Why does my 2001 Cheve Silverado 5.3 L make a knocking sound when started cold and then go away after it runs a minute or if it is driven a minute. The sound seems to come from the bottom of the motor or the tranny area and has been there since i bought the vehicle. It doesn't seem to be getting worse and someone suggested piston slap as the problem. Any ideas ?

Asked by Ratherfluffy Aug 15, 2013 at 03:27 PM about the 2001 Chevrolet Silverado 1500 LS Extended Cab 4WD

Question type: Maintenance & Repair

The fluids are good and the tranny is rebuilt too.

migration_judge_roy answered 10 years ago

a leaking fuel injector can dump gas....check the oil in your crankcase for evidence of fuel there...examine your injectors for leakage~

1 people found this helpful.

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875

LUVMYCHEVY answered 5 years ago

how many miles are on truck?

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F_O_R answered 5 years ago

Then again this could be a rod knock.

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Guru9BSGB4 answered 2 years ago

Probably the check valve in oil filter, well lack of just taking it longer to prime to top of motor. Was a issue in some early to late 90s trucks.

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Your Answer:

Why does my 2001 Cheve Silverado 5.3 L make a knocking sound when started cold and then go away after it runs a minute or if it is driven a minute. The sound seems to come from the bottom of the motor or the tranny area and has been there since i bought the vehicle. It doesn't seem to be getting worse and someone suggested piston slap as the problem. Any ideas ? 4 Answers

The fluids are good and the tranny is rebuilt too.

2001 Chevrolet Silverado 1500 LS Extended Cab 4WD

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Maintenance & Repair
I have a 2004 Chevy Silverado extended cab, 4.8 liter. I have had multiple issues with this vehicle, but the one I can't seem to solve is this: if I leave the truck sitting for a day, when I get in and start driving, about 5 miles down the road, it acts like it is being starved of fuel. The engine light starts blinking and there is no power even when i step on the gas fully. After a minute or two, it goes away and runs fine unless I let it sit for a couple days. I just replaced my fuel lines because they were rusted out but that didn't solve the problem. Any ideas anyone? 6 Answers

Engine light is always on and blinks on and off when problem occurs.

2004 Chevrolet Silverado 1500 Extended Cab 4WD

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Maintenance & Repair
my oil pressure went down to 0 and then i turned it off. its a 2001 chevy silverado. I turned it back on and it was fine. Then i started driving and it happened again and this time the engine shut off. Is there a safety feature that prevent the motor from seizing? 9 Answers

I was driving and the oil pressure started to fluctuate from 40 to 0 so i pulled over and shut it off. I then turned it on and it went back to 40. drove off and it happened again so i pulled over and ...

2001 Chevrolet Silverado 1500 Extended Cab LB RWD

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I have a 2001 Silverado 1500 4.3 v6. I bought it used about a year ago, it throws the code "camshaft to crankshaft position correlation fault" and it has a slight miss that is worse when it's wet out. 4 Answers

I've replaced the ignition module, distributor, cap, rotor, and the crankshaft sensor. I can't figure out the problem. Could someone please help?!?

2001 Chevrolet Silverado 1500 LS RWD

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Hi i have a 2001 chevy silverado with a 4.8 engine my problem is that i am getting current to the driver side of the injectors but all four injectors on the passenger side are not. what can it be? 5 Answers

Hi i have a 2001 chevy silverado with a 4.8 engine my problem is that i am getting current to the driver side of the injectors but all four injectors on the passenger side are not. what can it be?

2001 Chevrolet Silverado 1500 Extended Cab 4WD

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Maintenance & Repair

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my oil pressure went down to 0 and then i turned it off. its a 2001 chevy silverado. I turned it back on and it was fine. Then i started driving and it happened again and this time the engine shut off. Is there a safety feature that prevent the motor from seizing? 9 Answers

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