2000 Suburban 5.3L 2WD
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Have changed fuel filter, fuel pressure regulator, oil, oil filter, and thermostat (fail open).
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I bought the vehicle like this so please don't judge lol I wouldn't let it get this bad if it was me but it's mine now so I gotta figure it out 😓 It had a rebuilt title, appears to be front end, new radiator assembly.
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The check engine is for knock sensors, which I plan on replacing along with the harnesses. And I'll be cleaning the fuel injectors since I'll have the rails off anyway.
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E-Brake light stuck on
Tow/Hitch light stuck onABS light on
172k miles.
When I start it, the idle jumps from 400-800 and the oil pressure goes from 0-20, but right after the oil change it was at or slightly above 40. I've also lost about 1qt-1.25qts in a month (100miles). One time when I started it after shutting it off after a long trip, a plume of white smoke came out the exhaust but it stopped immediately after, haven't seen it before or since. I was thinking maybe carbon build up since it was a 2.5hr drive and I've not taken it that far before. Had it brought to a mechanic, he hooked up a snap-on scanner and he said the engine was really strong, I take that with a grain of salt.
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I'd love to be able to answer any questions that might help me get this thing running right, please don't hesitate to ask.
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Thank y'all for your time 😁👍
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If you're going to work on your own truck, you need a scan tool to read the codes in the computer. Scan tool is more important than a socket set in modern vehicles. Failure codes help point the way to what's going on. Your dash is lit up like a Christmas tree so you need to know what codes are present.

 

10-4, got one of those 😁👍

This morning the idle got so low it shut off then displayed the battery light on dash readout on the left, but the battery was showing over 14v so 🤷‍♂️

 

Welcome to the forum. Unfortunately the code that the scanner reveals only points you in the direction but does not give you the step-by-step troubleshooting instructions available to the tech in the service department.