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I have a 1997 gmc topkick will not start, have no fire and
i have a 1997 gmc topkick will not start, have no fire and no fuel … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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Have a 6500 GMC cat 3217 dies intimately sometimes ruse for
Have a 6500 GMC cat 3217 dies intimately sometimes ruse for weeks before it dies. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
2000 GMC Topkick with 3126 Cat will not start without ether.
2000 GMC Topkick with 3126 Cat will not start without ether. Seems ok once its running but if you slow down to stop it will die and will not restart without ether. Replace the fuel pressure regulator … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,648 satisfied customers
I have a 2001 gmc 6500 with the 3126 cat engine ifor a flat
I have a 2001 gmc 6500 with the 3126 cat engine ifor a flat bed tow truck and over the last 5 years at times the high idle shuts off on it's own. sometimes it will do right away sometimes when we move… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,648 satisfied customers
I have a 3126 and a c-7. 3127 came out of a 2003 6500 and we
i have a 3126 and a c-7. 3127 came out of a 2003 6500 and we put it in a 05 7500 that has a c-7. When we put the wiring and computer out of thr 3126 all the lights in the dash are on and runs like cra… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,648 satisfied customers
I have got a 99 Chevy 6500 with the cat 3126 started putting
I have got a 99 Chevy 6500 with the cat 3126 started putting Deisal in the coolant and we are about 800 miles from home will it hurt to drive it… read more
Alex Olsen
Alex Olsen
auto/diesel/industrial
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Have a problem with a 2000 gmc truck, 6500, 3126 cat diesel,
have a problem with a 2000 gmc truck, 6500, 3126 cat diesel, allason 545 transmission. diesel engine dies (but restarts ok) when switching gears from drive to reverse or park. engine must be warm. doe… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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1995 GMC TopKick LoPro with CAT 3116 engine. Vehicle has
1995 GMC TopKick LoPro with CAT 3116 engine. Vehicle has been parked for a few (5) years but ran perfectly when I pulled it alongside the shed. Put new batteries in it, turned on the key, everything l… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,892 satisfied customers
3126 cat in a 1999 GMC topkick C6500, I made a swap and I
3126 cat in a 1999 GMC topkick C6500, I made a swap and I need the full ecu wiring, … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I am working on a 1998 Gmc T7500 Truck with a V8-6.0L
I am working on a 1998 Gmc T7500 Truck with a V8-6.0L engine. Cylinder heads were removed together with pistons.I need the reassembly torque specifications for the heads and connecting rods. Thanks fo… read more
Curtis B.
Curtis B.
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HAVING TROUBLE STARTING OUR CAT ENGINE. TRUCK IS A 98 GMC
HAVING TROUBLE STARTING OUR CAT ENGINE. TRUCK IS A 98 GMC 6500. ENGINE IS A 3126, ALLASON TRANS. ENGINE RAN GREAT A FEW DAYS AGO. NOW IT WONT START. STARTS WITH STARTING FLUID, BUT WONT CONTINUE TO RU… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a 2002 chevy 6500 with cat 3126 having intermittent
I have a 2002 chevy 6500 with cat 3126 having intermittent problem with engine 1 fuse blowing. when its in the shop can not get fuse to blow. Traced wire from fuse block under dash to pcm found nothin… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
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GM c7500: I have an 2004 gmc c7500 with an cat engine and I
I have an 2004 gmc c7500 with an cat engine and I have 3 questions. What kind of oil should I used. 2.can I used Lucas injectors cleaner in my gas .3 can you make the abs light go off.… read more
Curtis B.
Curtis B.
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GMC 6500: I HAVE A 1998 GMC 6500 WITH A 3126 CAT ENGINE. NO
I HAVE A 1998 GMC 6500 WITH A 3126 CAT ENGINE. NO POWER TO STARTER FROM SWITCH,POWER COMING OUT OF NEUTRAL SAFETY SWITCH.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
GM 6500: HELLO WAYNE, I HAVE A 2002 GMC 6500 WITH A CAT
HELLO WAYNE, I HAVE A 2002 GMC 6500 WITH A CAT 3126 ENGINE. I AM HAVING ISSUES WITH THE TACH, THE FAST IDLE, AND THE SPEEDOMETER. I NEED WIRING DIAGRAMS AND OR ADVICE ON THESE PROLEMS. THANKS...AARON… read more
Wayne
Wayne
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Vocational, Technical or Trade Scho
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2000 GMC topkick with a 3126 cat engine. Shut off while running,
2000 GMC topkick with a 3126 cat engine. Shut off while running, will not restart. Checked voltage to ecm. 12 volts to pins 52 an 53 .I have 1200 psi. pressure in high pressure manifold while cranking… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,648 satisfied customers
04 CHEV 6500 W/CAT 3126 ,ALLISON TRANS (TRANS WAS JUST REBUILT.
04 CHEV 6500 W/CAT 3126 ,ALLISON TRANS (TRANS WAS JUST REBUILT. 420777 MILES, I BELIEVE I HAVE #1 INJECTOR BAD ,O-RINGS BAD -DIESEL IN OIL ,OIL IN DIESEL. I MAY START IT UP LOW POWER LIGHT MAY GO ON, … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
9,648 satisfied customers
Chevrolet c6500: I have a 1998 topkick chevy truck 6500 series
I have a 1998 topkick chevy truck 6500 series 6 speed with a 3126 diesel cat motor,the speedometer,odometer and tach stop working..it runs but sputters going uphills,then it just seems like the pedal … read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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Meet the Experts:

Daniel Wilson

Daniel Wilson

2,803 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

9,648 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

2,892 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,243 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician

cumminsdr

cumminsdr

Mechanic

1,351 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

991 satisfied customers

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

dieseldan55

dieseldan55

Contractor

74 satisfied customers

Road Service mechanic for Volvo Construction.

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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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