Question about 1999 GMC Sierra

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My 99 gmc 5.7 vortec got turned when the distributer was out now the oil pump shaft wont line up to put the distributer wont line up .. whats the best way to line everything back up and get the timin

The crank was turned when the distributer was out ... now the oil pump shaft wont line up with distributer,, how do I get everything to line back up and still get the timing right...???????

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You need to bring #1 piston up to the top. Then be sure your rotor on the dist. is pointing to number one in the firing order on the cap and before you put the dist on the oil pump shaft turn the oil pump shaft with a ***** driver so it aligns in the same direction as the rotor and set the dist into the oil pump shaft. Be sure to double check the rotor and be sure it is point to number one in the dist cap if not the engine will back fire and not start.

Posted on Apr 09, 2016

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If the Pontiac engine is similar to the small block Chevy, you have, I believe, a hexagonal shaft that runs from the end of the distributor shaft down to the oil pump. This is turned when the distributor shaft is turned by the meshing gears on the camshaft and distributor shaft. I would say that you are probably going to have to re-time the engine. Find TDC, then replace the distributor. It won't matter a whit to the oil pump if the gears are one or two teeth off, but it will matter a great deal if you distributor is not installed so it can be adjusted a few degrees when you get to "fine timing" the engine.

You should be able to download information on how to time the engine (finding TDC, etc.). Failing that, a trip to the library may be in order.

Posted on Apr 15, 2014

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Posted on Jan 02, 2017

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SOURCE: 1998 GMC Jimmy Vortec V6 4.3L 4WD
hope this helps

Posted on Oct 17, 2008

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SOURCE: My 99 GMC sonoma wont start..

ok... there are a couple of things you can do. i must have miss typed on the cap,rotor . in the back of the motor where the plug wires conect that is the cap that is bolted to the distributor with two torques bits that i believe are t15 in size. there may lie your problem. the posts inside are made of aluminum and they get coroded and dont alow the proper spark. the other commen problem is the exhaust the catalitic converter becomes pluged up. something you can try is remove one of the oxigen sensors and try to start it up if it runs the cat needs replaced. the o2 sensor is a 7/8 nut to remove it. give it a try

Posted on Jan 25, 2009

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SOURCE: 1998 GMC Sierra- runs rough then stalls when

had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!

Posted on Jun 06, 2009

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SOURCE: What is a Vortec engine?

The "spider" injector is the problem. You're right that one of the injectors is stuck open, unfortunately it has to be replaced as an assembly. This a common problem on the Vortec V-6's. When you were checking the fuel pressure, the fuel was passing through the open injector, giving you a low reading. After replacing the injector assembly, be sure to change your oil before you start the engine. I'd be willing to be you have a pint or two of gasoline that has gotten into the crankcase. That injector unit will cost you around $350. It's not too hard to put in, just be careful.

Posted on Feb 20, 2010

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SOURCE: what is the best type of motor oil for 2004 GMC

this engine calls for any major brand 5W20W (I prefer Valvoline), in very hot climates u can use 10W30W, but no heavier.

Posted on Jun 04, 2010

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2 Answers

Vortec oil pump on a gmc jimmy

Don't start the car !!!

Can you see the part from the whole where the distributor goes ?
If you can you may be able to fish it out.
Your distributor has a drive shaft that goes from the dist to the oil pump in the oilpan.
Hopefully it is sitting on top of the shaft.
Their are know oil lines at the bottom of you engine, everything is internal.
If you cant fish them out from the top, the oilpan will have to be removed.
I think your best bet is to try to remove the pieces from the dist hole with a magnet on a shaft or maybe very sticky tape on a shaft.
Good luck, Robert

May 05, 2017 | 1999 GMC Jimmy

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I have a 4WD 1998 GMC Jimmy 4.3L Vortec V6 and it started running hot then it shut off and wouldn't start back up... do you think there would be any way to fix without replacing the whole engine


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Buddy took out the whole distributer.How to put it back in place properly?Also what is the firing order looking from front of motor?

if it is a v8 the firing order is 1-8-4-3-6-5-7-2. looking at front of engine 1,3,5,and 7 are on right,2,4,6,8 on left. You must crank engine by bumping starter with finger over no. 1 plug hole until compression stroke is felt. Look at timing marks on crank shaft and turn to exact top dead center. Number 1 is usually the front tower on the distributor cap so you must get the distributor in block with the rotor pointed to this tower. It takes a few trys so don't give up. You may need to use a long screw driver to turn the oil pump shaft to match the tab on end of distributor shaft.

air will blow finger off the hole.

Aug 08, 2011 | GMC Sierra Cars & Trucks

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Could be steering shaft on bottom of column that connects column to gearbox. Rag joint or u-joints on shaft are dry or seized. Try spraying rubber rag joint & u-joints on steering shaft with a good penetrating oil like PB Blaster. Work steering wheel all the way to left,spray, then turn all the way to right & spray some more.

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1997 gmc 5.7l vortec=will not start below -30f

to verify the compression in every cylinder for which if you have no compression it does not start you. If you have compression, spark, gasoline. it must start

Jan 04, 2010 | 1997 GMC Sierra K2500

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1987 El Camino pulled the distributer out to fix now it won't go back into the crank shaft tried turning oil pump shaft but still won't go been screwing with it for hours help sanity is slipping away!!

Ok Get a grip! get a flrash light and peer down the distriputor shaft hole look at the oil pump shaft, if it has a -- type shaft do the following. Remove the distributor cap mark #1 on the distributor housing turn to the number one postion and look at the shaft on the distributor by raiseing it above your head notice what positon it is at 1 oclcok 6 oclock or what ever the postion, now go back tothe block and turn the shaft in that direction so it lines up then turn the oil pump shaft 1 tooth or 1/8 inch oppisete direction gears spins. then place the distributor down in the hole not moving it from it's postion then lower it into the engine and turn it 1/8 inch counter clockwise as it drops allow the rotor to turn freely if it does not drop down turn the distributer one more tooth by raising it up so you can feel the teeth move one tooh then drop again you may have to wigle the distributor rotor shaft to get it to fall in. hope this helps. and have a six pack and walk away for an hour and try again.

Oct 17, 2009 | 1987 Chevrolet El Camino

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1997 gmc sierra 4.3l new fuel pump and wont start

I have 1993 gmc 4.3 vortec v6 turns over but want start. replaced fuel pump, fuel pump regulator ,ecm, tps, coil

Oct 16, 2009 | 1993 GMC Sierra K1500

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99 gmc wont start

check electric fuel pump operation ( located in the fuel tank ). Occasionally a fuel pump will burn out when running out of fuel, due to the fact the pump runs DRY for about 30 seconds till the fuel stops flowing out of the injectors, the engine quits, simultainously losing oil pressure which FINALLY shuts off the fuel pump. Sometimes TOO LATE. Hope this helps

May 01, 2009 | 1999 GMC Suburban

2 Answers

I replaced the distributer after it jumped out of the oil pump while it was running. To be able to get it stabed back in i had to advance it 2 teeth and now for it to run i have the timming advanced as far...

Move the distributor one tooth at a time. Usually the oil pump shaft will follow it if you only more one at at time. If you set the engine at tdc, there is a mark on the distributor that you line up that is stamped with a 8 or 6 depending on what engine you have. That will get you close, to get it set perfect, you will need to hook it to a scanner. Turning the distributor doesn't actually set the timing anymore. It sets your camshaft sensor offset, and to need the scanner to read that. If you get it close it will work, but if you have it to far off, the check engine light will be on for cam/crank correlation code.

Mar 05, 2009 | 1998 GMC Sierra

1 Answer


This works on chevy's,I don't know about fords.Take a long screwdriver, with a flashlight, if there is enough room, guide the screwdriver in the distributor hole, there should be slot on the top of the oil pump shaft, stick screwdriver in slot and turn oil pump shaft until it lines up with the distributor shaft of the position you want it in.

Jan 27, 2009 | 1987 Ford Ranger

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