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 MANUALSGMC1983S15 JIMMY 1.9 A, RWD, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCEVACUUM DIAGRAMS - S & T SERIESIDENTIFICATIONMODEL IDENTIFICATION

1983 GMC S15 Jimmy 1.9 A, RWD, Automatic

Model Identification

1983 GMC S15 Jimmy 1.9 A, RWD, AutomaticSECTION Model Identification

Truck models, listed in tables, are identified using manufacturers' letter and number designations. The letters identify the vehicle model series (i.e., "C" is conventional chassis, including Pickup, Blazer and Suburban). The number reference identifies the vehicles load capacity. Refer to following charts for actual letter and number designations.

VEHICLE SERIES IDENTIFICATION

Vehicle Series	I.D. Letter
Conventional Chassis (2WD)	C
Conventional Chassis (2WD)	S
Conventional Chassis (4WD)	K
Conventional Chassis (4WD)	T
Conventional Van Chassis	G
Forward Control/Stepvan Chassis	P

VEHICLE LOAD CAPACITY

Chevrolet Number	GMC Number	Ton Capacity
10	15	1/2
10	1500	1/2
20	2500	3/4
30	3500	1

GENERAL MOTORS VACUUM DIAGRAM REFERENCE CHART

Vehicle Model, Series & Engine			Specification
1.9L 4-Cylinder
S10/15 & T10/15
Application			Fed.
Transmission			Man.
Equipment			N/A
Fig. No.			1
S10/15 & T10/15
Application			Fed.
Transmission			Man.
Equipment			Optional Tank
Fig. No.			2
S10/15 & T10/15
Application			Calif.
Transmission			Auto.
Equipment			N/A
Fig. No.			3
S10/15 & T10/15
Application			Calif.
Transmission			Man.
Equipment			Optional Tank
Fig. No.			4
S10/15 & T10/15
Application			Calif.
Transmission			Man.
Equipment			N/A
Fig. No.			5
S10/15 & T10/15
Application			Calif.
Transmission			Man.
Equipment			Optional Tank
Fig. No.			6
S10/15 & T10/15
Application			Hi. Alt.
Transmission			Man.
Equipment			N/A
Fig. No.			7
S10/15 & T10/15
Application			Hi. Alt.
Transmission			Man.
Equipment			Optional Tank
Fig. No.			8
2.0L 4-Cylinder
S10/15 & T10/15
Application			Fed.
Transmission			Auto.
Equipment			N/A
Fig. No.			9
S10/15 & T10/15
Application			Fed.
Transmission			Man.
Equipment			N/A
Fig. No.			10
S10/15 & T10/15
Application			Fed.
Transmission			Man.
Equipment			Optional Tank
Fig. No.			11
S10/15 & T10/15
Application			Hi. Alt.
Transmission			Man.
Equipment			N/A
Fig. No.			12
S10/15 & T10/15
Application			Hi. Alt.
Transmission			Man.
Equipment			Optional Tank
Fig. No.			13
2.8L V6
S10/15 & T10/15
Application			Fed.
Transmission			Auto.
Equipment			N/A
Fig. No.			14
S10/15 & T10/15
Application			Fed.
Transmission			Auto.
Equipment			Optional Tank
Fig. No.			15
S10/15 & T10/15
Application			Fed.
Transmission			Man.
Equipment			N/A
Fig. No.			16
S10/15 & T10/15
Application			Fed.
Transmission			Man.
Equipment			Optional Tank
Fig. No.			17
S10/15 & T10/15
Application			Calif.
Transmission			All
Equipment			N/A
Fig. No.			18
S10/15 & T10/15
Application			Calif.
Transmission			All
Equipment			Optional Tank
Fig. No.			19

RENDER: 1.0x

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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.