S10/T10 Blazer 4WD V6-262 4.3L (1989)
Refrigerant: Service and Repair
Vacuum System Check
VACUUM SYSTEM CHECK
Before connecting the vacuum pump to the system, run the pump connected to the low pressure gage to determine the vacuum pump capability. If the
vacuum system is unable to reach 711.2-736.6 mm (28 to 29 inches) or more vacuum, check for leaks. If no leaks are found, check the vacuum pump.
