i have 1999 5.3 L. silverado.at startup oil pressure at 40 psi.when temp.gets to normal pressure drops to around 20psi. lifters start to tap. i pull over and turn engine off. 5 min. later start engin

Asked by May 05, 2014 at 12:02 PM about the 1999 Chevrolet Silverado 1500

Question type: Maintenance & Repair

1 Answer

78,065

I had a couple of engines do this too me also, 1 had a bad oil pump, the other had not been serviced properly and crud was plugging up the oil passages to the top end, and the 3rd was the cam bearings excessive clearance. Yours sounds like an oil pump failure.

Your Answer

Add photo

Related Questions

  • OIl pressure still drops after changing oil sending unit? 84 answers

    When truck is first started, oil pressure is normal, around 40 psi. When engine temp starts up, oil pressure slowly falls until "Stop Engine - Low Oil Pressure" warning comes on. Switch truck off a fe...

    2009 Chevrolet Silverado 1500 LTZ Crew Cab 4WD

    -

    Maintenance & Repair

  • my oil pressure gauge drops to 0 while driving 57 answers

    While driving my oil pressure gauge randomly drops down to 0. I have to pull over and shut off my truck for a minute or so and restart it. The gauge goes up a little or some times back to normal. How...

    2003 Chevrolet Silverado 1500 Ext Cab Short Bed 4WD

    -

    Maintenance & Repair

  • 01 Chevy Silverado oil pressure 6 answers

    My oil pressure is at zero on start spikes to 20psi holds there while driving then drops you can here valves lifters tapping at zero before all this I changed the oil sending unit as it was leakin...

    2001 Chevrolet Silverado 1500 Base Long Bed 4WD

    -

    Maintenance & Repair

  • gauge shows oil pressure dropping 7 answers

    40lbs at startup and 55lbs at 1700 rpm. After about 45 mins of driving, bells start with warning message on dash, "low engine oil pressure", but no check engine light. Stop and turn off the truck, c...

    2004 Chevrolet Silverado 1500 LS Ext Cab Short Bed 4WD

    -

    Maintenance & Repair

  • 2005 Avalanche 5.3 lifter tap 6 answers

    I have a 2005 Avalanche with a 5.3, I have 200000 miles and have used Mobil 1 oil since the first oil change changing it at no more than 5000. Starting at about 198000 I started to hear the valve ...

    2005 Chevrolet Avalanche 1500 LS

    -

    Maintenance & Repair

Search Chevrolet Silverado 1500 Questions

Chevrolet Silverado 1500 Experts

#1 John Carson
John Carson
Reputation 1,650
#2 Silverado_owner_2006
Silverado_owner_2006
Reputation 1,440
#3 tenspeed
tenspeed
Reputation 1,350
View All

Related Models For Sale

Used GMC Sierra 1500
1,084 Great Deals out of 56,547 listings starting at $1,600
Used Ford F-150
3,133 Great Deals out of 200,441 listings starting at $1,273
Used Dodge Ram 1500
485 Great Deals out of 11,746 listings starting at $1,795
Used Toyota Tundra
624 Great Deals out of 27,414 listings starting at $1,599
Used Chevrolet Tahoe
997 Great Deals out of 30,889 listings starting at $1,495
Used Toyota Tacoma
712 Great Deals out of 32,032 listings starting at $2,995
Used Ford F-250 Super Duty
451 Great Deals out of 41,607 listings starting at $2,850
Used Chevrolet Camaro
621 Great Deals out of 38,657 listings starting at $2,995
Used Chevrolet Silverado 2500
5 Great Deals out of 213 listings starting at $4,500
Used Dodge Ram 2500
172 Great Deals out of 5,239 listings starting at $2,395

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
31 Great Deals out of 77,995 listings starting at $19,398
2016 Chevrolet Silverado 1500 For Sale
320 Great Deals out of 17,526 listings starting at $18,657
2015 Chevrolet Silverado 1500 For Sale
340 Great Deals out of 7,453 listings starting at $16,000
2014 Chevrolet Silverado 1500 For Sale
451 Great Deals out of 10,924 listings starting at $10,990
2013 Chevrolet Silverado 1500 For Sale
270 Great Deals out of 6,436 listings starting at $9,950