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My 2012 GMC Acadia is throwing codes. The primary is p0300.
My 2012 GMC Acadia is throwing codes. The primary is p0300. Since the codes have been reset, no check engine light, but it won't stay running. … read more
Roy
Roy
shop foreman
Associate Degree
4,585 satisfied customers
Getting a p0300 code. P0300, yes we did reset. 04 envoy
suv was running fine, and then it suddenly stald, when turning into drive way. restarted and it started to run ruff! check engine light started flashing, while driving!… read more
Chris
Chris
15,294 satisfied customers
I have an envoy 06 it has a P0300 it runs but very bad.
Hi I have an envoy 06 it has a P0300 it runs but very bad. There is a lot smoke getting out of the exhaust (kind of gray) I hear a little knock I already changed the spark plugs and the coils.… read more
Amedee
Amedee
Automotive Consultant
Vocational, Technical or Trade Scho
19,669 satisfied customers
I am having an issue with my 07 Escalade esv. I'm throwing
I am having an issue with my 07 Escalade esv. I'm throwing both C0561 and P0300. Has brand new plugs and wires.… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
Pulling codes P0300, C0035, C0055. Be 0090, U1016, B2610,
Pulling codes P0300, C0035, C0055. Be 0090, U1016, B2610, B1420, B2961, U1071Transmission shifting hard and acting funny. Brand-new Jasper transmission. 2006 GMC savanna 3500 4.8 L gas… read more
Ryan Schott
Ryan Schott
76 satisfied customers
The senser said it was coil and number 6 plug. I replaced them
the senser said it was coil and number 6 plug. I replaced them engine light went for a couple of days,now it has come back on. the tester says same thing number 6 plug and coil. any answer is apprecia… read more
Ron Z.
Ron Z.
- GMC Tech -
Vocational, Technical or Trade Scho
291 satisfied customers
Having a problem with my 2009 GMC Acadia. The other day it
Hi, This is Keith and having a problem with my 2009 GMC Acadia. The other day it started running real rough and the CEL activated and at some point it would flash and go back steady. Smelled of raw fu… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
I just bought a 2002 envoy sle. It has 121000 miles. It had
I just bought a 2002 envoy sle. It has 121000 miles. It had a miss in it. So I replaced the fuel filter,rear 02 sensor,crankshaft and camshaft sensor and spark plugs. The plugs I used were ac delco. N… read more
AZTechBrian
AZTechBrian
ASE Certified Technician & Shop Owner
Vocational, Technical or Trade School
732 satisfied customers
I have a 2006 gmc sierra with a 6.0 engine, I have been
I have a 2006 gmc sierra with a 6.0 engine, I have been getting a p0300 code for awhile now. I changed plugs and wires, fuel pump and maf sensor to no avail, this is a work truck and travels mainly on… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
2003 Envoy inline 6 idle rough when stopped no check engine
2003 Envoy inline 6 idle rough when stopped no check engine light. After it runs for a while its alright.… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Envoy SLT: 2007 GMC Envoy 4.2L drove fine last night stopped
2007 GMC Envoy 4.2L drove fine last night stopped and restarted. Noticed it felt like running on 3 cylinders and the CEL came on flashing. Wouldn't hardly run and checked it has a P0300 code today. I … read more
BOBBYSS
BOBBYSS
Automotive Repair/Damage Investigator
Associate Degree
14,591 satisfied customers
GMC Envoy SLT: Check engine light blinks. stops when I let
Check engine light blinks. stops when I let up off the gas. brand new muffler and convertor.… read more
Ron Z.
Ron Z.
- GMC Tech -
Vocational, Technical or Trade Scho
291 satisfied customers
GMC Yukon 4x4: I have a 98 Yukon 4wd... It throws a p0300
I have a '98 Yukon 4wd... It throws a p0300 at speed between 2200 RPM and 3000 rpm or so. You can feel it 'chug' or 'surge'. Car has 112k miles. Mechanics have replaced the fuel spider/injectors with … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Envoy XL: GMC envoy 5.8L V8 check engine light came on
GMC envoy 5.8L V8 check engine light came on and when I am idling at a stop light it sounds like it is going to quit. I have a innova code reader and the codes that it says are 4 codes: P0171-generic-… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GM Envoy: I have an 02 envoy with 290,000 miles. The SEL light
I have an 02 envoy with 290,000 miles. The SEL light on an blinking. I went to AutoZone who said I have a P0300 code. It is running rough and chugs but maintains 600 RPM at idle in drive or parked. It… read more
Jerry
Jerry
Service consultant
Vocational, Technical or Trade Scho
13,107 satisfied customers
I have an 04 Envoy,6 cylinder.Getting a code P0300.I changed
I have an '04 Envoy,6 cylinder.Getting a code P0300.I changed the plugs with AC Delco,and replaced all boots with included springs.Still getting code! The original code was P0306,which prompted me to … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
I have a 1998 chevy camaro 3.6 engin service engin light
i have a 1998 chevy camaro 3.6 engin service engin light stays on skipes bad at times most of the time it,s ok , when it skips the service engin light blinks on and off put new gas cap and coil as aut… read more
Hal
Hal
owner/service tech
Vocational, Technical or Trade Scho
925 satisfied customers
GMC Sierra: service soon light is flashing. engine running
service soon light is flashing. engine running rough idle. just changed o2 sensor driver side. 2005 sierra 2500 hd with 6L gasoline.… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
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Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,837 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

705 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

291 satisfied customers

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

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

Don - Mo Lurch

Don - Mo Lurch

ASE Certified Technician

234 satisfied customers

GM, GMC, Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics

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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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