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 MANUALSCHEVROLET1997ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSFUEL SYSTEM - INJECTION BALANCE TEST PROCEDURE REVISED
1997 Chevrolet Astro Van 2WD V6-4.3L VIN W
Fuel System - Injection Balance Test Procedure Revised
1997 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Fuel System - Injection Balance Test Procedure Revised
File In Section: 6E - Engine Fuel & Emission
Bulletin No.: 61-63-16
Date: February, 1997
SERVICE MANUAL UPDATE
Subject:
Section 6E - Engine Controls - Revised Injector Balance Test Procedure
Models:
1996-97 Chevrolet and GMC S/T, M/L, C/K, G, P Models
1996-97 Oldsmobile Bravada
with 4.3L, 5.0L, 5.7, 7.4L Engine
(VINs W, X, M, R, J - RPOs L35, LF6, L30, L31, L29)
This bulletin is being issued to inform technicians of a revision to the Injector Balance Test. This revised procedure will help the technician to use the Injector Balance Test with greater clarity and accuracy. Please use this revised procedure of the Injector Balance Test for the following model years:
^ 1996-97 S/T Truck V-6
^ 1996-97 M/L Van V-6
^ 1996-97 G Van, V-6, V-8
^ 1996-97 C/K Truck, V-6, V-8
^ 1996-97 P Truck, V-6, V-8
Technicians diagnosing vehicles with misfire DTCs (P0300-P0308) must perform the Injector Coil Test and the Injector Balance Test prior to injector replacement.
Bulletin No.: 61-63-16
Date: February, 1997
SERVICE MANUAL UPDATE
Subject:
Section 6E - Engine Controls - Revised Injector Balance Test Procedure
Models:
1996-97 Chevrolet and GMC S/T, M/L, C/K, G, P Models
1996-97 Oldsmobile Bravada
with 4.3L, 5.0L, 5.7, 7.4L Engine
(VINs W, X, M, R, J - RPOs L35, LF6, L30, L31, L29)
X�N :
This bulletin is being issued to inform technicians of a revision to the Injector Balance Test. This revised procedure will help the technician to use the Injector Balance Test with greater clarity and accuracy. Please use this revised procedure of the Injector Balance Test for the following model years:
^ 1996-97 S/T Truck V-6
^ 1996-97 M/L Van V-6
^ 1996-97 G Van, V-6, V-8
^ 1996-97 C/K Truck, V-6, V-8
^ 1996-97 P Truck, V-6, V-8
Technicians diagnosing vehicles with misfire DTCs (P0300-P0308) must perform the Injector Coil Test and the Injector Balance Test prior to injector replacement.
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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.