1999 Yukon fuel pump connector plug

[Sailormilan2]

I think the fuel pump in my 1999 Yukon is going bad. I hear a whine and my gas gauge needle is doing the shimmy. I read a couple of posts that recommend only going with and AC Delco unit. However, when doing a search I see what appear to be 3 different types of pumps modules out there.
#1. Square electrical plug connector. AC Delco MU1777
#2. Retangular with rounded ends and requires cutting the old plug.
#3. Square fitting, with additional black connector on top. Possibly fuel vapor pressure sensor. AC Delco MU1746 (I think)
I really would like to have my pump on hand to do that job, rather than drop the tank and try to find the proper module.
Which module is proper for my vehicle, and does not involve cutting the old plug off?

Are the Bosch units decent if I can't locate an AC Delco?

 

[justimagination]

Call your local Chevy dealer parts dept, give them you VIN # and they can give you the correct GM part #. If they will not offer wholesale price, look for AC DELCO dealer in your area. They will be more than happy to help you, and if they don't have it in stock, they will order it for you. Good luck,
david g.

 

[Jounier11]

As far as i know who ever says "Ac Delco is the only way to go" is WRONG whyy?? because i went aftermarket and have not had 1 single problem with it, Now is your gas gauge dancing or is it vibrating (a hummingbird like effect)?

 

[Sailormilan2]

As far as i know who ever says "Ac Delco is the only way to go" is WRONG whyy?? because i went aftermarket and have not had 1 single problem with it, Now is your gas gauge dancing or is it vibrating (a hummingbird like effect)?

Yes it is doing the dance. I put some of the GM Fuel System cleaner in the tank, and the dancing is still there, but the needle movement is not as big as it was.
I called my local repair shop. Not a GM or Chevy. Th.ey gave me a price quote of $800 - $900 for pump R&R. Guy got kind of defensive and claimed the cost was so high because they only use GM factory oumos. Last time I checked at GM Parts Direct, pump cost was about $250. I can't believe it costs $500 plus to drop a tank that is only held in place by two bolts and straps.

 

[lesterl]

Held in place by to straps and bolts, rear axle, frame crossmember, 15 years of dirt, grease, and crap......

I like OEM pumps, I advise against aftermarket because EVERY one I have tried has failed WAAAAAYYYYYYYY too soon (some never worked at all and I aint doing all that work to have it crap out.)

Some have cut a hole in the floor below the rear drivers side seat to access it. Should have a 3 digit code on the pump module.

Most of the aftermarket pumps at the autoparts stores arent worth it....