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Chevrolet is a division of the General Motors Corporation.

0 votes

Cobalt problems

The fuel system, combustion chambers and valves are dirty. Start by changing the motor oil and filter with a top synthetic oil like Mobil 1. Substitute one quart of oil with Marvel Mystery Oil (or a …
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1 vote

Hard warm start

The engine may get flooded. On a warm engine, left off for 20 minutes, remove the induction tubing, open the throttle body shutter and smell for raw gasoline. If heavy odor is detected, fuel pressur …
Carguy's user avatar
  • 2,200
3 votes

Any truth to the "myth" about changing transmission fluid in older vehicles?

The debate about transmission fluid change revolves around a basic problem. Typically, a transmission pan drop & fluid change only changes about half the fluid. The fresh fluid effectively cleans t …
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2 votes

Is ATF effective for cleaning carbonized heads and pistons?

Yes, ATF is highly effective at cleaning carbon, but Marvel Mystery Oil is even better (it's ATF mixed with dry cleaning fluid). If cold, allow the fluid to sit for at least two days, then spray with …
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0 votes

What does code P0401 mean?

You likely have a dirty EGR valve, dirty EGR pipe/line, gasket (see here for a listing of the parts). These parts total about $100, labor $60-$100. If you ignore the CEL, your head temperatures will …
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0 votes

Chevy sonic 2013 exhaust pipe

That's water leaking from a hole in the pipe. Water is a byproduct of combustion and it's normal to see water dripping from a tailpipe. Since water also promotes corrosion, holes can form in weak sp …
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1 vote

Started the process of programming my 2005 Malibu key, then battery died. Now process not wo...

Try disconnecting the battery for a few minutes, reconnect, and try programming again. You might also have a faulty passlock sensor in your key's ignition lock cylinder that may need replacing.
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0 votes

Ticking noise while idling that increases with acceleration

Sticky hydraulic lifters. Change the motor oil with Mobil 1 and substitute 1 quart with Marvel Mystery Oil. Run the car at highway speeds for 200-500 miles and change the oil again, this time adding …
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1 vote
Accepted

GM P0420 Code - Eliminating Possible Causes in Chevy G10

Your question is a bit confusing. "Is it possible for a fault with a specific sensor to trigger this P04020 error code, rather than a code specific to that sensor?" I think you are asking if sensors …
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1 vote
Accepted

'08 Silverado 1500 5.3L V8 electrical issues

Try cleaning the ground straps coming from the engine to the fender. Pull off every electrical connector you see and spray with CRC Electronic Cleaner. Have your battery and alternator tested for fr …
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1 vote

Why is coolant in the reservoir boiling?

There are several possible problems. The leak from the temp. sensors may be drawing air into the system when the vehicle cools, causing hot spots, boiling, vapor when the car is run again. You may h …
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