Oil pressure gauge goes from maxed out to 0
08-11-2013, 12:20 PM
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Oil pressure gauge goes from maxed out to 0 This is for my 2003 silverado 4.8 and NOT an ls1 but they should be pretty much the same.
My oil pressure gauge pegged out one day and I figured it was the sending unit because it was just like how I broke mine on the camaro after the ls6 intake, so I thought it was just the sending unit. Then one day I noticed if I give it slightly more gas and bring the rpms up to about 3k or more it will suddenly drop to 0. Nothing will change or act differently, and after about 30 seconds or less it will go back to maxed out.
I also noticed that when I'm at highway speeds and I turn on cruise control, everytime I push the button to increase speed it will drop or increase depending on where it's at before hand. Meaning if I push the button to increase speed multiple times quickly it will bounce back and fourth rapidly.
So these now lead me to believe its not my sending unit. I'm pretty clueless about this, any help??
My oil pressure gauge pegged out one day and I figured it was the sending unit because it was just like how I broke mine on the camaro after the ls6 intake, so I thought it was just the sending unit. Then one day I noticed if I give it slightly more gas and bring the rpms up to about 3k or more it will suddenly drop to 0. Nothing will change or act differently, and after about 30 seconds or less it will go back to maxed out.
I also noticed that when I'm at highway speeds and I turn on cruise control, everytime I push the button to increase speed it will drop or increase depending on where it's at before hand. Meaning if I push the button to increase speed multiple times quickly it will bounce back and fourth rapidly.
So these now lead me to believe its not my sending unit. I'm pretty clueless about this, any help??
08-11-2013, 06:54 PM
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08-11-2013, 08:40 PM
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lol the battery is somewhat new though. 6 months or so. I would think if it was the sending unit it would ONLY peg out and not jump back and fourth tho... I don't know could be wrong lolLol I wouldn't think they'd use too much Mexico made stuff on the truck, says it was assembled in I think it's Ohio? Not 100% but pretty sure. Got the sticker on my door lol parts coulda been imported tho. But yea, I'd say these years are kind of a dark age in GMs quality
08-12-2013, 10:34 PM
#7
On The Tree
It is a pain in the neck, but the sending unit can be replaced with the manifold still on. Just need the special socket, a good sense of touch, and cram your arm under the cowl.
