I have a 2000 Chevy Silverado 4.8 engine. When I pull my RV my oil pressure drops to zero after about 40 miles?

Asked by Sep 05, 2015 at 11:14 PM about the 2000 Chevrolet Silverado 1500

Question type: Maintenance & Repair

When not pulling anything the oil pressure runs 50
to 60.  The engine was running about 3000 rpm
uphill and engine temp is 210 pressure starts
dropping slowly when it gets under 40 it starts
dropping fast.  Take the load off engine and let
cool down oil pressure goes back up.

8 Answers

19,225

first try and change the oil/filter..go up 10 in weight or try 20-50....!

1 out of 1 people think this is helpful.
1,945

kelly is right you are probably running a 5w30 or a 10w30 oil and it is not enough depending on the mileage of the motor. like kelly said I would got up 10 in weight and if you are already running 20w50 your pump is failing on you and might need to be replaced. when ever you change your oil I would use lucas oil additive. and if you are using 20w50 oil and your going to change pumps I reccomend a hi volume pump.

78,065

An oil pump is the most common failure. But be aware that sometimes a flaw in the engine block can also cause this same problem, the pressure will be fine under normal everyday driving but when a higher loads than normal are meet the flaw opens up due to increased heat and the oil pressure drops. So if the problem is still there after you replaced the oil pump then you know what is next.

80

I agree with the oil change and the pump and would go a step or two further. How often are you pulling something? If it's a lot, consider adding a oil cooler. The other problem it could be is that you have some burned main baring's. Knowing how many miles on the motor and the size of the rig you're pulling can help us with your problem diagnosis.

The engine has 187000 miles on it, I usually run 10w30 in it the last time I got it changed the oil place put 5w30 in it I had the same Problem went and changed the oil myself to 10w30 and had the oil changed after about 800 miles to 10w40 high mileage. I pull a 24 foot bumper pull RV. I do not pull it much maby 2 or three times a year.

11,385

Check and maybe replace your oil sensor. Those have been known to go bad after a while. Very common problem. Gives strange readings. Other hat adding heavier oil, it is the next cheapest way to check and or replace. There are external oil coolers that can be added to tow vehicles, both for the engine and transmission. Look into those. I would recommend changing to a 20-50 oil in the warm months, and 10-40 for winter.

80

I agree with the sensor replacement; I have had that happen in one of my vehicles before. Have you ever run a compression check on your motor? With 187K on it, it should be ok, but you never know; a compression check is a very inexpensive check to tell you the internal health of your motor.

1 out of 1 people think this is helpful.
20

When I pulled my boat to the lake, I always ran 30W in the summer and changed in the winter to 10W40. Old engines don't have the tight tolerances they once use to. That's a lot miles and it wont hold new engine pressures, they always drop off when it gets hot.

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

  • 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

  • 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

  • How do you know if the oil pressure gauge is bad? 21 answers

    I have a 2003 Chevy Silverado that has low oil pressure what do I look for

    2003 Chevrolet Silverado 1500 LT Ext Cab Long Bed 2WD

    -

    Maintenance & Repair

  • Oil pressure drops to zero at idle 5 answers

    When the truck is idling it Has no oil pressure and the check gauge light comes on but when I raise the rpms it goes back to 40 I rebuilt the engine 650 miles ago and it has a new oil pump could ...

    2001 Dodge Ram 1500 4 Dr SLT 4WD Quad Cab LB

    -

    Maintenance & Repair

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 145,717 nationwide Silverado 1500 listings starting at $1,800.

ZIP:

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
1,085 Great Deals out of 56,553 listings starting at $1,600
Used Ford F-150
3,136 Great Deals out of 200,446 listings starting at $1,273
Used Dodge Ram 1500
484 Great Deals out of 11,746 listings starting at $1,795
Used Chevrolet Silverado 2500HD
404 Great Deals out of 28,247 listings starting at $2,900
Used Toyota Tundra
625 Great Deals out of 27,422 listings starting at $1,599
Used Chevrolet Tahoe
995 Great Deals out of 30,888 listings starting at $1,495
Used Toyota Tacoma
713 Great Deals out of 32,028 listings starting at $2,995
Used Ford F-250 Super Duty
450 Great Deals out of 41,609 listings starting at $2,850
Used Chevrolet Camaro
621 Great Deals out of 38,658 listings starting at $2,995
Used Chevrolet Silverado 1500HD
10 Great Deals out of 259 listings starting at $4,700
Used Chevrolet Silverado 2500
5 Great Deals out of 213 listings starting at $4,500
Used GMC Sierra 2500HD
134 Great Deals out of 13,438 listings starting at $3,895
Used Dodge Ram 2500
173 Great Deals out of 5,237 listings starting at $2,395

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
31 Great Deals out of 77,998 listings starting at $19,398
2016 Chevrolet Silverado 1500 For Sale
320 Great Deals out of 17,528 listings starting at $18,657
2015 Chevrolet Silverado 1500 For Sale
339 Great Deals out of 7,453 listings starting at $16,000
2014 Chevrolet Silverado 1500 For Sale
451 Great Deals out of 10,925 listings starting at $10,990
2013 Chevrolet Silverado 1500 For Sale
268 Great Deals out of 6,435 listings starting at $9,950