Question about GMC C3500

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Need vacuum line schematic for, 1979 454 gmc 3500

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2 Answers

I need a guide to see how all the vacuum line's go on my 78 GMC 3500 sbc 350


Best I could could come up with given the age. Hope this helps
need-guide-see-all-vacuum-lines-go-78-h5xihcvbzbeql2teoh05eujj-3-0.gif

Jul 04, 2015 | GMC Cars & Trucks

1 Answer

1996 GMC Sonoma


you need a wiring schematic from the auto parts store or dealer service to check the cold-run circuits..see if maybe a solenoid is disconnected or not working..also recheck your vacuum lines

Apr 11, 2014 | 1996 GMC Sonoma

1 Answer

Need wiring schematic for starting system on 96 gmc 3500 hd.6.5


autozone manual...$20.00...All specs and diagrams on your truck....

Aug 22, 2012 | GMC C3500 Cars & Trucks

1 Answer

Have 2000 gmc savana 3500 lags off the line had injectors cleaned no hjelp also will not start unless mid to premioum gas in tank


remove the vacuum line at the pressure regulator and start it up see if fuel drips out of the nipple if so the regulator is bad

Jul 07, 2012 | Cars & Trucks

2 Answers

I have a 1999 gmc 3500 crew dually with a 454 engine in it. This week it started running rough and idling funnny. Could this be the fuel filter or something else?


The fuel filter may need to be replaced, but wont fix the problem you have. Its just a maintenance item that should be done every 15k miles anyhow. Check it over, check the large hose between the air filter and the engine make sure its secure. see if all hoses are ok, if you see/hear a vacuum leak. If all looks ok, time to have it checked by a shop.

Sep 01, 2011 | 1999 GMC Sierra 3500

1 Answer

1999gmcjimmy diagram for vacuum hose


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Engine vacuum schematic-1994 4.3L (VIN Z) engines, California models with a M/T (Code TDK)


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Engine vacuum schematic-1994 4.3L (VIN Z) engines, California models with M/T (Code TLM)


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Engine vacuum schematic-1994 4.3L (VIN Z) engines, California models (Code TFL)


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Engine vacuum schematic-1994 4.3L (VIN Z) engines (Code TFN)


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Engine vacuum schematic-1994 4.3L (VIN Z) engines, California models with M/T (Code TCY)


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Engine vacuum schematic-1994 4.3L (VIN Z) engines (Code TCU)


Hope helps, keep us updated and remember to rate this answer.








Aug 10, 2011 | 1998 GMC Jimmy

1 Answer

I need to know the diagram for the vacuum lines for a 99 sanoma 4+4 w/4.3


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Fig. 31: Engine vacuum schematic-1996-99 4.3L engines (click over pic for zoom)

Hope helps (remember to rate this answer).

Apr 06, 2011 | 1999 GMC Sonoma

1 Answer

Need 95 gmc jimmy vacuum diagram. I have a loose


THat goes to your map sensor. If you look very closely under your hood there will be a vac line diagram there

May 09, 2010 | 1995 GMC Jimmy

1 Answer

I need rearend stamatics for a 1993 GMC 3500. Can anyone help me find the stamatics?


Schematics for these rear axles are many. I will need the axle code to fetch the correct ones for you. A one ton have 14 different rear axle designs

Apr 11, 2010 | GMC Sierra 3500HD Cars & Trucks

1 Answer

1994 GMC P/U's cruse control no longer works. Appears no power. Checked fuses in panel but no fuse by name of ''cruse'' and all fuses OK. Need diagram or schematic and/or help troubleshooting.


Does your turn signals, high headlight beam work? Also, does the AC function through the dash vents and not the defrost vents?

My cruise control quit and I found it was the vacuum lines running to the servo.

Aug 28, 2009 | 1994 GMC Safari

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