Sometimes I leave my block heater plugged in after starting in order to help warm the vehicle up faster. It's only for a few minutes. I don't know if it really helps or not, but on those cold winter mornings, I like to have heat in the cab right away!
Of course, on a diesel, it takes longer for the engine to warm up anyway. Also, the block heater just keeps the engine barely warm, just enough to aid in starting.
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Project truck: '81 C/20 converted to 6.2L TURBO DIESEL bored .040", gear drive, 6.5L injectors/pump, custom pistons, custom 4" exhaust, 700R4, 4.10's
Daily Driver: '95 K1500 Tahoe, 6.5L TURBO DIESEL, NP241, 4L80E, 3.42's
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