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I have a 2012 2500 hd with a 6.0. I'm getting code po306. I
I have a 2012 2500 hd with a 6.0. I'm getting code po306. I replaced the plugs because they have 150,000 on them. Didn't help. I checked and also switched wires. That didn't help. I replaced the coil.… read more
Ron Z.
Ron Z.
- Chevy Tech -
Vocational, Technical or Trade Scho
2,836 satisfied customers
Have changed the heater housing, which includes sensors.
Have changed the heater housing, which includes sensors. Cleared codes. Same proble … read more
Ivan Alvarez
Ivan Alvarez
Automotive Technician
207 satisfied customers
CHEVY SILVERADO 2500HD: I have a 2004 Chevy 2500HD / 6.6 turbo.
I have a 2004 Chevy 2500HD / 6.6 turbo. eng./ LB7 model. It is blowing white smoke. I was told to have 2 injectors replaced and I have had this done. Still blowing white smoke. lost faith in the mecha… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Avalanche..o2 sensor..the sensor and spark plugs..same codes
I have an 2005 Avalanche, that I am recieving codes saying that I have a bad o2 sensor on my number 1 bank. I changed out the sensor and spark plugs all at the same time but I am still recieving the s… read more
Randall
Randall
Auto Technician / Consultant
Vocational, Technical or Trade Scho
69 satisfied customers
I am working on a 2006 chevy colorado. It has a 3.5 5 cyl engine.
I am working on a 2006 chevy colorado. It has a 3.5 5 cyl engine. It, the truck, misses and runs rough at idle, seems to hit on all 5 at higher rpms. I scanned the truck and came up with a po301 code … read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
Chevy: express van..a code cyl 1 mis fire po301..po420
i have a chevy express van o4 with a code cyl 1 mis fire po301 and a code po420 cat system eff belw thres hold bank 1 what could this be… read more
David H
David H
Vocational, Technical or Trade Scho
2,413 satisfied customers
malibu: i replaced plugs..cats,checked injectors..shakes..mounts good.
i have 04 malibu 2.2 has code po300. i replaced plugs,o2sensors,mas sensor,both cats,checked injectors with noid light all working,still runsrough at idle motor shakes hard .motor mounts good.… read more
hauto
hauto
Operate own repair shop
Bachelor's Degree
1,637 satisfied customers
1998 chevy: up is running rough at driving speeds..high rpm..jerky
Hello, my 1998 chev silverado p/up is running rough at driving speeds. It feels like its missing a spark. Initial issue started a fews days ago only at high rpm (>2500rpm), now issue herky jerky/mi… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,642 satisfied customers
GM: Had injector #3 fail...they passed their flow test
i have an 03 6.6 with 102k miles. Had injector #3 fail. GM wouldn't cover it as they passed their flow test. I changed all 4 injectors on that bank to avoid more problems. Now it runs much better but … read more
JHoop
JHoop
Owner,Technician
High School or GED
1997 chevy venture: am getting a code..mena and how can i fix it
i have a 1997 chevy venture and i am getting a code PO300 what does this mena and how can i fix it… read more
zzdaryl
zzdaryl
Lead Auto Tech
Some college and advanced training
4 satisfied customers
1989 corvette: automatic..mas air flow..all the relay and sensors
i have a 1989 corvette automatic .check engine light come with acode 36 after i clear the computer it stay out for 3 starts them come baclk on after the forth start We replaced the the coputer and the… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
2007 Tahoe: shifts..gears..the car is making a slight jumping movement
My "service stabilitrak" light and "service traction control" light lights up every time I start my 2007 Tahoe. The truck also shifts very hard between 1st and 2nd gears. Also, when I'm sitting still … read more
Dave Nova
Dave Nova
Chevrolet Technician
Associate Degree
7,092 satisfied customers
2000 chevy truck: code read at autozone got a p0301..running rough
2000 chevy truck with a 5.3. code read at autozone got a p0301 . what could that be? running rough… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
2004 chevy malibu: engine runs rough..accelerate..35 mph..exhaust
I curently have a 2004 chevy malibu and am having motor problems. The engine runs rough at idle and it wont accelerate paste 35 mph. Also after about five minutes of driving, the exhaust starts glowin… read more
lazydog76
lazydog76
Auto Technician/ Firefighter-EMT
High School or GED
134 satisfied customers
probe: 3.4l..intake manifold gasket..fuel injectors..fuel rail
I honestly doubt any one here can fix this probl for me... I have a 1995 3.4l camaro and i have everything put together after doin the intake manifold gasket, EXCEPT the fuel injectors will not go all… read more
mlappert
mlappert
High School or GED
34 satisfied customers
06 Cobalt SS: The check engine light came..Autozone..cam sensor
I have a '06 Cobalt SS 2.4L not S/C. The check engine light came on and the guy at Autozone used the code reader and told my wife it was the cam sensor. Wouldn't this stop the car from running. It is … read more
Mcgruder73
Mcgruder73
Auto Technician
Associate Degree
2004 Cavalier: dohc..cylinder..po301 could it be the injector..miss
Have 2004 Cavalier 2.2L dohc had a po300 code found #2 cylinder Int valve stuck replaced both, resurfaced head now have po301 could it be the injector? I removed wire conn and the miss doesn't seem to… read more
BigBob
BigBob
Service Manager
High School or GED
2,846 satisfied customers
98 chevy blazer: 2wd..vortec..Its misses at idle and..intermittently
I have a 98 chevy blazer 2wd with a 4.3L vortec TBI. Its misses at idle and throughout the driving range and a PO301 code comes in intermittently. Any suggestions?… read more
Davo
Davo
Master Auto Tech/manager of auto shop
Vocational, Technical or Trade Scho
1,644 satisfied customers
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Ron Z.

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