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Related Medium and Heavy Trucks Questions
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
7,463 satisfied customers
A brake line broke on my 92 top kick 366 and it sat in the
A brake line broke on my 92 top kick 366 and it sat in the hay field for 2 weeks before I could get it fixed. After I replace the line it started fine but as I took it down the trail to get off the fi… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
1991 gmc topkick c6000 6.0l won't start just a click. It
1991 gmc topkick c6000 6.0l won't start just a click. It started fine then the key broke off in the ignition replaced ignition tried to cram the truck it started to turn over I let off the key. Tried … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have a friend with a 1992 GMC Topkick with the 6.0 L
I have a friend with a 1992 GMC Topkick with the 6.0 L engine. Truc has been sitting for three years and not started. After replacing the batteries, It will start and idle fine...but no throttle respo… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
2000 GMC Topkick, 3126 Cat. Check gauges light will flicker,
2000 GMC Topkick, 3126 Cat. Check gauges light will flicker, buzzer will sound. Engine will die, just like the ignition switch was shut off. Starts back fine. Any ideas? … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
REPLACING MY PLUGS AND WIRES FOR THE 4TH TIME IN 2 YEARS ON
REPLACING MY PLUGS AND WIRES FOR THE 4TH TIME IN 2 YEARS ON MY TOPKICK 366 V8 DUE TO EXCESSIVE HEAT FROM MANIFOLD THAT BASICALLY WRAPS AROUND PLUGS DOES GM PROVIDE A HEAT SHIELD TO SOLVE THIS PROBLEM… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
35,300 satisfied customers
Are you actually there? 1986 c6500. I just bought it and the
I just bought it and the power seems to come and go driving down the highway between 55 and 65 miles per hour. When you're at idle and you go to gently accelerate you can hear a little hesitation and unevenness as the engine tries to idle up … read more
Curtis B.
Curtis B.
Technician
Associate Degree
38,794 satisfied customers
I have a 1990 gmc topkick with a 3116 engine. The truck
I have a 1990 gmc topkick with a 3116 engine. The truck starts up fine when cold. After a few minutes an alarm starts buzzing then it will die. It will then immediately restart, the alarm comes back a… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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1994 gmc c6000 topkick 6.0 366 at545 allison. Coming home
1994 gmc c6000 topkick 6.0 366 at545 allison. Coming home yesterday and turned into my driveway and it stopped moving. Turned off and started back up and it started in reverse. Got it back to the shop… read more
Expert
Expert
7,463 satisfied customers
A friend hs a 1992 GMC Topkick Lopro with a 366 V-8. Truck
A friend hs a 1992 GMC Topkick Lopro with a 366 V-8. Truck has been sitting in a lot for three years without a battery and has not been started. I put a battery in this afternoon and cranked her over.… read more
Curtis B.
Curtis B.
Technician
Associate Degree
38,794 satisfied customers
My 1994 topkick just died while driveing i disconnected the
hi my 1994 topkick just died while driveing i disconnected the hoses and now i can't figure out what goes where, trying to find a manual … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
I have a 99 GMC that throwing a reduced engine power light,
I have a 99 GMC that throwing a reduced engine power light … read more
Expert
Expert
7,463 satisfied customers
2006 international vt365. Has a miss on cylinders 2 and 7.
2006 international vt365. Has a miss on cylinders 2 and 7. Replaced injectors and injector to idm wiring. Both cylinders have 300 psi compression. Truck has new head gaskets as well.… read more
Alex Olsen
Alex Olsen
auto/diesel/industrial
524 satisfied customers
I have a 1990 topkick truck with a 366 and will not rev up.
i have a 1990 topkick truck with a 366 and will not rev up. it will idle fine. ive replaced the coolant temp sensor,distributor and cap. what else to check? it doesnt have any codes.… read more
Doug Barnowski
Doug Barnowski
HD truck tech
14 satisfied customers
1994 gmc c6000 top kick 6.0 366 v8 big block and at545
1994 gmc c6000 top kick 6.0 366 v8 big block and at545 allison tranny. Just put in remanufactured tranny for the third time and the front seal is pouring. Last one had the same problem but not as bad … read more
Curtis B.
Curtis B.
Technician
Associate Degree
38,794 satisfied customers
I have a 2011 international truck with a maxxforce engine
I have a 2011 international truck with a maxxforce engine that won't start. I retrieved a code 261 fmi 7 undocumented code mechanical failure. Can you help me identify the problem area? The last 8 of … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Jeremy , recently . On my 93 gmc topkick 366 motor .
Hello Jeremy , recently . On my 93 gmc topkick 366 motor . It's an old Uhaul . Cold - my truck fires right up and idles fine and runs smoothly . When I let idle up and run there no problem . Now , rig… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
94 gmc topkick c6000 with 366 big block. runs very rough at
94 gmc topkick c6000 with 366 big block. runs very rough at idle and most of the time it stalls out. replaced fuel pump, fuel injectors, fuel filter, spark plugs, wires, cap and rotor. replaced air fi… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

4,023 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

2,740 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

cumminsdr

cumminsdr

Mechanic

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All types of Cummins applications

Curtis B.

Curtis B.

Technician

38,794 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

353 satisfied customers

24 years of experience diagnosing & repairing

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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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