C 10 1/2 Ton Pickup 2WD V8-379 6.2L DSL VIN C FI (1982)
Compression Check: Specifications
1896 kPa (275 psi) minimum at 200 rpm
The lowest reading cylinder should not be less than 70% of the highest.
Perform compression test with engine at normal operating temperature, glow plugs removed and throttle wide open.