8 mm (27/64")
Y 20.5 mm (51/64") 12.0 mm (15/32")
S 21.2 mm (27/32") 12.7 mm (1/2")
Z 22.5 mm (7/8") 14.0 mm (35/64")
G 23.2 mm (29/32") 14.7 mm (37/64")
E 25.6 mm (1LL) 17.1 mm (43/64")
L 27.5 mm (1 -3/32") 19.0 mm (3/4")
J 30.0 mm (1-3/16") 21.5 mm (27/32")
N 32.0 mm (1-17/64") 23.5 mm (59/64")
T 34.0 mm (1-11/32") 25.5 mm (1")
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.