Do not drive the truck until the issue is resolved.
1. Make sure the oil is at the proper level in the engine with the correct spec oil for the pickup. Oh it is normal for the oil pressure to be a little low at idle and go up to the normal range as the engine rpm goes up to normal operating range.
2. It could be either a real problem or a problem with the oil pressure indicator. To verify which connect a mechanical test pressure gauge of the proper range say a 0-100 psig scale to the point where the oil pressure sensor is connected. After it is connected test run the engine for a short period. If the pressure shows normal replace the oil pressure sensor. If the gauge confirms the low oil pressure then you have a serious issue in the engine. It could be:
1. Bad oil pump or oil pressure relief valve
2. excessive clearance in the bearings due to high miles.
SOURCE: ticking noise and low oil pressure
DOES IT HAVE A LOT OF MILES ON IT OR MAY BE THE OIL PUMP IS IS GOING OUT? THERE IS A SPRING IN THE PUMP THAT IS A BYPASS FOR HOW HIGH PSI IT MAY HAVE BROKE THAT WILL GIVE YOU LOW PSI.
SOURCE: thermostat location 2001 chevy silverado 1500
The thermostat is in the hose on the passener side of the waterpump.It is in the part that has the three 10mm bolts.Please rate my answer, Thank you.
SOURCE: 1993 Chevy Silverado truck headlights high beam only works no low
dimmer switch has gone bad need to change your dimmerswitch
SOURCE: Need to find Low Pressure A?C Port 2001 Impala 3.8
The low pressure port is against the fire wall, look straight back and you will see it.
Greg
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