K 2500 Truck 4WD V8-379 6.2L DSL VIN J FI (1992)
to amount column travels down to obtain total PSI/Vacuum.
Example:
One-half inch above zero plus one-half inch below zero equals one inch vacuum reading.
1/2" + 1/2" = 1"
Chevrolet Workshop Service and Repair Manuals
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