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I got a 1997 GMC C1500 with a Vortec 5.7. when i accelerate
gary I got a 1997 GMC C1500 with a Vortec 5.7 . when i accelerate it wants to backfire and hesitate and has no power. I just replace the fuel pump and i get a PSI of 50 it start ok and idols just fine… read more
Mike
Mike
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I put a tuneup on our 2000 gmc savanna van, the firing order
I put a tuneup on our 2000 gmc savanna van, the firing order in the book says 18436572 which has always been the firing order on most chevys I have owned. The van is now sputtering, and has now power.… read more
KALAMYKID
KALAMYKID
Shop owner, tech
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Same issue as current conversation except all my fuses are
Same issue as current conversation except all my fuses are good. No blown fuses, just no power going to fuel pump. Installed new fuel pump due to replaced two in past six months. … read more
Chris (aka-Moose)
Chris (aka-Moose)
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My 1999 Denali has an intermittent starting problem that I
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JFN1
JFN1
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I have a 1998 GMC Envoy it had a bad 4.3 vortec. I found a
I have a 1998 GMC Envoy it had a bad 4.3 vortec. I found a wrecked 2004 S10 with a 4.3 vortec w/low miles drilled & threaded out for old knock sen ,changed intake & exaust manifolds w/new flex pipe I … read more
Mike
Mike
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Engine will idle but will not accelerate. car goes dead when
engine will idle but will not accelerate. car goes dead when you try to take off. I have replaced fuel filter and throttle control valve. … read more
Ron
Ron
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I changed out the spider injector on a 4.3 Vortec v6 on a
I changed out the spider injector on a 4.3 Vortec v6 on a 2000 gmc jimmy due to it leaking down fuel into the cylinders and oil overnight.I installed it,but now when I crank the car it runs terrible,h… read more
GM Bob
GM Bob
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1998 S15 GMC 4.3 VORTEC RAN GOOD ON FRIDAY WILL NOT START ON
1998 S15 GMC 4.3 VORTEC RAN GOOD ON FRIDAY WILL NOT START ON SATURDAY NEW IGNITION COIL AND MODULE ALSO BATTERY… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
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Hi Pete. I have 93 jimmy with 4.3 cpi vin w motor. It is not
Hi Pete. I have 93 jimmy with 4.3 cpi vin w motor. It is not starting. I replaced fuel pump and filter. cpi injectors and fpr, whole distributor and icm, solinoid and main ECU. I do have spark im not … read more
Pete
Pete
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General auto certifications
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GMC Safari AWD: hi Tristan, im having a problem with my 2000
hi Tristan, im having a problem with my 2000 gmc safari it sputtered backfired and died on the highway. have replaced the icm vcm coil plugs and wires also have replaced the timing gears and chain. st… read more
ZZDaryl
ZZDaryl
Lead Auto Tech
Some college and advanced training
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gmc c3500 hd box truck (van cab): Hello . I have a 99 gmc
Hello . I have a 99 gmc 350 vortec. Driving to work this morning and in the first stop light 6 min out I went to take off and truck sputtered and hesitated anything beyond idle. I then pulled over tri… read more
Jerry
Jerry
Service consultant
Vocational, Technical or Trade Scho
13,107 satisfied customers
GMC Safari AWD: 1999 GMC Safari , vortec 4.3 , temperature
1999 GMC Safari , vortec 4.3 , temperature gauge was working until dealer checked the gauge panel . Dealer wanted to install a new panel at my cost . So where is this connector he plugged into to test… read more
Jerry
Jerry
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GMC Sierra K1500 SLE, 5.7, TBI, 4x4: Vehicle: Just purchased
Vehicle: Just purchased a 1993 GMC Sierra, SLE K1500, 4x4, short bed, reg cab, 5.7L TBI, swapped in a Turbo 400 transmission. Truck has 120,000 miles on the body. At 100,000 miles the previous owner b… read more
Mike S.
Mike S.
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GMC S15 Jimmy: My 4.3 V6 CPI will not start. All it does is
My 4.3 V6 CPI will not start. All it does is turning over. Just replaced the roter, cap, wires and plugs. Was runing good before R&R the parts. what went wrong?… read more
Mike S.
Mike S.
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GMC Sierra 1500 Pickup: 96 GMC pickup running rough random
96 GMC pickup running rough random codes (lean on bank 1 2 or random misfire) tried resetting emc, worked for a while so sent it in to be rebuilt installed rebuilt one, wont start at all turns over, a… read more
Jerry
Jerry
Service consultant
Vocational, Technical or Trade Scho
13,107 satisfied customers
I have a 96 GMC 1500 2wd p u truck with a 4.3 vortec engine.
I have a 96 GMC 1500 2wd p u truck with a 4.3 vortec engine. I have replaced plugs, fuel pump, fuel filter, ignition control module, coil and CPM. I get fuel to the throttle body, spark to the plugs, … read more
jonb9173
jonb9173
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I HAVE A 98 GMC SAFARI WITH THE 4.3 VORTEC IN IT, I JUMP
I HAVE A 98 GMC SAFARI WITH THE 4.3 VORTEC IN IT, I JUMP STARTED A CAR FOR A STRANDED WOMAN, DROVE MY VAN FOR FORTY MILES STOPPING SEVERAL TIMES. GOT HOME TURNED OFF ENGINE. IT HASNT STARTED SINCE. I … read more
Doug
Doug
Head technician
High School or GED
394 satisfied customers
GMC Safari AWD: I have a 95 4.3 vortec it stopped running sprayed
I have a 95 4.3 vortec it stopped running sprayed starter fluid in it and it started so i changed the fuel pump. It ran fine turned it off and tried to start again it back fired and never started agai… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
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Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,834 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,589 satisfied customers

GCM master tech over 25 years

Dave Nova

Dave Nova

GMC Technician

929 satisfied customers

ASE Master Certification. GM World Class Certification

Chris (aka-Moose)

Chris (aka-Moose)

GMC Technician

675 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

285 satisfied customers

18+yrs experience. State Inspector & GMC Diagnostics/Repair

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

George H.

George H.

ASE MasterTechnician

230 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

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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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