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What do3s the codes P0307 andP0449 mean on a 2007 Chevy Silverado 4x4

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P0307: Cylinder 7 Misfire Detected https://www.autocodes.com/p0307_chevrolet.html

P0449: Evaporative Emission Vent Valve Solenoid Malfunction https://www.autocodes.com/p0449_chevrolet.html

Posted on Dec 22, 2016

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Posted on Jan 02, 2017

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2hat does code #P0700 mean on a 2007 Chevy Silverado. 4x4 mean


DTC P0700: Transmission Control Module (TCM) Requested MIL Illumination
DTC P0700 can not be cleared from the ECM until the related TCM codes have been cleared.

The transmission control module (TCM) uses the (GMLAN) to signal the engine control module (ECM) that the TCM is requesting malfunction indicator lamp (MIL) illumination. This happens when the TCM has determined that a failure affecting emissions has occurred in transmission control system. When the ECM receives the a message from the TCM, DTC P0700 will set.
You don't say which engine your's has ! Or which transmission .
Automatic Transmission - 4L60-E/4L65-E/4L70-E

You need to have TCM checked for codes .

Dec 22, 2016 | Cars & Trucks

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HOW TO REPAIR A po307 engine code on a 2007 chevy silverado


the code p0307 is a misfire code on cylinder number 7 which is the 3rd cylinder on the driver side need to check spark plug and plug wire for that cylinder as it can be anything from a sticking valve to a vacuum leak what i do to check this is remove number 5 cylinder plug and wire and install them on cylinder number 7 and put plug and wire from 7 on 5 and clear codes and drive till light comes on and see if it comes up with same code if it does you will need to check for a vacuum leak or a valve problem with cylinder 7 if it comes up with a p0305 then change the plug and wire

May 14, 2014 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

4x4 neutral light stays on and 4x4 wont engage


Could be a problem in either the 4wd controller or the actuator on the transfer case. If you plan to keep the vehicle for awhile, purchase a used service GM manuals for your specific vehicle. The diagnostic flow charts are extremely helpful.

Sep 09, 2012 | 2007 Chevrolet Chevrolet Silverado 1500

1 Answer

02 chevy silverado 4x4 service light always on and stuck in 2 wheel drive.


You need to have the dealer scan the control module to see what codes show in memory

Jun 17, 2012 | 2002 Chevrolet Silverado 1500

1 Answer

2006 5.3ltr chevy silverado z71 p0455 andp0449


These codes are for the evaporative emission system.The 455 is the vent solenoid.The 455 is a large leak in the evap.system.The vent solenoid I would replace because they go bad and will not work because they are under the vehicle in the rear of the truck.There is a bulletin for these and the vent valve is installed in another spot.The number for the bulletin is 02-06-04-037E.You should also look for a broken or loose hose or pipe that might have came off.Specially if you ran over something.If none found it could just be the vent solenoid stuck in the venting position.Good luck.

Nov 30, 2009 | 2006 Chevrolet Silverado 1500 2WD

1 Answer

I have a 5.3 2007 chevy pickup with the following codes showing bb1, bb2 and bb3. Where do I find what the codes mean


Check engine light codes BBEVAP,
BB1 Purge or vent solenoids defective,
BB2 Check connector and wiring
BB3 Fuel saturated vapor cannister

Sep 27, 2009 | 2007 Chevrolet Silverado 1500HD

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