07 gmc 5.3 oil pressure issue

snowcannon

Active VIP Member
Joined
Oct 29, 2015
Messages
419
Reaction score
694
Location
Salmon Arm
Truck is a 07 GMC 5.3 new body style. Noticed oil pressure gauge at 275 (kpa?) yesterday. Today while driving it was at max (500) and check-engine-light on. Then dropped and stayed at 0. Pulled over on the next parking lot, shut off engine and let it sit for a while. Started up again and still at 0 with engine light on. Popped the hood, but didn't see anything and engine sounded normal as well. Does this sound like the sending unit is shot or do I need to look for an engine? Need to go to work tomorrow, but scared to drive and blow up the engine...
 

tex78

Active VIP Member
Joined
Feb 5, 2010
Messages
17,295
Reaction score
16,096
Location
DA Moose B.C
Truck is a 07 GMC 5.3 new body style. Noticed oil pressure gauge at 275 (kpa?) yesterday. Today while driving it was at max (500) and check-engine-light on. Then dropped and stayed at 0. Pulled over on the next parking lot, shut off engine and let it sit for a while. Started up again and still at 0 with engine light on. Popped the hood, but didn't see anything and engine sounded normal as well. Does this sound like the sending unit is shot or do I need to look for an engine? Need to go to work tomorrow, but scared to drive and blow up the engine...
Well depending on which engine version it is, first place to start is replacing the valve oil lifter filter and oil psi sensor

It's under the sensor

I assume the oils full and clean??
 

tex78

Active VIP Member
Joined
Feb 5, 2010
Messages
17,295
Reaction score
16,096
Location
DA Moose B.C
I can do it for ya at the g. M dealer in salmon arm if ya need, make sure ya ask for me to do it
 

snowcannon

Active VIP Member
Joined
Oct 29, 2015
Messages
419
Reaction score
694
Location
Salmon Arm
Thanks for replying tex. Oil is good. Was changed recently. I will do some research on the replacement of the filter and sensor.
If it's too complicated, I may have to visit the gm dealer. My biggest worry right now is whether I can drive the truck to work without a (real) oil pressure reading.
 

tex78

Active VIP Member
Joined
Feb 5, 2010
Messages
17,295
Reaction score
16,096
Location
DA Moose B.C
Thanks for replying tex. Oil is good. Was changed recently. I will do some research on the replacement of the filter and sensor.
If it's too complicated, I may have to visit the gm dealer. My biggest worry right now is whether I can drive the truck to work without a (real) oil pressure reading.
It's a common ish thing, problem is your never 100% sure if there's oil psi or not

Also the wrong oil filter can cause issues too
 

Quicksand

Active VIP Member
Joined
Mar 14, 2011
Messages
636
Reaction score
1,405
Location
Eagle Hill
If you drove it more than a couple minutes with the gauge reading 0 and it didn't seize solid, it still has oil pressure and it'd be fine to drive.
 

snowcannon

Active VIP Member
Joined
Oct 29, 2015
Messages
419
Reaction score
694
Location
Salmon Arm
Thanks for the replies guys. Will start up truck and if there are no horrible sounds I will drive to work. Don't have much of a choice.
 
Top Bottom