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Showing results for tags 'tuneup'.
We bought a 2000 Chevy 2500 with 189k miles and with the 6.0l and need to get tuned up. I'm trying to decide if I need to replace the plug wires they Packard's which may be the factory original wires. Are Packard wires the original wires (see pic for reference)? I don't have a SES light, but need to scan it for codes.
So i cleaned the maf and throttle body and put half a can of seefoam in the pvc valve and some injector cleaner in the gas tank. It feels like its running better but still has a rough idle. the rpms are near 5 to 6 when the engine is warm that's when it shakes the most you can feel it in the drivers seat. Is there anything I'm missing or should of done differently? 2004 GMC Sierra 2500HD 6.0