Question about 2003 GMC Sierra 2500HD

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I need to know how much oil and what kind of oil a 2003 GMC Sierra 2500HD takes I need to know how much transmission fluid and what kid a 2003 GMC Sierra 2500HD takes I need to know what size the washer fluid container is on a 2003 GMC Sierra 2500HD.

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  • mikehumble May 11, 2010

    gas or diesel

  • jduffey5 May 11, 2010

    what motor?

    automatic or manual trans

  • yadayada
    yadayada May 11, 2010

    What engine do you have? makes a difference.

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  • 366 Answers

Check owners manual,or call a gm service dep.

Posted on Feb 23, 2009

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1 Answer

I swapped out a 2003 4L80E transmission for a 19994L80E transmission that was running fine in my friends Suburban that was working fine whith no trouble but it will not engage now. Any suggestions?


they are different years 1999 is up to 2000/2001 then the 2003 is 2001 to 2004/5. auto box module works different, box's look the same but the sensors are different inside you would need to change the auto module and pair it to your ecu on your engine.

May 29, 2014 | 2003 GMC Sierra 2500HD

1 Answer

I need to know what kind of tranny fluid goes in a manual transmission on a 1989 gmc seirra with 305 its a stepside to. i put amsoil synthetic manual synchromesh transmission fluid in it but im worried...


Muncie 4 (117MM) speed---Lubricant Type---------80W-90 Gear Oil
Muncie 5LM60 (HM-290) 4 & 5 Speed ---------Lubricant Type------Syncromesh Trans Fluid T2850

Oil Capacity= 5 Speed (85mm & 109mm)--3.6 pt (US)
(New Venture Gear 4500)--8pt (US)

4 Speed= (85mm)--3.6pt (US)
(117mm)--8.4pt (US)


Hope this helped you ??

Jun 14, 2011 | 1989 GMC Sierra

3 Answers

2003 gmc sierra rear differential oil how much and what kind is recommended


85 or 90w will be fine, take the differental plug out and add fluid until it just does start to run out of check hole

Jan 14, 2011 | 2003 GMC Sierra 1500

1 Answer

Transmission Fluid Capacity?


I will assume you have already drained the trany. You could have measure the fuid out and replaced all but a quart. Estimate what you took out minus a quart and run the trany through all the gears. let is set and measure what you need. Even simpler, get the manual for the unit and look up maintenace.

Jun 20, 2010 | 2002 GMC Sierra 2500HD

1 Answer

I press my clutch and get no resistance and cant get into any gear? 2003 gmc sierra 8.1 4x4 2500hd 5 speed


Check fluid level in clutch master cylinder, if fluid is full then bleed clutch system.

If you still have no pedal resistance you will need a new master or slave cylinder for the clutch.

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Oct 30, 2009 | 2003 GMC Sierra 2500HD

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