Chevrolet Silverado / GMC Sierra. Manual - part 6
9
Engine Front Cover Bolt
10
Engine Front Cover
11
Crankshaft Sprocket
12
Crankshaft
13
Crankshaft Balancer Key
14
Crankshaft Lower Bearing
15
Crankshaft Upper Bearing
16
Crankshaft Rear Oil Seal Housing Gasket
17
Crankshaft Rear Oil Seal Retainer Stud
18
Crankshaft Rear Oil Seal Housing
19
Crankshaft Rear Oil Seal Housing Bolt
20
Crankshaft Rear Oil Seal
21
Flywheel
22
Flywheel Bolt
23
Crankshaft Rear Oil Seal Housing Bolt
24
Crankshaft Rear Oil Seal Housing Bolt
25
Crankshaft Rear Oil Seal Housing Stud
26
Oil Pan Nut
27
Crankshaft Rear Oil Seal Housing Locating Pin
28
Crankshaft Upper Bearing
29
Crankshaft Bearing Cap
30
Oil Pump Location Pin
31
Oil Pump Drive Shaft
32
Oil Pump Drive Clamp Bolt
33
Oil Pump Bolt
34
Oil Pan Gasket
35
Oil Pan Baffle Bolt
36
Oil Pan Baffle
37
Oil Pan
38
Oil Pan Drain Plug
39
Oil Pan Drain Plug Seal
40
Oil Pan Bolt
41
Oil Pump Screen
42
Oil Pump
43
Crankshaft Bearing Cap Bolt
44
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
ENGINE IDENTIFICATION
Fig. 6: Engine VIN Locations
Courtesy of GENERAL MOTORS CORP.
Crankshaft Bearing Cap
45
Crankshaft Lower Bearing
46
Crankshaft Position Sensor Reluctor Ring
47
Crankshaft Position Sensor Seal
48
Crankshaft Position Sensor
49
Crankshaft Position Sensor Bolt
50
Crankshaft Balancer Weight
51
Drive Belt Pulley Bolt
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
The Vehicle Identification Number (VIN) Derivative is located on the left side rear of the
engine block (1) or on the right side rear (2) and typically is a 9 digit number stamped or
laser etched onto the engine at the vehicle assembly plant.
The first digit identifies the division.
The second digit identifies the model year.
The third digit identifies the assembly plant.
The fourth through ninth digits are the last six digits of the VIN.
Fig. 7: Engine VIN Numerical Positions
Courtesy of GENERAL MOTORS CORP.
Engines built at the Romulus engine plant have the engine identification number located at
the right front top of the engine block.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
The first digit (1) is the source code.
The second and third digits (2) are the month of build.
The fourth digit (3) is the hour of the build.
The fifth and sixth digits (4) are the date of build.
The seventh, eighth, and ninth digits (5) are the broadcast code.
DIAGNOSTIC INFORMATION AND PROCEDURES
DIAGNOSTIC STARTING POINT - ENGINE MECHANICAL
Begin the system diagnosis by reviewing the Disassembled Views, Engine Component
Description, Lubrication Description, New Product Information and Drive Belt System
Description. Reviewing the description and operation information will help you determine the
correct symptom diagnostic procedure when a malfunction exists. Reviewing the description and
operation information will also help you determine if the condition described by the customer is
normal operation. Refer to Symptoms - Engine Mechanical in order to identify the correct
procedure for diagnosing the system and where the procedure is located.
SYMPTOMS - ENGINE MECHANICAL
Strategy Based Diagnostics
1. Perform the Diagnostic System Check - Vehicle before using the symptom tables, if
applicable.
2. Review the system operations in order to familiarize yourself with the system functions.
Refer to Disassembled Views, Engine Component Description, Lubrication
Description, New Product Information and Drive Belt System Description.
All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform
approach for repairing all systems. The diagnostic flow may always be used in order to resolve a
system problem. The diagnostic flow is the place to start when repairs are necessary. For a
detailed explanation, refer to Strategy Based Diagnosis .
Visual/Physical Inspection
Inspect for aftermarket devices which could affect the operation of the Engine. Refer to
Checking Aftermarket Accessories .
Inspect the easily accessible or visible system components for obvious damage or conditions
which could cause the symptom.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado