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HOMESERVICE MANUALSCHEVROLET1981PICKUP K10, 5.0L ENG VIN H, AUTOMATIC TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSVACUUM DIAGRAMSMODEL IDENTIFICATION
1981 Chevrolet Pickup K10, 5.0L Eng VIN H, Automatic Trans

Model Identification

1981 Chevrolet Pickup K10, 5.0L Eng VIN H, Automatic TransSECTION 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 (2-WD) C
Conventional Chassis (4-WD) K
Conventional Van Chassis G
Forward Control/Stepvan Chassis P
VEHICLE LOAD CAPACITY

Chevrolet Number GMC Number Ton Capacity
10 1500 1/2
20 2500 3/4
30 3500 1
GENERAL MOTORS VACUUM DIAGRAM REFERENCE CHART

Vehicle Model, Series & Engine Application Transmission Equipment Note Figure Number
LIGHT DUTY         
4.1L (250") 6-Cyl.        
  C10/20 Fed. Man.   1
Fed. Man. Aux. Tk. 2
Fed. Auto.   (1)
Fed. Auto. Aux. Tk. 3
Fed. & Calif. Man. A.I.R. 4
Fed. & Calif. Man. Aux. Tk. & A.I.R. 5
Fed. & Calif. Auto. A.I.R. 6
Fed. & Calif. Auto. Aux. Tk. & A.I.R. 7
Fed. Man.   8
Fed. Man.   9
Calif. Auto.   (1)
Fed. Man. Aux. Tk. 10
  K10/20 Fed. Auto.   (1)
Fed. Auto. Aux. Tk. 3
Fed. Man.   1
  G10/20 Fed. Man.   1
Fed. Auto.   11
MEDIUM DUTY         
  4.1L (250") 6-Cyl. C10 & K10 Calif. Man. A.I.R. 4
HEAVY DUTY         
  4.8L (292") 6-Cyl. C20/30 & K20/30 Fed. & Calif. Man. & Auto. A.I.R. 12
Fed & Calif. Man. & Auto. A.I.R. 13
  P20/30 Fed. & Calif. Man. & Auto. A.I.R. 12
LIGHT DUTY         
5.0L (305") V8        
  C10/20 & K10/20 Fed. Man.   14
Fed. Auto.   (1)
Fed. Man.   15
Fed. Auto.   16
Fed. Man. A.I.R. 17
Fed. & Calif. Auto. A.I.R. 18
Calif. Auto. A.I.R. 19
  G10/20 Fed. Man.   14
Fed. & Calif. Auto. A.I.R. 18
Fed. & Calif. Auto. A.I.R. 19
MEDIUM DUTY         
  5.0L (305") V8 C20 Calif. Auto. A.I.R. 19
LIGHT DUTY         
5.71 (350") V8        
  C10/20 & K10/20 Calif. Auto.   (1)
Fed. Man.   (1)
Fed. Auto. A.I.R. 20
Fed. Auto. A.I.R. 18
  G10/20 Fed. Man. A.I.R. 21
Fed. Auto. A.I.R. 22
Fed. & Calif. Auto. A.I.R. 19
  5.71 (350") Diesel V8 Fed. & Calif. Auto.   (1)
MEDIUM DUTY         
5.71 (350") V8        
  C10/20 Calif. Auto. A.I.R. 18
  G10/20 Calif. Auto. A.I.R. 19
HEAVY DUTY         
5.71 (350") V8        
  C20/30 & K20/30 Fed. Man. & Auto. A.I.R. 23
Fed. Man. & Auto. A.I.R. 24
Fed. & Calif. Man. & Auto. A.I.R. 25
  G30 & P20/30 Fed. Man. & Auto. A.I.R. 24
Fed. & Calif. Man. & Auto. A.I.R. 25
Fed. Man. A.I.R. 26
HEAVY DUTY         
7.4L (454") V8        
  C20/30 & K20/30 Fed. & Calif. Man. & Auto. A.I.R. 27
Fed. & Calif. Man. & Auto. A.I.R. 28
(1) Diagrams not available from General Motors.

EMISSION CONTROL DEVICE ABBREVIATIONS 

AIR  - Air Injection Reactor

DVTR  - Diverter Valve

EFE  - Early Fuel Evaporation

EGR  - Exhaust Gas Recirculation

PCV  - Positive Crankcase Ventilation

TRC  - Throttle Return Control

TVS  - Thermal Vacuum Switch

Fig 1: 4.1 L 6-Cyl. Federal Manual Transmission
G09337230Courtesy of GENERAL MOTORS COMPANY
RENDER: 1.0x

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