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Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

6.5 LIFT PUMP

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Old 04-09-2013, 08:56 PM
kylek's Avatar
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Default 6.5 LIFT PUMP
my lift pump is not truning on to i trun my truck off???? i just put a new acdelco lp and ops on it so i know there not bad i dont get it
 
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Old 04-10-2013, 11:50 AM
racer55's Avatar
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The LP should activate when the key is turned to start position,and then again when the engine is running.

The OPS has 24/7 power so it is normal to hear the LP run after the engine is shut down until oil pressure bleeds off.
 
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