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How to replace oil pump in 03' GMC sierra 2500HD 4x4 6.0 gas engine

Besides Pump, oil and gasket what else do I need?

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Don't forget to disable the engine and crank it till you have oil pressure it only takes running it a minute without pressure to destroy the rod and main bearings be sure to use the correct oil when changing the pump consult a service manual Industry practice was to use assembly lube to prime the oil pumps on installation but with the use of more and more aluminum and lighter oils some engines manufacturers do not recommend priming the pump this way i suggest immerse the oil pickup tube in clean oil and spin the pump shaft till you draw oil to the top of the pump

Posted on Dec 11, 2012


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Posted on Jan 02, 2017

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SOURCE: 1997 gmc sierra p/u 5.0l 2wd needs fuel pump

NO dont drop tank, you will be sorry, take bed off, only like 6 or 8 bolts, and you will have more room to work, and its a pain in the *** to undo the lines and drop the tank, you cant get in there to do it, but just basic tools nothing special, be sure and try not to make any sparks while takein off that ring to get the pump out, and put an ac delco pump on there

Posted on Feb 11, 2009

  • 10 Answers

SOURCE: fuel pump fuse located on 1997 gmc sierra

The fuse is actually a Relay Switch and its located in the Fuse Relay Center on the driverside of the engine compartment. The Black Box is labled Fuse Relay Center, the diagram on the cap displays which Relay is the Fuel Pump relay...the Relay switch is usually $8-$15 depending on where you shop

Posted on Jul 28, 2009

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SOURCE: how to replace a water pump on a 5.3 liter sierra

I suggest that you visit the website and register the vehicle. It doesn't cost anything and will give you access to an online repair manual. The steps for replacing the water pump should be available there. Hope this helped and best wishes.

Posted on Aug 31, 2009

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SOURCE: replacement of water pump on 2004 gmc sierra

Remove or disconnect the following:

Air outlet duct Coolant Inlet radiator hose from the water pump Upper fan shroud Cooling fan and clutch assembly Drive belt Radiator outlet hose from the coolant pump Surge tank hose Heater hose Water pump


DO NOT use cooling system seal tabs (or similar compounds) unless otherwise instructed. The use of cooling system seal tabs (or similar compounds) may restrict coolant flow through the passages of the cooling system or the engine components. Restricted coolant flow may cause engine overheating and/or damage to the cooling system or the engine components/assembly.

Install or connect the following:

Water pump. Install the water pump bolts. Tighten the water pump bolts first pass to 11 ft. lbs. (15 Nm); tighten the bolts final pass to 22 ft. lbs. (30 Nm). Water pump drive belt pulley and bolts (if applicable). Tighten the pulley bolts first pass to 89 inch lbs. (10 Nm); tighten the bolts final pass to 18 ft. lbs. (25 Nm). Surge tank hose Heater hose Outlet radiator hose to the coolant pump Drive belt Cooling fan and clutch assembly Upper fan shroud Inlet radiator hose to the water pump Air inlet duct Coolant

Posted on Jan 15, 2010

  • 431 Answers


have it tested using a manual gage if still low then main baring ore most likely bad that would mean a over hall if is really low and bearings bad should be making rattle noise when started up first few seconds

Posted on Mar 11, 2010

Testimonial: "thanks alot.truck is not making a rattling noise.we did check it with a manual read about 10 at idol. press. gets better as you incr speed"

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I'm thinking of buying a 2002 2500HD duramax 4x4.

good trucks, but they've been known to give trouble.( injector pumps, fuel filter housings, etc.) the injector pump alone runs around $1500.00, without labor. fuel pump housing,$150.00,and so on. and pray the turbo doesn't go out! my sugestion? buy a gas rig with a 350 that has maintainence records and about 125.000 to 150.000 miles. it will last you a good long time.

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Cannot pump gas into tank. the safety mechanism on gas pump keeps shutting off. I do have a check engine light for a small emissions leak.

you need to replace the vent purge solenoid. this is what vents the air out of the fuel tank when you fill up and what is causing your code. it is available at your dealer, and is a fairly common issue. good luck!

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My 2003 gmc 2500hd will not start. the battery is

check that the oil level is full and check to see if the low oil pressure switch has fallen off it's between the engine and firewall just below the distributor, als tun the ingtion key on and listen to see if you here the fuel pump come on for two seconds, if it does check fuel filter. if it does not check fuel pump relay and blowout prevention valve reset it if it's not allowing fuel to flow will bwe on same side of fill hose tank.

Apr 11, 2010 | 2003 GMC Sierra 2500HD

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Mar 30, 2010 | 2001 GMC Sierra 2500HD

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Feb 07, 2010 | 2002 GMC Sierra 2500HD

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2003 gmc seirra sle 2500hd 4x4 ext'd cab duramax diesel allison a/t #1 heater fan operates on hi w/switch on hi when engine is started, but will not in most cases when adjusted after engine is running???...

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Dec 30, 2009 | 2003 GMC Sierra

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How to remove a 2003 GMC Sierra water pump

I personaly dont see many water pump gaskets leak, but instead there is a weep hole that they leak from when they wear out. they are designed this way. which is common. reason it may leak with ignition off is now the pressure builds up verses being cycled through the engine and doesnt reall have time to squirt out.and it just finds a way out with engine off which would be your weep hole most likely.

Its not hard to fix or replace water pumps on the gas engines. there should be the large A/C and powersteering bracket that can be removed and sometimes if you dont have clearence the alternater bracket. its not very hard. basic tools work just fine. the only thing that may be alittle hard is the fan nut. you will need a large wrench and something to stop the pully from spining while loosening and tightening that nut. should take about 2 hours or so. IIRC13mmm, 15mm bolts, 9/16 bolts and 10mm and 8mm bolts. that all you need.other than the large wrench. pipe wrench will work but you need something to prevent the pulley from movning. thats very important.

Good luck. I hope i answered your question.

Apr 29, 2009 | 2003 GMC Sierra 2500HD

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