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2000 gmc topkick c6500 7.4 454 auto. Replaced radiator due
2000 gmc topkick c6500 7.4 454 auto. Replaced radiator due to small leak and when warming up I noticed the water pump was also leaking and the temp gauge would never go past 80 degrees Fahrenheit on t… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
I am having problems finding the fuel filter on a 2000 GMC
I am having problems finding the fuel filter on a 2000 GMC C6500 (former Uhaul truck). Not sure if it is dirty and camoflauged. I try to trace the lines from the fuel tank but they hide going over the frame. My engine is hard to start and almost dies when you first give it gas. Good at higher RPMs. Thinking it sat too long and needs new filter. Thanks for any advice … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
391 satisfied customers
2000 gmc c5500 topkick 7m4 454 auto trans. Backed it into
2000 gmc c5500 topkick 7m4 454 auto trans. Backed it into driveway and shut it off and now it will not turn over at all. Checked starter and voltage is coming to the big wire but I cant get any voltag… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
2000 gmc c6000 topkick 7.4 454 auto trans. Wondering what
2000 gmc c6000 topkick 7.4 454 auto trans. Wondering what the procedure is for installing the cam sensor synchronizer. It is like a distributor but this engine is has a coil for each plug so there is … read more
Expert
Expert
7,409 satisfied customers
2000 gmc topkick c6000 7.4 454 gas auto trans. Has a hard
2000 gmc topkick c6000 7.4 454 gas auto trans. Has a hard time starting and if you try to start it for too long, it has a huge backfire out of the exhaust. Only code is an o2 sensor low voltage on ban… read more
Expert
Expert
7,409 satisfied customers
I have a 1996 GMC Topkick C7H042 with a 6.0L engine. Manual
Hello, I have a 1996 GMC Topkick C7H042 with a 6.0L engine. Manual trans. Car was neglected severely. Replaced clutch and now car cranks and doesnt turn over. Has spark and fuel pressure. No Injector … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
391 satisfied customers
I have a 2008 Gmc 5500 topkick Duramax engine 1st the
I have a 2008 Gmc 5500 topkick Duramax engine 1st the sending unit leaked around top took out cant find replacement not making anymore or some thing it was exposed water was over ran onto unit and suc… read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
21,571 satisfied customers
2000 gmc c5500 topkick 7.4 454. Hydroboost rod that comes
2000 gmc c5500 topkick 7.4 454. Hydroboost rod that comes out of hydroboost and hooks to brake pedal keeps coming out of hydroboost. Have replaced hydroboost at least 6 times and within a month to 3 m… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
391 satisfied customers
2000 GMC c5500 topkick 7.4 454. Started it up this morning
2000 GMC c5500 topkick 7.4 454. Started it up this morning and reduced power light was on and throttle had no response whatsoever. Turned it off and back on a few times and reduced power light went of… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
391 satisfied customers
2000 GMC c5500 topkick 7.4 454 24 foot uhaul box truck. When
2000 GMC c5500 topkick 7.4 454 24 foot uhaul box truck. When you turn left from a stop it is almost impossible without revving it up. Replaced tie rod ends, power steering pump and hydroboost.… read more
Expert
Expert
7,409 satisfied customers
2004 GMC 6.6 DURAMAXX heard a loud pop from under the hood
2004 GMC 6.6 DURAMAXX heard a loud pop from under the hood and then saw white smoke come from under the hood and then truck stop running. Truck will turn over and attempt to start but each time it sou… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
2000 gmc c5500 topkick 7.4 454. Was removing leaking
2000 gmc c5500 topkick 7.4 454. Was removing leaking hydroboost and when I went to separate the hydroboost motor from the hydroboost unit, a check ball fell out and I dont know what hole it goes back … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
391 satisfied customers
2000 gmc c5500 topkick 7.4 454 at545 auto trans. Just
2000 gmc c5500 topkick 7.4 454 at545 auto trans. Just replaced transmission and I'm not getting any power to the signal wire of the starter. Checked neutral safety backup switch and wires look fine bu… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I am considering buying a 2000 GMC C6500 / C5500 and
I am considering buying a 2000 GMC C6500 / C5500 and restoring it. Are there any parts that might be impossible to find, so my project is likely to hit an obstacle that cannot be fixed? For example, e… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
391 satisfied customers
I have a swann propane truck c5500 gmc the injectors are
I have a swann propane truck c5500 gmc the injectors are going bad I WOULD LIKE TO CHANGE IT TO GASOLINE THE INJECTORS ARE CHEAP FOR GASOLINE … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
I have a 2007 GMC topkick c5500. The other day one of the
I have a 2007 GMC topkick c5500. The other day one of the guys was driving it, shut it off and it wouldn't restart, it had no power to the cab. Finally got it to start then driving down the road lost … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
gmc c6000: 1994 gmc topkick c6000 with 6.0 366 big block and
1994 gmc topkick c6000 with 6.0 366 big block and Allison transmission. Just put new engine and transmission in it, got it in time and it started right up and ran great in idle but when you put it in … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
GM top kick: 1993 GMC Topkick (old Uhaul truck) C6000.
I have a 1993 GMC Topkick (old Uhaul truck) C6000. Backfires and loses power usually after it has been running for 15-25 minutes. Appears to happen just as the transmission is about to shift up a gear… read more
tractordoc65
tractordoc65
heavy equipment mechanic
Vocational, Technical or Trade Scho
1 satisfied customers
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Chris (aka-Moose)

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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