SOURCE: 2000 chevy silverado 1500 4.3 eng
Chevy Trucks, Blazers, S10 pickup and the like will vapor lock ecspecially the 2000 models. Do not tighten the gas cap past 1 click. There is a tube that runs from the top of the tank down and this gets hot and collapses or burns in half. We just bought a reinforced rubber tube cut it to lengh and use it instead of part and it's worked grat for 2 years so far.
SOURCE: '99 chevy Silverado Z71,5.3 engine.....will not rev when hot.....
try replacing your EGR Valve, or your Oxygen Sensor
SOURCE: po 101 and 300
To give you a little peace of mind, your engine is fine. I had the same problems with mine, and I totally forgot what they did to it and it was simple. I keep want to think it airmass sensor or throttle sensor its was one of those, they had the parts and seems like it took them 10minutes to replace and I was n and out. code 101 is airmass sensor and 300 is misfire the cause factor is from 101, you cant go faster than 40 to 50 mph even if you have the pedal to the floor..One of the mechanic state having Onstar system play a factor in it. Being electronics parts it may be still cover eventhough is 2003.
SOURCE: Chevy truck '02 surges between 45 and 55 mph
you should change the tps( throtal position sensor) this can cause that problem
SOURCE: How do you check voltage on the fuel pump on a
Hello Dennis.
When you are checking fuel pump voltage on your pickup when you turn on the key the voltage is only applied to the pump for a couple of seconds unless you go to cranking position.
There are 4 wires leading to the fuel pump on your truck. The gray wire is the 12 volt positive power feed to the fuel pump and the black provides the ground. The orange and purple wires are your fuel gauge wires.
The relay for the fuel pump is in your under hood fuse panel and I believe is marked on the underside of the fuse panel cover. It should click on and off again quickly when you turn the key to "on". Having a helper to cycle the key would be handy while you put your finger on the relay and listen to it. Just because it clicks still doesn't mean it's functional but relay failure on these models is somewhat rare.
I would start by checking for power at the fuel pump harness.
Fuel pump issues are quite common on these model year trucks.
Hope this helps you out.
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