Question about 1985 GMC Suburban

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What type of oil works best in a 1985 GMC suburban 1500 diesel

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Factory recommendation would be 7 quarts (including your filter) 15W-40. i hope this helps!

Posted on Sep 30, 2009

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I use a 15W40 for diesel engines year round in my 1982 6.2 and in my 1994 International without any problems. Hope this helps.

Posted on Sep 30, 2009

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I bought a 1985 gmc suburban 6.2 diesel and the power windows do not work but i have power to the locks and they work.


I'm pretty sure the locks and windows are on two different circuits.
A mechanic would check the drivers door master switch for power and ground first.

Jul 25, 2012 | GMC Suburban Cars & Trucks

1 Answer

Problem for GMC 1998 Suburban DIESEL DIES while


Its called the fuel pump cylinoide which is attached to the fuel pump. Unless the fuel pump is bad, you got an expensive part to buy around $2500 or the cylinoide is $900 whichever is broken. This is a know issue for GMC deisel suburbans 6.5.

May 12, 2010 | 1998 GMC Suburban

1 Answer

How do I replace the universal joints on my 1999 GMC Suburban 1500 2WD?


Your best bet, is to pull the drive shafts and take it to a driveline specialty shop. That way they can straighten it and balance it ,as well as replace the joints.

Apr 16, 2010 | 1999 GMC Suburban

1 Answer

Gmc suburban 1500 4 wheel drive 1994 is sending a


code 28 is transmission range pressure switch, check the fluid level and get back to me, hope this helps. Please rate my fix as i strive to be the best Thanks Ray

Dec 10, 2009 | 1994 GMC Suburban

1 Answer

How to get access to a heater core for a 1985 GMC suburban K2500 350CID


This was the procces on an 86 chev 1/2 ton. Should be the same. Remove glove box. Undo manual controls for duct work. you'll see them there behind where the glove box was on top of the heater core housing. Bemove screws/bolts. Don't remember how many there are. Undo hose clamps in the engine compartment. Remove heater core.

Oct 09, 2009 | 1985 GMC Suburban

1 Answer

Help...94 Suburban 1500 auto 4x4, I am changing


I'm pretty sure GM built your truck with the diesel engine as an option so there is a way to make this work. The trans shifts are based on a combination of ground speed and engine RPM so as long as the computer is able to get these signals your trans should work. I put an early 90's overdrive in a mid 80's truck and didn't plug the wiring in because the trans used a 4 wire plugin and my truck only had a 3 wire. It worked fine, even overdrive.
A little jury rigging and ingenuity should find a way to attach your current kickdown cable to the accellerator on the diesel pump. GM probably has a bracket to make it fit. Check with the parts guys at the counter. Hope this helps.

Oct 03, 2009 | 1999 GMC Suburban

2 Answers

85 GMC Suburban sitting for 18 years


Sounds like you have a handle on it dont start it til you get that old diesel out of the tank, I would definitly change the oil. The only thing about it sitting that long is the seal deterioating rust I would run it with some lucas oil stabilizer

Aug 15, 2009 | 1985 GMC Suburban

1 Answer

How to reset the change oil light on a 2003 chevy silverado


Information courtesy of synthetic-direct.ca
Chevrolet Suburban/GMC Yukon XL, 2000-05 Chevrolet GMC Trucks Silverado, Sierra, 1999-05 Chevrolet Venture 2000
Turn the ignition key to the RUN position. Fully push and release the accelerator pedal 3 times within 5 seconds. If the CHANGE OIL SOON light flashes 2 times, the system is reset. However if the light comes on and stays on for 5 seconds, the system did not reset. Repeat the procedure if the system does not reset.
Best of luck.
Greg

Jul 15, 2009 | 2003 Chevrolet Silverado 1500

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